# Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. from __future__ import print_function import numpy as np import math from paddle.common_ops_import import fill_constant from ..fluid.layers import utils from ..static import Variable, device_guard from ..framework import _current_expected_place, _get_paddle_place from ..framework import dygraph_only from ..framework import core from ..framework import in_dygraph_mode, _non_static_mode from ..framework import LayerHelper from ..fluid.data_feeder import check_variable_and_dtype, check_type, check_dtype, convert_dtype from ..framework import convert_np_dtype_to_dtype_, _varbase_creator, OpProtoHolder # TODO: define functions to get create a tensor import paddle from paddle import _C_ops from ..fluid.framework import _in_legacy_dygraph, _in_eager_without_dygraph_check import warnings __all__ = [] def _complex_to_real_dtype(dtype): if dtype == core.VarDesc.VarType.COMPLEX64: return core.VarDesc.VarType.FP32 elif dtype == core.VarDesc.VarType.COMPLEX128: return core.VarDesc.VarType.FP64 else: return dtype def _real_to_complex_dtype(dtype): if dtype == core.VarDesc.VarType.FP32: return core.VarDesc.VarType.COMPLEX64 elif dtype == core.VarDesc.VarType.FP64: return core.VarDesc.VarType.COMPLEX128 else: return dtype def linspace(start, stop, num, dtype=None, name=None): r""" Return fixed number of evenly spaced values within a given interval. Args: start(int|float|Tensor): The input :attr:`start` is start variable of range. It is a scalar, \ or a Tensor of shape [1] with input data type int32, int64, float32 or float64. stop(int|float|Tensor): The input :attr:`stop` is start variable of range. It is a scalar, \ or a Tensor of shape [1] with input data type int32, int64, float32 or float64. num(int|Tensor): The input :attr:`num` is given num of the sequence. It is an int scalar, \ or a Tensor of shape [1] with data type int32. dtype(np.dtype|str, optional): The data type of output tensor, it could be int32, int64, float32 and float64. Default: if None, the data type is float32. name(str, optional): For details, please refer to :ref:`api_guide_Name`. Generally, no setting is required. Default: None. Returns: Tensor: the output data type will be float32, float64. The 1-D tensor with fixed number of evenly spaced values, \ the data shape of this tensor is :math:`[num]` . If the :attr:`num` is set 1, the output tensor just has \ the value with input :attr:`start`. Examples: .. code-block:: python import paddle data = paddle.linspace(0, 10, 5, 'float32') # [0.0, 2.5, 5.0, 7.5, 10.0] data = paddle.linspace(0, 10, 1, 'float32') # [0.0] """ if dtype is None: dtype = 'float32' tensor_num = num tensor_start = start tensor_stop = stop if not isinstance(num, Variable): check_type(num, 'num', (int), 'linspace') if not isinstance(dtype, core.VarDesc.VarType): dtype = convert_np_dtype_to_dtype_(dtype) if not isinstance(start, Variable): with device_guard("cpu"): tensor_start = fill_constant([1], dtype, start, force_cpu=True) if not isinstance(stop, Variable): with device_guard("cpu"): tensor_stop = fill_constant([1], dtype, stop, force_cpu=True) if not isinstance(num, Variable): with device_guard("cpu"): tensor_num = fill_constant([1], 'int32', num, force_cpu=True) if _non_static_mode(): return _C_ops.linspace(tensor_start, tensor_stop, tensor_num, 'dtype', dtype) helper = LayerHelper("linspace", **locals()) start_dtype = convert_dtype(tensor_start.dtype) stop_dtype = convert_dtype(tensor_stop.dtype) out_dtype = convert_dtype(dtype) if isinstance(start, Variable): check_dtype(start.dtype, 'start', ['float32', 'float64', 'int32', 'int64'], 'linspace') else: check_type(start, 'start', (int, float), 'linspace') if isinstance(stop, Variable): check_dtype(stop.dtype, 'stop', ['float32', 'float64', 'int32', 'int64'], 'linspace') else: check_type(stop, 'stop', (int, float), 'linspace') if isinstance(num, Variable): check_dtype(num.dtype, 'num', ['int32'], 'linspace') check_dtype(dtype, 'dtype', ['int32', 'int64', 'float32', 'float64'], 'linspace') if ((stop_dtype == "float64" or start_dtype == "float64") and out_dtype in ["float32", "int32"]) or ( (stop_dtype == "int64" or start_dtype == "int64") and out_dtype == "int32"): raise ValueError( "The dtype of start/stop is {}/{} but the attr(dtype) of linspace is {}, " "which may cause data type overflows. Please reset attr(dtype) of linspace." .format(start_dtype, stop_dtype, dtype)) out = helper.create_variable_for_type_inference(dtype=dtype) helper.append_op(type='linspace', inputs={ 'Start': tensor_start, 'Stop': tensor_stop, 'Num': tensor_num }, attrs={'dtype': dtype}, outputs={'Out': [out]}) if isinstance(num, int): out.desc.set_shape((num, )) return out def logspace(start, stop, num, base=10.0, dtype=None, name=None): r""" Return fixed number of logarithmical-evenly spaced values within the interval \ :math:`[base^{start}, base^{stop}]`. Notes: This API does not compute the gradient. Args: start(int|float|Tensor): The input :attr:`start` is exponent of first entry in \ the sequence. It is a scalar, or a Tensor of shape [1] with input data \ type int32, int64, float32 or float64. stop(int|float|Tensor): The input :attr:`stop` is exponent of last entry in the \ sequence. It is a scalar, or a Tensor of shape [1] with input data \ type int32, int64, float32 or float64. num(int|Tensor): The input :attr:`num` is given number of items in the sequence. \ It is an int scalar, or a Tensor of shape [1] with data type int32. base(int|float|Tensor): The input :attr:`base` is base of the logarithm function. \ It is a scalar, or a Tensor of shape [1] with input data type int32, int64, \ float32 or float64. dtype(np.dtype|str, optional): The data type of output tensor, it could be \ int32, int64, float32 or float64. Default: if None, the data type is float32. \ name(str, optional): For details, please refer to :ref:`api_guide_Name`. Generally, no setting is required. Default: None. Returns: Tensor: The output data type will be float32, float64. The 1-D tensor with \ fixed number of logarithmical-evenly spaced values, the data shape of this \ tensor is :math:`[num]`. If the :attr:`num` is set 1, the output tensor \ just has the value with exponential of :attr:`start` with base :attr:`base`. Examples: .. code-block:: python :name: logspace-example import paddle data = paddle.logspace(0, 10, 5, 2, 'float32') # [1. , 5.65685415 , 32. , 181.01933289, 1024. ] data = paddle.logspace(0, 10, 1, 2, 'float32') # [1.] """ if dtype is None: dtype = 'float32' tensor_num = num tensor_start = start tensor_stop = stop tensor_base = base if not isinstance(num, Variable): check_type(num, 'num', (int), 'logspace') if not isinstance(dtype, core.VarDesc.VarType): dtype = convert_np_dtype_to_dtype_(dtype) if not isinstance(start, Variable): with device_guard("cpu"): tensor_start = fill_constant([1], dtype, start) if not isinstance(stop, Variable): with device_guard("cpu"): tensor_stop = fill_constant([1], dtype, stop) if not isinstance(num, Variable): with device_guard("cpu"): tensor_num = fill_constant([1], 'int32', num) if not isinstance(base, Variable): with device_guard("cpu"): tensor_base = fill_constant([1], dtype, base) if _non_static_mode(): return _C_ops.logspace(tensor_start, tensor_stop, tensor_num, tensor_base, 'dtype', dtype) helper = LayerHelper("logspace", **locals()) start_dtype = convert_dtype(tensor_start.dtype) stop_dtype = convert_dtype(tensor_stop.dtype) base_dtype = convert_dtype(tensor_base.dtype) out_dtype = convert_dtype(dtype) if isinstance(start, Variable): check_dtype(start.dtype, 'start', ['float32', 'float64', 'int32', 'int64'], 'logspace') else: check_type(start, 'start', (int, float), 'logspace') if isinstance(stop, Variable): check_dtype(stop.dtype, 'stop', ['float32', 'float64', 'int32', 'int64'], 'logspace') else: check_type(stop, 'stop', (int, float), 'logspace') if isinstance(num, Variable): check_dtype(num.dtype, 'num', ['int32'], 'logspace') if isinstance(base, Variable): check_dtype(base.dtype, 'base', ['float32', 'float64', 'int32', 'int64'], 'logspace') else: check_type(base, 'base', (int, float), 'logspace') check_dtype(dtype, 'dtype', ['int32', 'int64', 'float32', 'float64'], 'logspace') if ((stop_dtype == "float64" or start_dtype == "float64" or base_dtype == "float64") and out_dtype in ["float32", "int32"]) or \ ((stop_dtype == "int64" or start_dtype == "int64" or base_dtype == "int64") and out_dtype == "int32"): raise ValueError( "The dtype of start/stop/base is {}/{}/{} but the attr(dtype) of logspace is {}, " "which may cause data type overflows. Please reset attr(dtype) of logspace." .format(start_dtype, stop_dtype, base_dtype, dtype)) out = helper.create_variable_for_type_inference(dtype=dtype) helper.append_op(type='logspace', inputs={ 'Start': tensor_start, 'Stop': tensor_stop, 'Num': tensor_num, 'Base': tensor_base }, attrs={'dtype': dtype}, outputs={'Out': [out]}) if isinstance(num, int): out.desc.set_shape((num, )) return out @dygraph_only def to_tensor(data, dtype=None, place=None, stop_gradient=True): r""" Constructs a ``paddle.Tensor`` from ``data`` , which can be scalar, tuple, list, numpy\.ndarray, paddle\.Tensor. If the ``data`` is already a Tensor, copy will be performed and return a new tensor. If you only want to change stop_gradient property, please call ``Tensor.stop_gradient = stop_gradient`` directly. Args: data(scalar|tuple|list|ndarray|Tensor): Initial data for the tensor. Can be a scalar, list, tuple, numpy\.ndarray, paddle\.Tensor. dtype(str|np.dtype, optional): The desired data type of returned tensor. Can be 'bool' , 'float16' , 'float32' , 'float64' , 'int8' , 'int16' , 'int32' , 'int64' , 'uint8', 'complex64' , 'complex128'. Default: None, infers dtype from ``data`` except for python float number which gets dtype from ``get_default_type`` . place(CPUPlace|CUDAPinnedPlace|CUDAPlace|str, optional): The place to allocate Tensor. Can be CPUPlace, CUDAPinnedPlace, CUDAPlace. Default: None, means global place. If ``place`` is string, It can be ``cpu``, ``gpu:x`` and ``gpu_pinned``, where ``x`` is the index of the GPUs. stop_gradient(bool, optional): Whether to block the gradient propagation of Autograd. Default: True. Returns: Tensor: A Tensor constructed from ``data`` . Examples: .. code-block:: python import paddle type(paddle.to_tensor(1)) # paddle.to_tensor(1) # Tensor(shape=[1], dtype=int64, place=CPUPlace, stop_gradient=True, # [1]) x = paddle.to_tensor(1, stop_gradient=False) print(x) # Tensor(shape=[1], dtype=int64, place=CPUPlace, stop_gradient=False, # [1]) paddle.to_tensor(x) # A new tensor will be created with default stop_gradient=True # Tensor(shape=[1], dtype=int64, place=CPUPlace, stop_gradient=True, # [1]) paddle.to_tensor([[0.1, 0.2], [0.3, 0.4]], place=paddle.CPUPlace(), stop_gradient=False) # Tensor(shape=[2, 2], dtype=float32, place=CPUPlace, stop_gradient=False, # [[0.10000000, 0.20000000], # [0.30000001, 0.40000001]]) type(paddle.to_tensor([[1+1j, 2], [3+2j, 4]], dtype='complex64')) # paddle.to_tensor([[1+1j, 2], [3+2j, 4]], dtype='complex64') # Tensor(shape=[2, 2], dtype=complex64, place=CPUPlace, stop_gradient=True, # [[(1+1j), (2+0j)], # [(3+2j), (4+0j)]]) """ place = _get_paddle_place(place) if place is None: place = _current_expected_place() elif not isinstance( place, (core.Place, core.CPUPlace, core.CUDAPinnedPlace, core.CUDAPlace, core.NPUPlace, core.XPUPlace, core.MLUPlace, core.CustomPlace)): raise ValueError( "'place' must be any of paddle.Place, paddle.CPUPlace, paddle.CUDAPinnedPlace, paddle.CUDAPlace, paddle.NPUPlace, paddle.XPUPlace, paddle.MLUPlace, paddle.CustomPlace" ) if not isinstance(data, np.ndarray): def _handle_dtype(data, dtype): if dtype: if convert_dtype(dtype) != convert_dtype(data.dtype): return data.astype(convert_dtype(dtype)) return data if np.isscalar(data) and not isinstance(data, str): data = np.array([data]) elif isinstance(data, (list, tuple)): data = np.array(data) if data.dtype == np.object_: raise ValueError( "\n\tFaild to convert input data to a regular ndarray :\n\t - Usually " "this means the input data contains nested lists with different lengths. " ) elif isinstance(data, paddle.Tensor) and not in_dygraph_mode(): data = data._copy_to(place, False) data = _handle_dtype(data, dtype) data.stop_gradient = stop_gradient return data elif isinstance(data, core.eager.Tensor) and in_dygraph_mode(): data = data._copy_to(place, False) data = _handle_dtype(data, dtype) data.stop_gradient = stop_gradient return data elif isinstance(data, (core.LoDTensor, core.Tensor)): # should't expose it to users, just for internal use. # convert core.Tensor/core.LoDTensor to VarBase first # Currenly, there is no copy when places are same if in_dygraph_mode(): data = core.eager.Tensor(data) else: data = paddle.Tensor(data) if not data.place._equals(place): data = data._copy_to(place, False) data = _handle_dtype(data, dtype) data.stop_gradient = stop_gradient return data else: raise TypeError( "Can't constructs a 'paddle.Tensor' with data type {}, data type must be scalar|list|tuple|np.ndarray|paddle.Tensor" .format(type(data))) if not dtype: if data.dtype in [ 'float16', 'float32', 'float64', 'complex64', 'complex128' ]: default_type = paddle.get_default_dtype() if np.iscomplexobj(data): default_type = 'complex64' if default_type in [ 'float16', 'float32' ] else 'complex128' data = data.astype(default_type) # Windows default type is 'int32', while Linux/Mac is 'int64'. Unify they. if data.dtype in ['int32']: default_type = "int64" data = data.astype(default_type) if dtype and convert_dtype(dtype) != data.dtype: data = data.astype(convert_dtype(dtype)) if _in_eager_without_dygraph_check() and isinstance(data, np.ndarray): return core.eager.Tensor(value=data, place=place, persistable=False, zero_copy=False, name=None, stop_gradient=stop_gradient) else: return paddle.Tensor(value=data, place=place, persistable=False, zero_copy=False, stop_gradient=stop_gradient) def full_like(x, fill_value, dtype=None, name=None): """ This function creates a tensor filled with ``fill_value`` which has identical shape of ``x`` and ``dtype``. If the ``dtype`` is None, the data type of Tensor is same with ``x``. Args: x(Tensor): The input tensor which specifies shape and data type. The data type can be bool, float16, float32, float64, int32, int64. fill_value(bool|float|int): The value to fill the tensor with. Note: this value shouldn't exceed the range of the output data type. dtype(np.dtype|str, optional): The data type of output. The data type can be one of bool, float16, float32, float64, int32, int64. The default value is None, which means the output data type is the same as input. name(str, optional): For details, please refer to :ref:`api_guide_Name`. Generally, no setting is required. Default: None. Returns: Tensor: Tensor which is created according to ``x``, ``fill_value`` and ``dtype``. Examples: .. code-block:: python import paddle input = paddle.full(shape=[2, 3], fill_value=0.0, dtype='float32', name='input') output = paddle.full_like(input, 2.0) # [[2. 2. 2.] # [2. 2. 2.]] """ if dtype is None: dtype = x.dtype else: if not isinstance(dtype, core.VarDesc.VarType): dtype = convert_np_dtype_to_dtype_(dtype) if in_dygraph_mode(): return _C_ops.final_state_full_like(x, fill_value, dtype, x.place) if _in_legacy_dygraph(): return _C_ops.fill_any_like(x, 'value', fill_value, 'dtype', dtype) helper = LayerHelper("full_like", **locals()) check_variable_and_dtype( x, 'x', ['bool', 'float16', 'float32', 'float64', 'int16', 'int32', 'int64'], 'full_like') check_dtype( dtype, 'dtype', ['bool', 'float16', 'float32', 'float64', 'int16', 'int32', 'int64'], 'full_like/zeros_like/ones_like') out = helper.create_variable_for_type_inference(dtype=dtype) helper.append_op(type='fill_any_like', inputs={'X': [x]}, attrs={ 'value': fill_value, "dtype": dtype }, outputs={'Out': [out]}) out.stop_gradient = True return out def ones(shape, dtype=None, name=None): """ Create a Tensor of specified :attr:`shape` and :attr:`dtype` and fill it with 1. Args: shape (tuple|list|Tensor): Shape of the Tensor to be created, the data type of shape should be int32 or int64. dtype (np.dtype|str, optional): Data type of output Tensor, it should be one of bool, float16, float32, float64, int32 and int64. If it is set to None, the data type will be float32. name (str, optional): For details, please refer to :ref:`api_guide_Name`. Generally, no setting is required. Default: None. Returns: Tensor: A Tensor of data type :attr:`dtype` with shape :attr:`shape` and all elements are 1. Examples: .. code-block:: python :name: ones-example import paddle # default dtype for ones OP data1 = paddle.ones(shape=[3, 2]) # [[1. 1.] # [1. 1.] # [1. 1.]] data2 = paddle.ones(shape=[2, 2], dtype='int32') # [[1 1] # [1 1]] # shape is a Tensor shape = paddle.full(shape=[2], dtype='int32', fill_value=2) data3 = paddle.ones(shape=shape, dtype='int32') # [[1 1] # [1 1]] """ if dtype is None: dtype = 'float32' return fill_constant(value=1.0, shape=shape, dtype=dtype, name=name) def ones_like(x, dtype=None, name=None): """ Returns a Tensor filled with the value 1, with the same shape and data type (use ``dtype`` if ``dtype`` is not None) as ``x``. Args: x(Tensor): The input tensor which specifies shape and dtype. The dtype of ``x`` can be bool, float16, float32, float64, int32, int64. dtype(str|np.dtype, optional): The data type of the output tensor. Supported data types: bool, float16, float32, float64, int32, int64. If ``dtype`` is None, the data type is the same as ``x``. Default is None. name(str, optional): For details, please refer to :ref:`api_guide_Name`. Generally, no setting is required. Default: None. Returns: Tensor: A Tensor filled with the value 1, with the same shape and data type (use ``dtype`` if ``dtype`` is not None) as ``x``. Examples: .. code-block:: python import paddle x = paddle.to_tensor([1,2,3]) out1 = paddle.ones_like(x) # [1., 1., 1.] out2 = paddle.ones_like(x, dtype='int32') # [1, 1, 1] """ return full_like(x=x, fill_value=1, dtype=dtype, name=name) def zeros(shape, dtype=None, name=None): """ Creates a tensor of specified :attr:`shape` and :attr:`dtype`, and fills it with 0. Args: shape(tuple|list|Tensor): Shape of the Tensor to be created, the data type of ``shape`` is int32 or int64. dtype(np.dtype|str, optional): Data type of output Tensor, it supports bool, float16, float32, float64, int32 and int64. Default: if None, the date type is float32. name(str, optional): The default value is None. Normally there is no need for user to set this property. For more information, please refer to :ref:`api_guide_Name`. Returns: Tensor: A tensor of data type :attr:`dtype` with shape :attr:`shape` and all elements set to 0. Examples: .. code-block:: python import paddle data = paddle.zeros(shape=[3, 2], dtype='float32') # [[0. 0.] # [0. 0.] # [0. 0.]] data = paddle.zeros(shape=[2, 2]) # [[0. 0.] # [0. 0.]] # shape is a Tensor shape = paddle.full(shape=[2], dtype='int32', fill_value=2) data3 = paddle.zeros(shape=shape, dtype='int32') # [[0 0] # [0 0]] """ if dtype is None: dtype = 'float32' return fill_constant(value=0.0, shape=shape, dtype=dtype, name=name) def zeros_like(x, dtype=None, name=None): """ Returns a Tensor filled with the value 0, with the same shape and data type (use ``dtype`` if ``dtype`` is not None) as ``x``. Args: x(Tensor): The input tensor which specifies shape and dtype. The dtype of ``x`` can be bool, float16, float32, float64, int32, int64. dtype(str|np.dtype, optional): The data type of the output tensor. Supported data types: bool, float16, float32, float64, int32, int64. If ``dtype`` is None, the data type is the same as ``x``. Default is None. name (str, optional): For details, please refer to :ref:`api_guide_Name`. Generally, no setting is required. Default: None. Returns: Tensor: A Tensor filled with the value 0, with the same shape and data type (use ``dtype`` if ``dtype`` is not None) as ``x``. Examples: .. code-block:: python import paddle x = paddle.to_tensor([1, 2, 3]) out1 = paddle.zeros_like(x) # [0., 0., 0.] out2 = paddle.zeros_like(x, dtype='int32') # [0, 0, 0] """ return full_like(x=x, fill_value=0, dtype=dtype, name=name) def eye(num_rows, num_columns=None, dtype=None, name=None): """ This function constructs 2-D Tensor with ones on the diagonal and zeros elsewhere. Args: num_rows(int): the number of rows in each batch Tensor. num_columns(int, optional): the number of columns in each batch Tensor. If None, default: num_rows. dtype(np.dtype|str, optional): The data type of the returned Tensor. It should be int32, int64, float16, float32, float64. Default: if None, the data type is float32. name(str, optional): For details, please refer to :ref:`api_guide_Name`. Generally, no setting is required. Default: None. Returns: Tensor: An identity Tensor or LoDTensor of shape [num_rows, num_columns]. Examples: .. code-block:: python import paddle data = paddle.eye(3, dtype='int32') # [[1 0 0] # [0 1 0] # [0 0 1]] data = paddle.eye(2, 3, dtype='int32') # [[1 0 0] # [0 1 0]] """ if dtype is None: dtype = 'float32' if num_columns is None: num_columns = num_rows if not isinstance(dtype, core.VarDesc.VarType): dtype = convert_np_dtype_to_dtype_(dtype) if num_columns is not None: if not isinstance(num_columns, int) or num_columns < 0: raise TypeError("num_columns should be a non-negative int") else: num_columns = num_rows if _non_static_mode(): if in_dygraph_mode(): out = _C_ops.final_state_eye(num_rows, num_columns, dtype, _current_expected_place()) elif _in_legacy_dygraph(): out = _C_ops.eye('dtype', dtype, 'num_rows', num_rows, 'num_columns', num_columns) else: helper = LayerHelper("eye", **locals()) check_dtype(dtype, 'dtype', ['float16', 'float32', 'float64', 'int32', 'int64'], 'eye') if not isinstance(num_rows, int) or num_rows < 0: raise TypeError("num_rows should be a non-negative int") out = helper.create_variable_for_type_inference(dtype=dtype) helper.append_op(type='eye', inputs={}, outputs={'Out': [out]}, attrs={ 'num_rows': num_rows, 'num_columns': num_columns, 'dtype': dtype }, stop_gradient=True) out.stop_gradient = True return out def full(shape, fill_value, dtype=None, name=None): """ Return a Tensor with the ``fill_value`` which size is same as ``shape``. Args: shape(list|tuple|Tensor): Shape of the Tensor to be created. The data type is ``int32`` or ``int64`` . If ``shape`` is a list or tuple, the elements of it should be integers or Tensors with shape [1]. If ``shape`` is an Tensor, it should be an 1-D Tensor. fill_value(bool|float|int|Tensor): The constant value used to initialize the Tensor to be created. If ``fill_value`` is an Tensor, it must be an 1-D Tensor. dtype(np.dtype|str, optional): Data type of the output Tensor which can be float16, float32, float64, int32, int64, if dytpe is `None`, the data type of created Tensor is `float32`. name (str, optional): For details, please refer to :ref:`api_guide_Name`. Generally, no setting is required. Default: None. Returns: Tensor: Tensor which is created according to ``shape``, ``fill_value`` and ``dtype``. Examples: .. code-block:: python :name: code-example1 import paddle data1 = paddle.full(shape=[2,1], fill_value=0, dtype='int64') #[[0] # [0]] # attr shape is a list which contains Tensor. positive_2 = paddle.full([1], 2, "int32") data3 = paddle.full(shape=[1, positive_2], dtype='float32', fill_value=1.5) # [[1.5 1.5]] # attr shape is a Tensor. shape = paddle.full([2], 2, "int32") data4 = paddle.full(shape=shape, dtype='bool', fill_value=True) # [[True True] # [True True]] # attr fill_value is a Tensor. val = paddle.full([1], 2.0, "float32") data5 = paddle.full(shape=[2,1], fill_value=val, dtype='float32') # [[2.0] # [2.0]] """ if dtype is None: dtype = 'float32' return fill_constant(shape=shape, dtype=dtype, value=fill_value, name=name) def arange(start=0, end=None, step=1, dtype=None, name=None): """ Returns a 1-D Tensor with spaced values within a given interval. Values are generated into the half-open interval [``start``, ``end``) with the ``step``. (the interval including ``start`` but excluding ``end``). If ``dtype`` is float32 or float64, we advise adding a small epsilon to ``end`` to avoid floating point rounding errors when comparing against ``end``. Parameters: start(float|int|Tensor): Start of interval. The interval includes this value. If ``end`` is None, the half-open interval is [0, ``start``). If ``start`` is a Tensor, it is a 1-D Tensor with shape [1], with data type int32, int64, float32, float64. Default is 0. end(float|int|Tensor, optional): End of interval. The interval does not include this value. If ``end`` is a Tensor, it is a 1-D Tensor with shape [1], with data type int32, int64, float32, float64. If ``end`` is None, the half-open interval is [0, ``start``). Default is None. step(float|int|Tensor, optional): Spacing between values. For any out, it is the istance between two adjacent values, out[i+1] - out[i]. If ``step`` is a Tensor, it is a 1-D Tensor with shape [1], with data type int32, int64, float32, float64. Default is 1. dtype(str|np.dtype, optional): The data type of the output tensor. Supported data types: int32, int64, float32, float64. If ``dytpe`` is None, the data type is float32. Default is None. name (str, optional): For details, please refer to :ref:`api_guide_Name`. Generally, no setting is required. Default: None. Returns: Tensor: A 1-D Tensor with values from the interval [``start``, ``end``) taken with common difference ``step`` beginning from ``start``. Its data type is set by ``dtype``. Examples: .. code-block:: python import paddle out1 = paddle.arange(5) # [0, 1, 2, 3, 4] out2 = paddle.arange(3, 9, 2.0) # [3, 5, 7] # use 4.999 instead of 5.0 to avoid floating point rounding errors out3 = paddle.arange(4.999, dtype='float32') # [0., 1., 2., 3., 4.] start_var = paddle.to_tensor([3]) out4 = paddle.arange(start_var, 7) # [3, 4, 5, 6] """ if dtype is None: dtype = 'int64' if end is None: end = start start = 0 out_shape = None if not isinstance(start, Variable) and not isinstance( end, Variable) and not isinstance(step, Variable): out_shape = [int(math.ceil((end - start) / step))] if not isinstance(dtype, core.VarDesc.VarType): dtype = convert_np_dtype_to_dtype_(dtype) if not isinstance(start, Variable): with device_guard("cpu"): start = fill_constant([1], dtype, start, force_cpu=True) elif start.dtype != dtype: start = paddle.cast(start, dtype) if not isinstance(end, Variable): with device_guard("cpu"): end = fill_constant([1], dtype, end, force_cpu=True) elif end.dtype != dtype: end = paddle.cast(end, dtype) if not isinstance(step, Variable): with device_guard("cpu"): step = fill_constant([1], dtype, step, force_cpu=True) elif step.dtype != dtype: step = paddle.cast(step, dtype) if in_dygraph_mode(): return _C_ops.final_state_arange(start, end, step, dtype, _current_expected_place()) if _in_legacy_dygraph(): out = _C_ops.range(start, end, step) out.stop_gradient = True return out check_dtype(dtype, 'dtype', ['float32', 'float64', 'int32', 'int64'], 'range/arange') helper = LayerHelper('range', **locals()) out = helper.create_variable_for_type_inference(dtype, shape=out_shape) helper.append_op(type='range', inputs={ 'Start': start, 'End': end, 'Step': step }, outputs={'Out': out}) out.stop_gradient = True if out_shape is not None: out.desc.set_shape(out_shape) return out def _tril_triu_op(helper): """Base op of tril_op and triu_op """ op_type = helper.layer_type x = helper.kwargs.get('x', None) assert x is not None, 'x cannot be None in {}'.format(op_type) check_variable_and_dtype( x, 'x', ['float16', 'float32', 'float64', 'int32', 'int64'], op_type) if len(x.shape) < 2: raise ValueError("x shape in {} must be at least 2-D".format(op_type)) diagonal = helper.kwargs.get('diagonal', 0) if not isinstance(diagonal, (int, )): raise TypeError("diagonal in {} must be a python Int".format(op_type)) name = helper.kwargs.get('name', None) if name is None: out = helper.create_variable_for_type_inference(dtype=x.dtype) else: out = helper.create_variable(name=name, dtype=x.dtype, persistable=False) helper.append_op( type="tril_triu", inputs={"X": x}, attrs={ "diagonal": diagonal, "lower": True if op_type == 'tril' else False, }, outputs={"Out": out}, ) return out def tril(x, diagonal=0, name=None): r""" Returns the lower triangular part of a matrix (2-D tensor) or batch of matrices :attr:`x`, the other elements of the result tensor are set to 0. The lower triangular part of the matrix is defined as the elements on and below the diagonal. Args: x (Tensor): The input x which is a Tensor. Support data types: ``bool``, ``float64``, ``float32``, ``int32``, ``int64``. diagonal (int, optional): The diagonal to consider, default value is 0. If :attr:`diagonal` = 0, all elements on and below the main diagonal are retained. A positive value includes just as many diagonals above the main diagonal, and similarly a negative value excludes just as many diagonals below the main diagonal. The main diagonal are the set of indices :math:`\{(i, i)\}` for :math:`i \in [0, \min\{d_{1}, d_{2}\} - 1]` where :math:`d_{1}, d_{2}` are the dimensions of the matrix. name (str, optional): For details, please refer to :ref:`api_guide_Name`. Generally, no setting is required. Default: None. Returns: Tensor: Results of lower triangular operation by the specified diagonal of input tensor x, it's data type is the same as x's Tensor. Examples: .. code-block:: python import paddle data = paddle.arange(1, 13, dtype="int64").reshape([3,-1]) # Tensor(shape=[3, 4], dtype=int64, place=Place(cpu), stop_gradient=True, # [[1 , 2 , 3 , 4 ], # [5 , 6 , 7 , 8 ], # [9 , 10, 11, 12]]) tril1 = paddle.tril(data) # Tensor(shape=[3, 4], dtype=int64, place=Place(cpu), stop_gradient=True, # [[1 , 0 , 0 , 0 ], # [5 , 6 , 0 , 0 ], # [9 , 10, 11, 0 ]]) # example 2, positive diagonal value tril2 = paddle.tril(data, diagonal=2) # Tensor(shape=[3, 4], dtype=int64, place=Place(cpu), stop_gradient=True, # [[1 , 2 , 3 , 0 ], # [5 , 6 , 7 , 8 ], # [9 , 10, 11, 12]]) # example 3, negative diagonal value tril3 = paddle.tril(data, diagonal=-1) # Tensor(shape=[3, 4], dtype=int64, place=Place(cpu), stop_gradient=True, # [[0 , 0 , 0 , 0 ], # [5 , 0 , 0 , 0 ], # [9 , 10, 0 , 0 ]]) """ if in_dygraph_mode(): return _C_ops.final_state_tril_triu(x, diagonal, True) if _in_legacy_dygraph(): op = getattr(_C_ops, 'tril_triu') return op(x, 'diagonal', diagonal, "lower", True) return _tril_triu_op(LayerHelper('tril', **locals())) def triu(x, diagonal=0, name=None): r""" Return the upper triangular part of a matrix (2-D tensor) or batch of matrices :attr:`x`, the other elements of the result tensor are set to 0. The upper triangular part of the matrix is defined as the elements on and above the diagonal. Args: x (Tensor): The input x which is a Tensor. Support data types: ``float64``, ``float32``, ``int32``, ``int64``. diagonal (int, optional): The diagonal to consider, default value is 0. If :attr:`diagonal` = 0, all elements on and above the main diagonal are retained. A positive value excludes just as many diagonals above the main diagonal, and similarly a negative value includes just as many diagonals below the main diagonal. The main diagonal are the set of indices :math:`\{(i, i)\}` for :math:`i \in [0, \min\{d_{1}, d_{2}\} - 1]` where :math:`d_{1}, d_{2}` are the dimensions of the matrix. name (str, optional): For details, please refer to :ref:`api_guide_Name`. Generally, no setting is required. Default: None. Returns: Tensor: Results of upper triangular operation by the specified diagonal of input tensor x, it's data type is the same as x's Tensor. Examples: .. code-block:: python import numpy as np import paddle data = np.arange(1, 13, dtype="int64").reshape(3,-1) # array([[ 1, 2, 3, 4], # [ 5, 6, 7, 8], # [ 9, 10, 11, 12]]) # example 1, default diagonal x = paddle.to_tensor(data) triu1 = paddle.tensor.triu(x) # array([[ 1, 2, 3, 4], # [ 0, 6, 7, 8], # [ 0, 0, 11, 12]]) # example 2, positive diagonal value triu2 = paddle.tensor.triu(x, diagonal=2) # array([[0, 0, 3, 4], # [0, 0, 0, 8], # [0, 0, 0, 0]]) # example 3, negative diagonal value triu3 = paddle.tensor.triu(x, diagonal=-1) # array([[ 1, 2, 3, 4], # [ 5, 6, 7, 8], # [ 0, 10, 11, 12]]) """ if in_dygraph_mode(): return _C_ops.final_state_tril_triu(x, diagonal, False) if _in_legacy_dygraph(): op = getattr(_C_ops, 'tril_triu') return op(x, 'diagonal', diagonal, "lower", False) return _tril_triu_op(LayerHelper('triu', **locals())) def meshgrid(*args, **kwargs): """ Takes a list of N tensors as input *args, each of which is 1-dimensional vector, and creates N-dimensional grids. Args: *args(Tensor|list of Tensor) : tensors (tuple(list) of tensor): the shapes of input k tensors are (N1,), (N2,),..., (Nk,). Support data types: ``float64``, ``float32``, ``int32``, ``int64``. **kwargs (optional): Currently, only accept name in **kwargs The default value is None. Normally there is no need for user to set this property. For more information, please refer to :ref:`api_guide_Name`. Returns: Tensor: k tensors. The shape of each tensor is (N1, N2, ..., Nk) Examples: .. code-block:: python import paddle x = paddle.randint(low=0, high=100, shape=[100]) y = paddle.randint(low=0, high=100, shape=[200]) grid_x, grid_y = paddle.meshgrid(x, y) print(grid_x.shape) print(grid_y.shape) #the shape of res_1 is (100, 200) #the shape of res_2 is (100, 200) """ if len(args) == 1 and isinstance(args[0], (list, tuple)): args = args[0] if _in_legacy_dygraph(): num = len(args) out = _C_ops.meshgrid(list(args), num) return out if in_dygraph_mode(): return _C_ops.final_state_meshgrid(list(args)) name = kwargs.get("name", None) helper = LayerHelper('meshgrid', **locals()) if not isinstance(args, (list, tuple)): raise TypeError("The type of input args in meshgrid should be list.") for id, input_ in enumerate(args): check_dtype(input_.dtype, 'create data type', ['float16', 'float32', 'float64', 'int32', 'int64'], 'meshgrid') num = len(args) out = [ helper.create_variable_for_type_inference(dtype=args[i].dtype) for i in range(num) ] helper.append_op(type='meshgrid', inputs={'X': list(args)}, outputs={'Out': out}) return out def diagflat(x, offset=0, name=None): """ If ``x`` is a vector (1-D tensor), a 2-D square tensor with the elements of ``x`` as the diagonal is returned. If ``x`` is a tensor (more than 1-D), a 2-D square tensor with the elements of flattened ``x`` as the diagonal is returned. The argument ``offset`` controls the diagonal offset. If ``offset`` = 0, it is the main diagonal. If ``offset`` > 0, it is superdiagonal. If ``offset`` < 0, it is subdiagonal. Args: x (Tensor): The input tensor. It can be any shape. Its data type should be float32, float64, int32, int64. offset (int, optional): The diagonal offset. A positive value represents superdiagonal, 0 represents the main diagonal, and a negative value represents subdiagonal. Default: 0 (main diagonal). name (str, optional): For details, please refer to :ref:`api_guide_Name`. Generally, no setting is required. Default: None. Returns: Tensor, a square matrix. The output data type is the same as input data type. Examples: .. code-block:: python import paddle x = paddle.to_tensor([1, 2, 3]) y = paddle.diagflat(x) print(y.numpy()) # [[1 0 0] # [0 2 0] # [0 0 3]] y = paddle.diagflat(x, offset=1) print(y.numpy()) # [[0 1 0 0] # [0 0 2 0] # [0 0 0 3] # [0 0 0 0]] y = paddle.diagflat(x, offset=-1) print(y.numpy()) # [[0 0 0 0] # [1 0 0 0] # [0 2 0 0] # [0 0 3 0]] .. code-block:: python import paddle x = paddle.to_tensor([[1, 2], [3, 4]]) y = paddle.diagflat(x) print(y.numpy()) # [[1 0 0 0] # [0 2 0 0] # [0 0 3 0] # [0 0 0 4]] y = paddle.diagflat(x, offset=1) print(y.numpy()) # [[0 1 0 0 0] # [0 0 2 0 0] # [0 0 0 3 0] # [0 0 0 0 4] # [0 0 0 0 0]] y = paddle.diagflat(x, offset=-1) print(y.numpy()) # [[0 0 0 0 0] # [1 0 0 0 0] # [0 2 0 0 0] # [0 0 3 0 0] # [0 0 0 4 0]] """ padding_value = 0 if paddle.in_dynamic_mode(): if len(x.shape) == 1: return _C_ops.diag_v2(x, "offset", offset, "padding_value", padding_value) else: y, _ = _C_ops.flatten_contiguous_range(x, "start_axis", 0, "stop_axis", -1) return _C_ops.diag_v2(y, "offset", offset, "padding_value", padding_value) check_type(x, 'x', (Variable), 'diagflat') check_dtype(x.dtype, 'x', ['float32', 'float64', 'int32', 'int64'], 'diagflat') check_type(offset, 'offset', (int), 'diagflat') helper = LayerHelper("diagflat", **locals()) out1 = helper.create_variable_for_type_inference(dtype=x.dtype) out1_shape = helper.create_variable_for_type_inference(x.dtype) out2 = helper.create_variable_for_type_inference(dtype=x.dtype) if len(x.shape) == 1: helper.append_op(type='diag_v2', inputs={'X': x}, outputs={'Out': out2}, attrs={ 'offset': offset, 'padding_value': padding_value }) else: helper.append_op(type='flatten_contiguous_range', inputs={'X': x}, outputs={ 'Out': out1, 'XShape': out1_shape }, attrs={ 'start_axis': 0, 'stop_axis': -1 }) out1.stop_gradient = True helper.append_op(type='diag_v2', inputs={'X': out1}, outputs={'Out': out2}, attrs={ 'offset': offset, 'padding_value': padding_value }) out2.stop_gradient = True return out2 def diag(x, offset=0, padding_value=0, name=None): """ If ``x`` is a vector (1-D tensor), a 2-D square tensor with the elements of ``x`` as the diagonal is returned. If ``x`` is a matrix (2-D tensor), a 1-D tensor with the diagonal elements of ``x`` is returned. The argument ``offset`` controls the diagonal offset: If ``offset`` = 0, it is the main diagonal. If ``offset`` > 0, it is superdiagonal. If ``offset`` < 0, it is subdiagonal. Args: x (Tensor): The input tensor. Its shape is either 1-D or 2-D. Its data type should be float32, float64, int32, int64. offset (int, optional): The diagonal offset. A positive value represents superdiagonal, 0 represents the main diagonal, and a negative value represents subdiagonal. padding_value (int|float, optional): Use this value to fill the area outside the specified diagonal band. Only takes effect when the input is a 1-D Tensor. The default value is 0. name (str, optional): For details, please refer to :ref:`api_guide_Name`. Generally, no setting is required. Default: None. Returns: Tensor, a square matrix or a vector. The output data type is the same as input data type. Examples: .. code-block:: python import paddle paddle.disable_static() x = paddle.to_tensor([1, 2, 3]) y = paddle.diag(x) print(y.numpy()) # [[1 0 0] # [0 2 0] # [0 0 3]] y = paddle.diag(x, offset=1) print(y.numpy()) # [[0 1 0 0] # [0 0 2 0] # [0 0 0 3] # [0 0 0 0]] y = paddle.diag(x, padding_value=6) print(y.numpy()) # [[1 6 6] # [6 2 6] # [6 6 3]] .. code-block:: python import paddle paddle.disable_static() x = paddle.to_tensor([[1, 2, 3], [4, 5, 6]]) y = paddle.diag(x) print(y.numpy()) # [1 5] y = paddle.diag(x, offset=1) print(y.numpy()) # [2 6] y = paddle.diag(x, offset=-1) print(y.numpy()) # [4] """ if in_dygraph_mode(): return _C_ops.final_state_diag(x, offset, padding_value) else: if _in_legacy_dygraph(): return _C_ops.diag_v2(x, "offset", offset, "padding_value", padding_value) else: check_type(x, 'x', (Variable), 'diag_v2') check_dtype(x.dtype, 'x', ['float32', 'float64', 'int32', 'int64'], 'diag_v2') check_type(offset, 'offset', (int), 'diag_v2') check_type(padding_value, 'padding_value', (int, float), 'diag_v2') if len(x.shape) != 1 and len(x.shape) != 2: raise ValueError( "The dimension of input x must be either 1 or 2, but received {}" .format(len(x.shape))) helper = LayerHelper("diag_v2", **locals()) out = helper.create_variable_for_type_inference(dtype=x.dtype) helper.append_op(type='diag_v2', inputs={'X': x}, outputs={'Out': out}, attrs={ 'offset': offset, 'padding_value': padding_value }) out.stop_gradient = True return out def empty(shape, dtype=None, name=None): """ Returns a Tensor with uninitialized data which size is same as ``shape``. Args: shape(list|tuple|Tensor): Shape of the Tensor to be created. The data type of dimension of shape is ``int32`` or ``int64`` . If ``shape`` is a list or tuple, the elements of it should be integers or Tensors with shape [1]. If ``shape`` is an Tensor, it should be an 1-D Tensor. dtype(np.dtype|str, optional): Data type of the output Tensor which can be bool, float16, float32, float64, int32, int64, if dytpe is `None`, the data type of created Tensor use global default dtype (see ``get_default_dtype`` for details). name(str, optional): For details, please refer to :ref:`api_guide_Name`. Generally, no setting is required. Default: None. Returns: Tensor: Tensor which is created according to ``shape`` and ``dtype``, and is uninitialized. Examples: .. code-block:: python import paddle paddle.set_device("cpu") # and use cpu device # example 1: argument ``shape`` is a list which doesn't contain Tensor. data1 = paddle.empty(shape=[2, 3], dtype='float32') print(data1) # Tensor(shape=[2, 3], dtype=float32, place=Place(cpu), stop_gradient=True, # [[0.00000000, 0. , 0.00000000], # [0. , 0.29652897, 0.09356152]]) # uninitialized # example 2: argument ``shape`` is a Tensor, the data type must be int64 or int32. shape_data = paddle.to_tensor([2, 3]).astype('int32') data2 = paddle.empty(shape=shape_data, dtype='float32') print(data2) # Tensor(shape=[2, 3], dtype=float32, place=Place(cpu), stop_gradient=True, # [[-0.50543123, -0.09872390, -0.92634487], # [-0.51007903, -0.02454148, 1.29315734]]) # uninitialized # example 3: argument ``shape`` is a list which contains Tensor. dim2 = paddle.to_tensor([3]).astype('int32') data3 = paddle.empty(shape=[2, dim2], dtype='float32') print(data3) # Tensor(shape=[2, 3], dtype=float32, place=Place(cpu), stop_gradient=True, # [[ 0.00000000, 0. , -0.92634487], # [-0.51007903, -0.02454148, 1.29315734]]) # uninitialized """ if dtype is None: dtype = paddle.get_default_dtype() dtype = convert_dtype(dtype) if paddle.in_dynamic_mode(): shape = utils.convert_shape_to_list(shape) out = _C_ops.empty('shape', shape, 'dtype', convert_np_dtype_to_dtype_(dtype)) out.stop_gradient = True return out helper = LayerHelper("empty", **locals()) inputs = {} check_dtype(dtype, 'dtype', ['bool', 'float16', 'float32', 'float64', 'int32', 'int64'], 'empty') check_type(shape, 'shape', (Variable, list, tuple), 'empty') if isinstance(shape, Variable): check_dtype(shape.dtype, 'shape', ['int32', 'int64'], 'empty') attrs = {} utils.get_shape_tensor_inputs(inputs=inputs, attrs=attrs, shape=shape, op_type='empty') out = helper.create_variable_for_type_inference(dtype=dtype) attrs['dtype'] = convert_np_dtype_to_dtype_(dtype) helper.append_op(type='empty', inputs=inputs, outputs={'Out': [out]}, attrs=attrs, stop_gradient=True) out.stop_gradient = True return out def empty_like(x, dtype=None, name=None): """ Returns a Tensor with uninitialized data which has identical shape of ``x`` and ``dtype``. If the ``dtype`` is None, the data type of Tensor is same with ``x``. Args: x(Tensor): The input tensor which specifies shape and data type. The data type can be bool, float16, float32, float64, int32, int64. dtype(np.dtype|str, optional): The data type of output. The data type can be one of bool, float16, float32, float64, int32, int64. The default value is None, which means the output data type is the same as input. name(str, optional): For details, please refer to :ref:`api_guide_Name`. Generally, no setting is required. Default: None. Returns: Tensor: Tensor which is created according to ``x`` and ``dtype``, and is uninitialized. Examples: .. code-block:: python import paddle paddle.set_device("cpu") # and use cpu device x = paddle.randn([2, 3], 'float32') output = paddle.empty_like(x) #[[1.8491974e+20 1.8037303e+28 1.7443726e+28] # uninitialized # [4.9640171e+28 3.0186127e+32 5.6715899e-11]] # uninitialized """ if dtype is None: dtype = x.dtype dtype = convert_dtype(dtype) if paddle.in_dynamic_mode(): out = _C_ops.empty('shape', x.shape, 'dtype', convert_np_dtype_to_dtype_(dtype)) out.stop_gradient = True return out helper = LayerHelper("empty_like", **locals()) check_variable_and_dtype( x, 'x', ['bool', 'float16', 'float32', 'float64', 'int32', 'int64'], 'empty_like') check_dtype(dtype, 'dtype', ['bool', 'float16', 'float32', 'float64', 'int32', 'int64'], 'empty_like') out = helper.create_variable_for_type_inference(dtype=dtype) inputs = {} attrs = {} attrs['dtype'] = convert_np_dtype_to_dtype_(dtype) shape = paddle.shape(x) utils.get_shape_tensor_inputs(inputs=inputs, attrs=attrs, shape=shape, op_type='empty_like') helper.append_op(type='empty', inputs=inputs, outputs={'Out': [out]}, attrs=attrs, stop_gradient=True) out.stop_gradient = True return out def assign(x, output=None): """ Copy value of the :attr:`x` to the :attr:`output`. Parameters: x (Tensor|np.ndarray|list|tuple|scalar): A Tensor, numpy ndarray, tuple/list of scalar, or scalar. Its data type can be float16, float32, float64, int32, int64 or bool. Note: the float64 data will be converted to float32 because of current platform protobuf data limitation. output (Tensor, optional): A Tensor. If :attr:`output` is None, a new Tensor will be created as :attr:`output`. Default: None. Returns: Tensor: A Tensor with the same shape, data type and value as :attr:`x`. Examples: .. code-block:: python :name: assign-example import paddle import numpy as np data = paddle.full(shape=[3, 2], fill_value=2.5, dtype='float64') # [[2.5, 2.5], [2.5, 2.5], [2.5, 2.5]] array = np.array([[1, 1], [3, 4], [1, 3]]).astype(np.int64) result1 = paddle.zeros(shape=[3, 3], dtype='float32') paddle.assign(array, result1) # result1 = [[1, 1], [3 4], [1, 3]] result2 = paddle.assign(data) # result2 = [[2.5, 2.5], [2.5, 2.5], [2.5, 2.5]] result3 = paddle.assign(np.array([[2.5, 2.5], [2.5, 2.5], [2.5, 2.5]], dtype='float32')) # result3 = [[2.5, 2.5], [2.5, 2.5], [2.5, 2.5]] """ input = x helper = LayerHelper('assign', **locals()) check_type(input, 'input', (Variable, np.ndarray, list, tuple, float, int, bool), 'assign') is_inplace = True if output is not None else False if np.isscalar(input) and not isinstance(input, str): input = np.array([input]) elif isinstance(input, (list, tuple)): input = np.array(input) # NOTE(Aurelius84): Why we judge core.VarBase? # In case of @to_static, a VarBase can be as input of `assign`, # but _non_static_mode()==False under @to_static, which means # isinstance(VarBase, Variable) == False. It will cause return None # after this api. if isinstance(input, (Variable, core.VarBase)): if in_dygraph_mode(): if output is None: output = _C_ops.final_state_assign(input) else: _C_ops.final_state_assign_out_(input, output) elif _in_legacy_dygraph(): if output is None: output = core.VarBase() _C_ops.assign(input, output) else: check_dtype(input.dtype, 'input', [ 'float16', 'uint16', 'float32', 'float64', 'int32', 'int64', 'uint8', 'bool' ], 'assign', '(When the type of input in assign is Variable.)') if output is None: output = helper.create_variable_for_type_inference( dtype=input.dtype) helper.append_op(type='assign', inputs={'X': [input]}, outputs={'Out': [output]}) elif isinstance(input, np.ndarray): # Not support [var, var, ...] currently. if len(input.shape) > 0 and any(isinstance(x, Variable) for x in input): raise TypeError( "Required type(input) numpy.ndarray, but found `list(Variable)` in input." ) dtype = convert_np_dtype_to_dtype_(input.dtype) if dtype == core.VarDesc.VarType.FP64: # Setting FP64 numpy data is not supported in Paddle, so we # use FP32 here warnings.warn( "paddle.assign doesn't support float64 input now due " "to current platform protobuf data limitation, we convert " "it to float32") dtype = core.VarDesc.VarType.FP32 if dtype == core.VarDesc.VarType.BOOL: value_name = "bool_values" values = [int(v) for v in input.flat] elif dtype == core.VarDesc.VarType.FP32: value_name = "fp32_values" values = [float(v) for v in input.flat] elif dtype == core.VarDesc.VarType.INT32: value_name = "int32_values" values = [int(v) for v in input.flat] elif dtype == core.VarDesc.VarType.INT64: value_name = "int64_values" values = [int(v) for v in input.flat] else: raise TypeError( "When the type of 'input' in assign is numpy.ndarray, " "the data type of 'input' must be bool, float32, int32 or int64, but " "received %s." % convert_dtype(dtype)) if input.size > 1024 * 1024: raise ValueError("The size of input is too big. Please consider " "saving it to file and 'load_op' to load it") if output is None: output = helper.create_variable_for_type_inference( dtype=input.dtype) if _non_static_mode(): _C_ops.assign_value(output, 'shape', list(input.shape), 'dtype', dtype, value_name, values) else: helper.append_op(type='assign_value', outputs={'Out': [output]}, attrs={ 'dtype': dtype, 'shape': list(input.shape), value_name: values }) if is_inplace and _in_legacy_dygraph(): output._bump_inplace_version() return output def clone(x, name=None): """ Returns a copy of input Tensor. It will always have a Tensor copy. In addition, This function is derivable, so gradients will flow back from the output to input. Parameters: x (Tensor): The input Tensor. name(str, optional): For details, please refer to :ref:`api_guide_Name`. Generally, no setting is required. Default: None. Returns: A Tensor copied from ``input`` . Examples: .. code-block:: python import paddle x = paddle.ones([2]) x.stop_gradient = False clone_x = paddle.clone(x) y = clone_x**3 y.backward() print(clone_x.grad) # [3] print(x.grad) # [3] """ return x.clone() #NOTE(zhiqiu): not public def _memcpy(input, place=None, output=None): """ The OP copies the :attr:`input` to the :attr:`output`. NOTE: currently, only support CUDAPlace <-> CUDAPinnedPlace or NPUPlace <-> CPUPlace. Parameters: input (Tensor): A tensor. Its data type supports float16, float32, float64, int32, int64, and bool. device (Place): Target place for the output. output (Tensor, optional): A tensor. If :attr:`output` is None, a new tensor will be created as :attr:`output`. Default: None. Returns: Tensor: A tensor with the same shape, data type and value as :attr:`input`. Examples: .. code-block:: python import paddle import numpy as np data = paddle.full(shape=[3, 2], fill_value=2.5, dtype='float64') # [[2.5, 2.5], [2.5, 2.5], [2.5, 2.5]] result = paddle._memcpy(data, place=paddle.CPUPlace()) # result2 = [[2.5, 2.5], [2.5, 2.5], [2.5, 2.5]] """ helper = LayerHelper('memcpy', **locals()) check_type(input, 'input', (Variable), 'memcpy') if isinstance(input, (Variable, core.VarBase)): check_dtype(input.dtype, 'input', [ 'float16', 'uint16', 'float32', 'float64', 'int32', 'int64', 'uint8', 'bool' ], 'memcpy', '(When the type of input in memcpy is Variable.)') if output is None: output = helper.create_variable_for_type_inference(dtype=input.dtype) dst_place_type = -1 if place is None: dst_place_type = -1 else: p = core.Place() p.set_place(place) if p.is_cpu_place(): dst_place_type = 0 elif p.is_gpu_place(): dst_place_type = 1 elif p.is_cuda_pinned_place(): dst_place_type = 2 elif p.is_xpu_place(): dst_place_type = 3 elif p.is_npu_place(): dst_place_type = 4 attrs = {'dst_place_type': dst_place_type} helper.append_op(type='memcpy', inputs={'X': [input]}, outputs={'Out': [output]}, attrs=attrs) return output def complex(real, imag, name=None): """Return a compelx tensor given the real and image component. Args: real (Tensor): The real component. The data type should be 'float32' or 'float64'. imag (Tensor): The image component. The data type should be the same as ``real``. name (str, optional): For details, please refer to :ref:`api_guide_Name`. Generally, no setting is required. Default: None. Returns: Tensor: The output tensor. The data type is 'complex64' or 'complex128', with the same precision as ``real`` and ``imag``. **Note**: ``paddle.complex`` supports broadcasting. If you want know more about broadcasting, please refer to :ref:`user_guide_broadcasting` . Examples: .. code-block:: python import paddle x = paddle.arange(2, dtype=paddle.float32).unsqueeze(-1) y = paddle.arange(3, dtype=paddle.float32) z = paddle.complex(x, y) print(z.numpy()) # [[0.+0.j 0.+1.j 0.+2.j] # [1.+0.j 1.+1.j 1.+2.j]] """ if in_dygraph_mode(): return _C_ops.final_state_complex(real, imag) if paddle.in_dynamic_mode(): return paddle._C_ops.complex(real, imag) check_variable_and_dtype(real, 'real', ['float32', 'float64'], 'complex') check_variable_and_dtype(imag, 'imag', ['float32', 'float64'], 'complex') op_type = "complex" helper = LayerHelper(op_type, **locals()) inputs = {"X": real, "Y": imag} out = helper.create_variable_for_type_inference( dtype=_real_to_complex_dtype(real.dtype)) outputs = {"Out": out} attrs = {} helper.append_op(type=op_type, inputs=inputs, attrs=attrs, outputs=outputs) return out def tril_indices(row, col, offset=0, dtype='int64'): """ Return the indices of the lower triangular part of the 2-D matrix whose row and col is knowed.Indices are ordered based on row and then columns. The lower triangular part of the matrix is defined as the elements on and below the diagonal. Args: row (int): The input x which is a int number describe the number of row of the matrix. col (int): The input x which is a int number describe the number of col of the matrix. offset (int, optional): The offset to consider, default value is 0. - If offset = 0, all elements on and below the main diagonal are retained. - If offset > 0, include just as many diagonals above the main diagonal. - If offset < 0, excludes just as many diagonals below the main diagonal. dtype (int, optional): the data type of the output tensor, can be int32, int64. Returns: Tensor: Results of the indices of lower triangular part of a row * col matrix, where the first row contains row coordinates of and the second row contains column coordinates. Examples: .. code-block:: python :name: tril_indices-example import paddle # example 1, default offset value data1 = paddle.tril_indices(4,4,0) print(data1) # [[0, 1, 1, 2, 2, 2, 3, 3, 3, 3], # [0, 0, 1, 0, 1, 2, 0, 1, 2, 3]] # example 2, positive offset value data2 = paddle.tril_indices(4,4,2) print(data2) # [[0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3], # [0, 1, 2, 0, 1, 2, 3, 0, 1, 2, 3, 0, 1, 2, 3]] # example 3, negative offset value data3 = paddle.tril_indices(4,4,-1) print(data3) # [[ 1, 2, 2, 3, 3, 3], # [ 0, 0, 1, 0, 1, 2]] """ if not isinstance(row, int) or row < 0: raise TypeError("row should be a non-negative int") if col is not None: if not isinstance(col, int) or col < 0: raise TypeError("col should be a non-negative int") else: col = row if not isinstance(offset, int): raise TypeError("offset should be a int") if not isinstance(dtype, core.VarDesc.VarType): dtype = convert_np_dtype_to_dtype_(dtype) if in_dygraph_mode(): out = _C_ops.final_state_tril_indices(row, col, offset, dtype, _current_expected_place()) return out if _in_legacy_dygraph(): out = _C_ops.tril_indices('rows', row, 'cols', col, 'offset', offset, "dtype", dtype) return out else: helper = LayerHelper("tril_indices", **locals()) out = helper.create_variable_for_type_inference(dtype=dtype) helper.append_op(type='tril_indices', inputs={}, outputs={'out': [out]}, attrs={ 'rows': row, 'cols': col, 'offset': offset, 'dtype': dtype }) return out