// Copyright (c) 2021 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.

#include <pybind11/chrono.h>
#include <pybind11/complex.h>
#include <pybind11/functional.h>
#include <pybind11/stl.h>

#include <memory>
#include <string>
#include <vector>

#include "paddle/fluid/framework/attribute.h"
#include "paddle/fluid/framework/op_info.h"
#include "paddle/fluid/framework/op_registry.h"
#include "paddle/fluid/framework/variable.h"
#include "paddle/fluid/imperative/tracer.h"
#include "paddle/fluid/imperative/type_defs.h"
#include "paddle/fluid/pybind/imperative.h"
#include "paddle/fluid/pybind/op_function_common.h"

namespace py = pybind11;
namespace paddle {
namespace pybind {

class OpAttrTypeMap {
 public:
  static OpAttrTypeMap& Instance() {
    static OpAttrTypeMap g_op_attr_type_map;
    return g_op_attr_type_map;
  }

  std::unordered_map<
      std::string,
      std::unordered_map<std::string, paddle::framework::proto::AttrType>>&
  Map() {
    return ops_attrtype_map_;
  }

 private:
  OpAttrTypeMap() = default;
  std::unordered_map<
      std::string,
      std::unordered_map<std::string, paddle::framework::proto::AttrType>>
      ops_attrtype_map_;
};

extern PyTypeObject* g_varbase_pytype;
extern PyTypeObject* g_vartype_pytype;
extern PyTypeObject* g_blockdesc_pytype;
extern PyTypeObject* p_tensor_type;

bool PyObject_CheckBool(PyObject** obj) { return PyBool_Check(*obj); }

bool PyObject_CheckLongOrToLong(PyObject** obj) {
  if ((PyLong_Check(*obj) && !PyBool_Check(*obj)) ||
      PyObject_IsInstance(*obj, (PyObject*)g_vartype_pytype) ||  // NOLINT
      PyObject_IsInstance(*obj, (PyObject*)g_varbase_pytype) ||  // NOLINT
      PyObject_IsInstance(*obj, (PyObject*)p_tensor_type)) {     // NOLINT
    return true;
  }

  if (std::string(((PyTypeObject*)(*obj)->ob_type)->tp_name)  // NOLINT
          .find("numpy") != std::string::npos) {
    auto to = PyNumber_Long(*obj);
    if (to) {
      *obj = to;
      return true;
    }
  }

  return false;
}

bool PyObject_CheckFloatOrToFloat(PyObject** obj) {
  // sometimes users provide PyLong or numpy.int64 but attr is float
  if (PyFloat_Check(*obj) || PyLong_Check(*obj) ||
      PyObject_IsInstance(*obj, (PyObject*)g_varbase_pytype)) {  // NOLINT
    return true;
  }
  if (std::string(((PyTypeObject*)(*obj)->ob_type)->tp_name)  // NOLINT
          .find("numpy") != std::string::npos) {
    auto to = PyNumber_Float(*obj);
    if (to) {
      *obj = to;
      return true;
    }
  }
  return false;
}

bool PyObject_CheckString(PyObject* obj) { return PyUnicode_Check(obj); }

bool CastPyArg2Boolean(PyObject* obj, const std::string& op_type,
                       ssize_t arg_pos) {
  if (obj == Py_None) {
    return false;  // To be compatible with QA integration testing. Some
                   // test case pass in None.
  } else if (obj == Py_True) {
    return true;
  } else if (obj == Py_False) {
    return false;
  } else {
    PADDLE_THROW(platform::errors::InvalidArgument(
        "%s(): argument (position %d) must be "
        "bool, but got %s",
        op_type, arg_pos + 1,
        ((PyTypeObject*)obj->ob_type)->tp_name));  // NOLINT
  }

  return false;
}

void CastPyArg2AttrBoolean(PyObject* obj,
                           paddle::framework::AttributeMap& attrs,  // NOLINT
                           const std::string& key, const std::string& op_type,
                           ssize_t arg_pos) {
  attrs[key] = CastPyArg2Boolean(obj, op_type, arg_pos);
}

int CastPyArg2Int(PyObject* obj, const std::string& op_type, ssize_t arg_pos) {
  if (PyObject_CheckLongOrToLong(&obj)) {
    return (int)PyLong_AsLong(obj);  // NOLINT
  } else {
    PADDLE_THROW(platform::errors::InvalidArgument(
        "%s(): argument (position %d) must be "
        "int, but got %s",
        op_type, arg_pos + 1,
        ((PyTypeObject*)obj->ob_type)->tp_name));  // NOLINT
  }

  return 0;
}

void CastPyArg2AttrInt(PyObject* obj,
                       paddle::framework::AttributeMap& attrs,  // NOLINT
                       const std::string& key, const std::string& op_type,
                       ssize_t arg_pos) {
  attrs[key] = CastPyArg2Int(obj, op_type, arg_pos);
}

int64_t CastPyArg2Long(PyObject* obj, const std::string& op_type,
                       ssize_t arg_pos) {
  if (PyObject_CheckLongOrToLong(&obj)) {
    return (int64_t)PyLong_AsLongLong(obj);  // NOLINT
  } else {
    PADDLE_THROW(platform::errors::InvalidArgument(
        "%s(): argument (position %d) must be "
        "long, but got %s",
        op_type, arg_pos + 1,
        ((PyTypeObject*)obj->ob_type)->tp_name));  // NOLINT
  }

  return 0;
}

void CastPyArg2AttrLong(PyObject* obj,
                        paddle::framework::AttributeMap& attrs,  // NOLINT
                        const std::string& key, const std::string& op_type,
                        ssize_t arg_pos) {
  attrs[key] = CastPyArg2Long(obj, op_type, arg_pos);
}

float CastPyArg2Float(PyObject* obj, const std::string& op_type,
                      ssize_t arg_pos) {
  return static_cast<float>(CastPyArg2Double(obj, op_type, arg_pos));
}

double CastPyArg2Double(PyObject* obj, const std::string& op_type,
                        ssize_t arg_pos) {
  if (PyObject_CheckFloatOrToFloat(&obj)) {
    return PyFloat_AsDouble(obj);  // NOLINT
  } else {
    PADDLE_THROW(platform::errors::InvalidArgument(
        "%s(): argument (position %d) must be "
        "float, but got %s",
        op_type, arg_pos + 1,
        ((PyTypeObject*)obj->ob_type)->tp_name));  // NOLINT
  }

  return 0.0;
}

void CastPyArg2AttrFloat(PyObject* obj,
                         paddle::framework::AttributeMap& attrs,  // NOLINT
                         const std::string& key, const std::string& op_type,
                         ssize_t arg_pos) {
  attrs[key] = CastPyArg2Float(obj, op_type, arg_pos);
}

std::string CastPyArg2String(PyObject* obj, const std::string& op_type,
                             ssize_t arg_pos) {
  if (PyObject_CheckString(obj)) {
    Py_ssize_t size;
    const char* data;
    data = PyUnicode_AsUTF8AndSize(obj, &size);
    return std::string(data, (size_t)size);  // NOLINT
  } else {
    PADDLE_THROW(platform::errors::InvalidArgument(
        "%s(): argument (position %d) must be "
        "str, but got %s",
        op_type, arg_pos + 1,
        ((PyTypeObject*)obj->ob_type)->tp_name));  // NOLINT
  }

  return "";
}

void CastPyArg2AttrString(PyObject* obj,
                          paddle::framework::AttributeMap& attrs,  // NOLINT
                          const std::string& key, const std::string& op_type,
                          ssize_t arg_pos) {
  attrs[key] = CastPyArg2String(obj, op_type, arg_pos);
}

std::vector<bool> CastPyArg2Booleans(PyObject* obj, const std::string& op_type,
                                     ssize_t arg_pos) {
  std::vector<bool> value;
  if (PyList_Check(obj)) {
    Py_ssize_t len = PyList_Size(obj);
    PyObject* item = nullptr;
    for (Py_ssize_t i = 0; i < len; i++) {
      item = PyList_GetItem(obj, i);
      if (PyObject_CheckBool(&item)) {
        value.emplace_back(PyLong_AsLong(item));
      } else {
        PADDLE_THROW(platform::errors::InvalidArgument(
            "%s(): argument (position %d) must be "
            "list of bool, but got %s at pos %d",
            op_type, arg_pos + 1,
            ((PyTypeObject*)item->ob_type)->tp_name,  // NOLINT
            i));
      }
    }
  } else if (PyTuple_Check(obj)) {
    Py_ssize_t len = PyTuple_Size(obj);
    PyObject* item = nullptr;
    for (Py_ssize_t i = 0; i < len; i++) {
      item = PyTuple_GetItem(obj, i);
      if (PyObject_CheckBool(&item)) {
        value.emplace_back(PyLong_AsLong(item));
      } else {
        PADDLE_THROW(platform::errors::InvalidArgument(
            "%s(): argument (position %d) must be "
            "list of bool, but got %s at pos %d",
            op_type, arg_pos + 1,
            ((PyTypeObject*)item->ob_type)->tp_name,  // NOLINT
            i));
      }
    }
  } else {
    PADDLE_THROW(platform::errors::InvalidArgument(
        "%s(): argument (position %d) must be "
        "list or tuple, but got %s",
        op_type, arg_pos + 1,
        ((PyTypeObject*)obj->ob_type)->tp_name));  // NOLINT
  }

  return value;
}

void CastPyArg2AttrBooleans(PyObject* obj,
                            paddle::framework::AttributeMap& attrs,  // NOLINT
                            const std::string& key, const std::string& op_type,
                            ssize_t arg_pos) {
  attrs[key] = CastPyArg2Booleans(obj, op_type, arg_pos);
}

std::vector<int> CastPyArg2Ints(PyObject* obj, const std::string& op_type,
                                ssize_t arg_pos) {
  std::vector<int> value;
  if (PyList_Check(obj)) {
    Py_ssize_t len = PyList_Size(obj);
    value.reserve(len);
    PyObject* item = nullptr;
    for (Py_ssize_t i = 0; i < len; i++) {
      item = PyList_GetItem(obj, i);
      if (PyObject_CheckLongOrToLong(&item)) {
        value.emplace_back(PyLong_AsLong(item));
      } else {
        PADDLE_THROW(platform::errors::InvalidArgument(
            "%s(): argument (position %d) must be "
            "list of int, but got %s at pos %d",
            op_type, arg_pos + 1,
            ((PyTypeObject*)item->ob_type)->tp_name,  // NOLINT
            i));
      }
    }
  } else if (PyTuple_Check(obj)) {
    Py_ssize_t len = PyTuple_Size(obj);
    value.reserve(len);
    PyObject* item = nullptr;
    for (Py_ssize_t i = 0; i < len; i++) {
      item = PyTuple_GetItem(obj, i);
      if (PyObject_CheckLongOrToLong(&item)) {
        value.emplace_back(PyLong_AsLong(item));
      } else {
        PADDLE_THROW(platform::errors::InvalidArgument(
            "%s(): argument (position %d) must be "
            "list of int, but got %s at pos %d",
            op_type, arg_pos + 1,
            ((PyTypeObject*)item->ob_type)->tp_name,  // NOLINT
            i));
      }
    }
  } else if (PySequence_Check(obj)) {
    Py_ssize_t len = PySequence_Size(obj);
    value.reserve(len);
    PyObject* item = nullptr;
    for (Py_ssize_t i = 0; i < len; i++) {
      item = PySequence_GetItem(obj, i);
      if (PyObject_CheckLongOrToLong(&item)) {
        value.emplace_back(PyLong_AsLong(item));
      } else {
        PADDLE_THROW(platform::errors::InvalidArgument(
            "%s(): argument (position %d) must be "
            "list of int, but got %s at pos %d",
            op_type, arg_pos + 1,
            ((PyTypeObject*)item->ob_type)->tp_name,  // NOLINT
            i));
      }
    }
  } else {
    PADDLE_THROW(platform::errors::InvalidArgument(
        "%s(): argument (position %d) must be "
        "list or tuple, but got %s",
        op_type, arg_pos + 1,
        ((PyTypeObject*)obj->ob_type)->tp_name));  // NOLINT
  }

  return value;
}

void CastPyArg2AttrInts(PyObject* obj,
                        paddle::framework::AttributeMap& attrs,  // NOLINT
                        const std::string& key, const std::string& op_type,
                        ssize_t arg_pos) {
  attrs[key] = CastPyArg2Ints(obj, op_type, arg_pos);
}

std::vector<int64_t> CastPyArg2Longs(PyObject* obj, const std::string& op_type,
                                     ssize_t arg_pos) {
  std::vector<int64_t> value;
  if (PyList_Check(obj)) {
    Py_ssize_t len = PyList_Size(obj);
    PyObject* item = nullptr;
    for (Py_ssize_t i = 0; i < len; i++) {
      item = PyList_GetItem(obj, i);
      if (PyObject_CheckLongOrToLong(&item)) {
        value.emplace_back(PyLong_AsLong(item));
      } else {
        PADDLE_THROW(platform::errors::InvalidArgument(
            "%s(): argument (position %d) must be "
            "list of int, but got %s at pos %d",
            op_type, arg_pos + 1,
            ((PyTypeObject*)item->ob_type)->tp_name,  // NOLINT
            i));
      }
    }
  } else if (PyTuple_Check(obj)) {
    Py_ssize_t len = PyTuple_Size(obj);
    PyObject* item = nullptr;
    for (Py_ssize_t i = 0; i < len; i++) {
      item = PyTuple_GetItem(obj, i);
      if (PyObject_CheckLongOrToLong(&item)) {
        value.emplace_back(PyLong_AsLong(item));
      } else {
        PADDLE_THROW(platform::errors::InvalidArgument(
            "%s(): argument (position %d) must be "
            "list of int, but got %s at pos %d",
            op_type, arg_pos + 1,
            ((PyTypeObject*)item->ob_type)->tp_name,  // NOLINT
            i));
      }
    }
  } else if (PySequence_Check(obj)) {
    Py_ssize_t len = PySequence_Size(obj);
    PyObject* item = nullptr;
    for (Py_ssize_t i = 0; i < len; i++) {
      item = PySequence_GetItem(obj, i);
      if (PyObject_CheckLongOrToLong(&item)) {
        value.emplace_back(PyLong_AsLong(item));
      } else {
        PADDLE_THROW(platform::errors::InvalidArgument(
            "%s(): argument (position %d) must be "
            "list of int, but got %s at pos %d",
            op_type, arg_pos + 1,
            ((PyTypeObject*)item->ob_type)->tp_name,  // NOLINT
            i));
      }
    }
  } else {
    PADDLE_THROW(platform::errors::InvalidArgument(
        "%s(): argument (position %d) must be "
        "list or tuple, but got %s",
        op_type, arg_pos + 1,
        ((PyTypeObject*)obj->ob_type)->tp_name));  // NOLINT
  }

  return value;
}

void CastPyArg2AttrLongs(PyObject* obj,
                         paddle::framework::AttributeMap& attrs,  // NOLINT
                         const std::string& key, const std::string& op_type,
                         ssize_t arg_pos) {
  attrs[key] = CastPyArg2Longs(obj, op_type, arg_pos);
}

std::vector<float> CastPyArg2Floats(PyObject* obj, const std::string& op_type,
                                    ssize_t arg_pos) {
  std::vector<float> value;
  if (PyList_Check(obj)) {
    Py_ssize_t len = PyList_Size(obj);
    PyObject* item = nullptr;
    for (Py_ssize_t i = 0; i < len; i++) {
      item = PyList_GetItem(obj, i);
      if (PyObject_CheckFloatOrToFloat(&item)) {
        value.emplace_back(PyFloat_AsDouble(item));
      } else {
        PADDLE_THROW(platform::errors::InvalidArgument(
            "%s(): argument (position %d) must be "
            "list of float, but got %s at pos %d",
            op_type, arg_pos + 1,
            ((PyTypeObject*)item->ob_type)->tp_name,  // NOLINT
            i));
      }
    }
  } else if (PyTuple_Check(obj)) {
    Py_ssize_t len = PyTuple_Size(obj);
    PyObject* item = nullptr;
    for (Py_ssize_t i = 0; i < len; i++) {
      item = PyTuple_GetItem(obj, i);
      if (PyObject_CheckFloatOrToFloat(&item)) {
        value.emplace_back(PyFloat_AsDouble(item));
      } else {
        PADDLE_THROW(platform::errors::InvalidArgument(
            "%s(): argument (position %d) must be "
            "list of float, but got %s at pos %d",
            op_type, arg_pos + 1,
            ((PyTypeObject*)item->ob_type)->tp_name,  // NOLINT
            i));
      }
    }
  } else if (PySequence_Check(obj)) {
    Py_ssize_t len = PySequence_Size(obj);
    PyObject* item = nullptr;
    for (Py_ssize_t i = 0; i < len; i++) {
      item = PySequence_GetItem(obj, i);
      if (PyObject_CheckFloatOrToFloat(&item)) {
        value.emplace_back(PyFloat_AsDouble(item));
      } else {
        PADDLE_THROW(platform::errors::InvalidArgument(
            "%s(): argument (position %d) must be "
            "list of float, but got %s at pos %d",
            op_type, arg_pos + 1,
            ((PyTypeObject*)item->ob_type)->tp_name,  // NOLINT
            i));
      }
    }
  } else {
    PADDLE_THROW(platform::errors::InvalidArgument(
        "%s(): argument (position %d) must be "
        "list or tuple, but got %s",
        op_type, arg_pos + 1,
        ((PyTypeObject*)obj->ob_type)->tp_name));  // NOLINT
  }

  return value;
}

void CastPyArg2AttrFloats(PyObject* obj,
                          paddle::framework::AttributeMap& attrs,  // NOLINT
                          const std::string& key, const std::string& op_type,
                          ssize_t arg_pos) {
  attrs[key] = CastPyArg2Floats(obj, op_type, arg_pos);
}

std::vector<double> CastPyArg2Float64s(PyObject* obj,
                                       const std::string& op_type,
                                       ssize_t arg_pos) {
  std::vector<double> value;
  if (PyList_Check(obj)) {
    Py_ssize_t len = PyList_Size(obj);
    PyObject* item = nullptr;
    for (Py_ssize_t i = 0; i < len; i++) {
      item = PyList_GetItem(obj, i);
      if (PyObject_CheckFloatOrToFloat(&item)) {
        value.emplace_back(PyFloat_AsDouble(item));
      } else {
        PADDLE_THROW(platform::errors::InvalidArgument(
            "%s(): argument (position %d) must be "
            "list of float, but got %s at pos %d",
            op_type, arg_pos + 1,
            ((PyTypeObject*)item->ob_type)->tp_name,  // NOLINT
            i));
      }
    }
  } else if (PyTuple_Check(obj)) {
    Py_ssize_t len = PyTuple_Size(obj);
    PyObject* item = nullptr;
    for (Py_ssize_t i = 0; i < len; i++) {
      item = PyTuple_GetItem(obj, i);
      if (PyObject_CheckFloatOrToFloat(&item)) {
        value.emplace_back(PyFloat_AsDouble(item));
      } else {
        PADDLE_THROW(platform::errors::InvalidArgument(
            "%s(): argument (position %d) must be "
            "list of float, but got %s at pos %d",
            op_type, arg_pos + 1,
            ((PyTypeObject*)item->ob_type)->tp_name,  // NOLINT
            i));
      }
    }
  } else if (PySequence_Check(obj)) {
    Py_ssize_t len = PySequence_Size(obj);
    PyObject* item = nullptr;
    for (Py_ssize_t i = 0; i < len; i++) {
      item = PySequence_GetItem(obj, i);
      if (PyObject_CheckFloatOrToFloat(&item)) {
        value.emplace_back(PyFloat_AsDouble(item));
      } else {
        PADDLE_THROW(platform::errors::InvalidArgument(
            "%s(): argument (position %d) must be "
            "list of float, but got %s at pos %d",
            op_type, arg_pos + 1,
            ((PyTypeObject*)item->ob_type)->tp_name,  // NOLINT
            i));
      }
    }
  } else {
    PADDLE_THROW(platform::errors::InvalidArgument(
        "%s(): argument (position %d) must be "
        "list or tuple, but got %s",
        op_type, arg_pos + 1,
        ((PyTypeObject*)obj->ob_type)->tp_name));  // NOLINT
  }

  return value;
}

void CastPyArg2AttrFloat64s(PyObject* obj,
                            paddle::framework::AttributeMap& attrs,  // NOLINT
                            const std::string& key, const std::string& op_type,
                            ssize_t arg_pos) {
  attrs[key] = CastPyArg2Float64s(obj, op_type, arg_pos);
}

std::vector<std::string> CastPyArg2Strings(PyObject* obj,
                                           const std::string& op_type,
                                           ssize_t arg_pos) {
  std::vector<std::string> value;
  if (PyList_Check(obj)) {
    Py_ssize_t len = PyList_Size(obj);
    PyObject* item = nullptr;
    for (Py_ssize_t i = 0; i < len; i++) {
      item = PyList_GetItem(obj, i);
      if (PyObject_CheckString(item)) {
        Py_ssize_t size;
        const char* data;
        data = PyUnicode_AsUTF8AndSize(item, &size);
        value.emplace_back(std::string(data, (size_t)size));  // NOLINT
      } else {
        PADDLE_THROW(platform::errors::InvalidArgument(
            "%s(): argument (position %d) must be "
            "list of str, but got %s at pos %d",
            op_type, arg_pos + 1,
            ((PyTypeObject*)item->ob_type)->tp_name,  // NOLINT
            i));
      }
    }
  } else if (PyTuple_Check(obj)) {
    Py_ssize_t len = PyTuple_Size(obj);
    PyObject* item = nullptr;
    for (Py_ssize_t i = 0; i < len; i++) {
      item = PyTuple_GetItem(obj, i);
      if (PyObject_CheckString(item)) {
        Py_ssize_t size;
        const char* data;
        data = PyUnicode_AsUTF8AndSize(item, &size);
        value.emplace_back(std::string(data, (size_t)size));  // NOLINT
      } else {
        PADDLE_THROW(platform::errors::InvalidArgument(
            "%s(): argument (position %d) must be "
            "list of str, but got %s at pos %d",
            op_type, arg_pos + 1,
            ((PyTypeObject*)item->ob_type)->tp_name,  // NOLINT
            i));
      }
    }
  } else {
    PADDLE_THROW(platform::errors::InvalidArgument(
        "%s(): argument (position %d) must be "
        "list or tuple, but got %s",
        op_type, arg_pos + 1,
        ((PyTypeObject*)obj->ob_type)->tp_name));  // NOLINT
  }

  return value;
}

void CastPyArg2AttrStrings(PyObject* obj,
                           paddle::framework::AttributeMap& attrs,  // NOLINT
                           const std::string& key, const std::string& op_type,
                           ssize_t arg_pos) {
  attrs[key] = CastPyArg2Strings(obj, op_type, arg_pos);
}

void CastPyArg2AttrBlock(PyObject* obj,
                         paddle::framework::AttributeMap& attrs,  // NOLINT
                         const std::string& key, const std::string& op_type,
                         ssize_t arg_pos) {
  ::pybind11::detail::instance* inst =
      (::pybind11::detail::instance*)obj;  // NOLINT

  if (!PyObject_IsInstance((PyObject*)inst,                   // NOLINT
                           (PyObject*)g_blockdesc_pytype)) {  // NOLINT
    PADDLE_THROW(platform::errors::InvalidArgument(
        "%s(): argument (position %d) must be "
        "BlockDesc, but got %s",
        op_type, arg_pos + 1,
        ((PyTypeObject*)obj->ob_type)->tp_name));  // NOLINT
  }
  void** vh = inst->simple_layout ? inst->simple_value_holder
                                  : &inst->nonsimple.values_and_holders[0];
  attrs[key] = reinterpret_cast<paddle::framework::BlockDesc*&>(vh[0]);
}

void ConstructAttrMapFromPyArgs(
    const std::string& op_type, PyObject* args, ssize_t attr_start,
    ssize_t attr_end, paddle::framework::AttributeMap& attrs) {  // NOLINT
  PADDLE_ENFORCE_EQ(
      (attr_end - attr_start) % 2, 0,
      platform::errors::InvalidArgument(
          "The number of arguments for attributes should be even."));

  auto attr_type_map = &(OpAttrTypeMap::Instance().Map()[op_type]);

  PyObject* obj = nullptr;
  for (ssize_t arg_pos = attr_start; arg_pos < attr_end; arg_pos += 2) {
    Py_ssize_t key_len;
    const char* key_ptr;
    obj = PyTuple_GET_ITEM(args, arg_pos);
    if (PyObject_CheckString(obj)) {
      key_ptr = PyUnicode_AsUTF8AndSize(obj, &key_len);
    } else {
      PADDLE_THROW(platform::errors::InvalidArgument(
          "%s(): argument (position %d) must be str, but got "
          "%s",
          op_type, arg_pos, ((PyTypeObject*)obj->ob_type)->tp_name));  // NOLINT
    }

    std::string key(key_ptr, (size_t)key_len);  // NOLINT
    auto iter = attr_type_map->find(key);
    if (iter == attr_type_map->end()) {
      continue;
    }

    obj = PyTuple_GET_ITEM(args, arg_pos + 1);

    switch (iter->second) {
      case paddle::framework::proto::AttrType::INT:
        CastPyArg2AttrInt(obj, attrs, key, op_type, arg_pos);
        break;
      case paddle::framework::proto::AttrType::FLOAT:
        CastPyArg2AttrFloat(obj, attrs, key, op_type, arg_pos);
        break;
      case paddle::framework::proto::AttrType::STRING:
        CastPyArg2AttrString(obj, attrs, key, op_type, arg_pos);
        break;
      case paddle::framework::proto::AttrType::INTS:
        CastPyArg2AttrInts(obj, attrs, key, op_type, arg_pos);
        break;
      case paddle::framework::proto::AttrType::FLOATS:
        CastPyArg2AttrFloats(obj, attrs, key, op_type, arg_pos);
        break;
      case paddle::framework::proto::AttrType::STRINGS:
        CastPyArg2AttrStrings(obj, attrs, key, op_type, arg_pos);
        break;
      case paddle::framework::proto::AttrType::BOOLEAN:
        CastPyArg2AttrBoolean(obj, attrs, key, op_type, arg_pos);
        break;
      case paddle::framework::proto::AttrType::BOOLEANS:
        CastPyArg2AttrBooleans(obj, attrs, key, op_type, arg_pos);
        break;
      case paddle::framework::proto::AttrType::LONG:
        CastPyArg2AttrLong(obj, attrs, key, op_type, arg_pos);
        break;
      case paddle::framework::proto::AttrType::LONGS:
        CastPyArg2AttrLongs(obj, attrs, key, op_type, arg_pos);
        break;
      case paddle::framework::proto::AttrType::FLOAT64S:
        CastPyArg2AttrFloat64s(obj, attrs, key, op_type, arg_pos);
        break;
      case paddle::framework::proto::AttrType::BLOCK:
        CastPyArg2AttrBlock(obj, attrs, key, op_type, arg_pos);
        break;
      default:
        break;
    }
  }
}

std::shared_ptr<imperative::VarBase> GetVarBaseFromArgs(
    const std::string& op_type, const std::string& arg_name, PyObject* args,
    ssize_t arg_idx, bool dispensable) {
  ::pybind11::detail::instance* inst =
      (::pybind11::detail::instance*)PyTuple_GET_ITEM(args, arg_idx);

  if (PyTuple_Check((PyObject*)inst)) {  // NOLINT
    inst = (::pybind11::detail::instance*)PyTuple_GET_ITEM(inst, 0);
  }

  if (inst == nullptr || (PyObject*)inst == Py_None) {  // NOLINT
    if (!dispensable) {
      PADDLE_THROW(platform::errors::InvalidArgument(
          "%s(): argument '%s' (position %d) must be Tensor, but got None",
          op_type, arg_name, arg_idx));
    }
    return nullptr;
  }

  if (!PyObject_IsInstance((PyObject*)inst,                 // NOLINT
                           (PyObject*)g_varbase_pytype)) {  // NOLINT
    PADDLE_THROW(platform::errors::InvalidArgument(
        "%s(): argument '%s' (position %d) must be Tensor, but got "
        "%s",
        op_type, arg_name, arg_idx,
        ((PyTypeObject*)((PyObject*)inst)->ob_type)->tp_name));  // NOLINT
  }

  void** vh = inst->simple_layout ? inst->simple_value_holder
                                  : &inst->nonsimple.values_and_holders[0];
  return reinterpret_cast<std::shared_ptr<paddle::imperative::VarBase>&>(vh[1]);
}

std::vector<std::shared_ptr<imperative::VarBase>> GetVarBaseListFromArgs(
    const std::string& op_type, const std::string& arg_name, PyObject* args,
    ssize_t arg_idx, bool dispensable) {
  PyObject* list = PyTuple_GET_ITEM(args, arg_idx);

  if (list == nullptr || list == Py_None) {
    if (!dispensable) {
      PADDLE_THROW(platform::errors::InvalidArgument(
          "%s(): argument '%s' (position %d) must be list of Tensor, but got "
          "None",
          op_type, arg_name, arg_idx));  // NOLINT
    }
    return {};
  }

  std::vector<std::shared_ptr<imperative::VarBase>> result;

  if (PyList_Check(list)) {
    Py_ssize_t len = PyList_Size(list);
    if (len == 0) {
      PADDLE_THROW(platform::errors::InvalidArgument(
          "%s(): argument '%s' (position %d) must be list of Tensors, but got "
          "empty list",
          op_type, arg_name, arg_idx));
    }
    ::pybind11::detail::instance* item = nullptr;
    for (Py_ssize_t i = 0; i < len; i++) {
      item = (::pybind11::detail::instance*)PyList_GetItem(list, i);
      if (!PyObject_IsInstance((PyObject*)item,                 // NOLINT
                               (PyObject*)g_varbase_pytype)) {  // NOLINT
        PADDLE_THROW(platform::errors::InvalidArgument(
            "%s(): argument '%s' (position %d) must be list of Tensors, but "
            "got list of "
            "%s",
            op_type, arg_name, arg_idx,
            ((PyTypeObject*)((PyObject*)item)->ob_type)->tp_name));  // NOLINT
      }
      void** vh = item->simple_layout ? item->simple_value_holder
                                      : &item->nonsimple.values_and_holders[0];
      result.emplace_back(
          reinterpret_cast<std::shared_ptr<paddle::imperative::VarBase>&>(
              vh[1]));
    }
  } else if (PyTuple_Check(list)) {
    Py_ssize_t len = PyTuple_Size(list);
    if (len == 0) {
      PADDLE_THROW(platform::errors::InvalidArgument(
          "%s(): argument '%s' (position %d) must be list of Tensors, but got "
          "empty list",
          op_type, arg_name, arg_idx));
    }
    ::pybind11::detail::instance* item = nullptr;
    for (Py_ssize_t i = 0; i < len; i++) {
      item = (::pybind11::detail::instance*)PyTuple_GetItem(list, i);  // NOLINT
      if (!PyObject_IsInstance((PyObject*)item,                        // NOLINT
                               (PyObject*)g_varbase_pytype)) {         // NOLINT
        PADDLE_THROW(platform::errors::InvalidArgument(
            "%s(): argument '%s' (position %d) must be list of Tensors, but "
            "got list of "
            "%s",
            op_type, arg_name, arg_idx,
            ((PyTypeObject*)((PyObject*)item)->ob_type)->tp_name));  // NOLINT
      }
      void** vh = item->simple_layout ? item->simple_value_holder
                                      : &item->nonsimple.values_and_holders[0];
      result.emplace_back(
          reinterpret_cast<std::shared_ptr<paddle::imperative::VarBase>&>(
              vh[1]));
    }
  } else {
    PADDLE_THROW(platform::errors::InvalidArgument(
        "%s(): argument '%s' (position %d) must be list of Tensors, but got "
        "%s",
        op_type, arg_name, arg_idx,
        ((PyTypeObject*)list->ob_type)->tp_name));  // NOLINT
  }

  return result;
}

unsigned long GetUnsignedLongFromArgs(  // NOLINT
    const std::string& op_type, const std::string& arg_name, PyObject* args,
    ssize_t arg_idx, bool dispensable) {
  PyObject* item = PyTuple_GET_ITEM(args, arg_idx);

  if (item == nullptr) {
    if (!dispensable) {
      PADDLE_THROW(platform::errors::InvalidArgument(
          "%s(): argument '%s' (position %d) must be long, but got None",
          op_type, arg_name, arg_idx));
    }
    return 0;
  }

  if (PyObject_CheckLongOrToLong(&item)) {
    return PyLong_AsUnsignedLong(item);
  } else {
    PADDLE_THROW(platform::errors::InvalidArgument(
        "%s(): argument '%s' (position %d) must be "
        "long, but got %s",
        op_type, arg_name, arg_idx,
        ((PyTypeObject*)item->ob_type)->tp_name));  // NOLINT
  }
}

void InitOpsAttrTypeMap() {
  auto op_info_map = paddle::framework::OpInfoMap::Instance().map();
  for (auto iter = op_info_map.begin(); iter != op_info_map.end(); ++iter) {
    auto op_proto = iter->second.proto_;
    if (op_proto == nullptr) {
      continue;
    }
    auto attrs_proto = op_proto->attrs();
    for (auto& attr : attrs_proto) {
      OpAttrTypeMap::Instance().Map()[iter->first][attr.name()] = attr.type();
    }
  }
}

ssize_t GetIdxFromCoreOpsInfoMap(
    const std::unordered_map<std::string, std::vector<std::string>>&
        core_ops_info_map,
    const std::string& op_type, const std::string& name) {
  // `core_ops_info_map` can be `core_ops_args_info` or `core_ops_returns_info`.
  // `core_ops_args_info`: get index from core_ops_args_info[op_type] according
  // to input name.
  // `core_ops_returns_info`: get index from core_ops_returns_info[op_type]
  // according to return name.
  if (!core_ops_info_map.count(op_type)) {
    PADDLE_THROW(platform::errors::Fatal(
        "Op %s is not found in core_ops_*_info map.", op_type));
  } else {
    auto args_list = core_ops_info_map.at(op_type);
    auto it = std::find(args_list.begin(), args_list.end(), name);
    if (it == args_list.end()) {
      PADDLE_THROW(platform::errors::Fatal("%s is not found in op %s's args.",
                                           name, op_type));
    } else {
      return std::distance(args_list.begin(), it);
    }
  }
  return -1;
}

}  // namespace pybind
}  // namespace paddle