# coding:utf-8 # Copyright (c) 2019 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 absolute_import from __future__ import division from __future__ import print_function import os import contextlib import time import copy import inspect from functools import partial from collections import OrderedDict import six if six.PY2: from inspect import getargspec as get_args else: from inspect import getfullargspec as get_args import numpy as np import paddle import paddle.fluid as fluid from tb_paddle import SummaryWriter import paddlehub as hub from paddlehub.common.paddle_helper import dtype_map, clone_program from paddlehub.common.utils import mkdir, version_compare from paddlehub.common.dir import tmp_dir from paddlehub.common.logger import logger from paddlehub.finetune.checkpoint import load_checkpoint, save_checkpoint from paddlehub.finetune.config import RunConfig class RunState(object): """ RunState is used to save the result of every running step Args: length (int): the number of fetch result """ def __init__(self, length): self.run_time_begin = time.time() self.run_step = 0 self.run_examples = 0 self.run_results = [0] * length self.run_time_used = 0 self.run_speed = 0.0 def __add__(self, other): self.run_step += other.run_step self.run_examples += other.run_examples for index in range(len(self.run_results)): self.run_results[index] += other.run_results[index] return self def update(self): self.run_time_used = time.time() - self.run_time_begin self.run_speed = self.run_step / self.run_time_used return self class RunEnv(object): """ RunEnv saves the running environment of the train/dev/predict phase, including program, reader, metrics and so on. """ def __init__(self): self.current_epoch = 0 self.current_step = 0 self.main_program = None self.start_program = None self.main_program_compiled = None self.py_reader = None self.reader = None self.loss = None self.labels = None self.metrics = None self.is_inititalized = False self.UNG = copy.deepcopy(fluid.unique_name.generator) def __setattr__(self, key, value): self.__dict__[key] = value def __getattr__(self, key): return self.__dict__[key] class TaskHooks(): """ TaskHooks can handle some tasks during the spectific event. """ def __init__(self): self._registered_hooks = { "build_env_start_event": OrderedDict(), "build_env_end_event": OrderedDict(), "finetune_start_event": OrderedDict(), "finetune_end_event": OrderedDict(), "predict_start_event": OrderedDict(), "predict_end_event": OrderedDict(), "eval_start_event": OrderedDict(), "eval_end_event": OrderedDict(), "log_interval_event": OrderedDict(), "save_ckpt_interval_event": OrderedDict(), "eval_interval_event": OrderedDict(), "run_step_event": OrderedDict(), } self._hook_params_num = { "build_env_start_event": 1, "build_env_end_event": 1, "finetune_start_event": 1, "finetune_end_event": 2, "predict_start_event": 1, "predict_end_event": 2, "eval_start_event": 1, "eval_end_event": 2, "log_interval_event": 2, "save_ckpt_interval_event": 1, "eval_interval_event": 1, "run_step_event": 2, } def add(self, hook_type, name=None, func=None): """ add the handler function to spectific event. Args: hook_type (str): the spectific event name name (str): the handler function name, default None func (func): the handler function, default None """ if not func or not callable(func): raise TypeError( "The hook function is empty or it is not a function") if name == None: name = "hook_%s" % id(func) # check validity if not isinstance(name, str) or name.strip() == "": raise TypeError("The hook name must be a non-empty string") if hook_type not in self._registered_hooks: raise ValueError("hook_type: %s does not exist" % (hook_type)) if name in self._registered_hooks[hook_type]: raise ValueError( "name: %s has existed in hook_type:%s, use modify method to modify it" % (name, hook_type)) else: args_num = len(get_args(func).args) if args_num != self._hook_params_num[hook_type]: raise ValueError( "The number of parameters to the hook hook_type:%s should be %i" % (hook_type, self._hook_params_num[hook_type])) self._registered_hooks[hook_type][name] = func def delete(self, hook_type, name): """ delete the handler function of spectific event. Args: hook_type (str): the spectific event name name (str): the handler function name """ if self.exist(hook_type, name): del self._registered_hooks[hook_type][name] else: raise ValueError( "No hook_type: %s exists or name: %s does not exist in hook_type: %s" % (hook_type, name, hook_type)) def modify(self, hook_type, name, func): """ modify the handler function of spectific event. Args: hook_type (str): the spectific event name name (str): the handler function name func (func): the new handler function """ if not (isinstance(name, str) and callable(func)): raise TypeError( "The hook name must be a string, and the hook function must be a function" ) if self.exist(hook_type, name): self._registered_hooks[hook_type][name] = func else: raise ValueError( "No hook_type: %s exists or name: %s does not exist in hook_type: %s" % (hook_type, name, hook_type)) def exist(self, hook_type, name): """ check if the the handler function of spectific event is existing. Args: hook_type (str): the spectific event name name (str): the handler function name Returns: bool: True or False """ if hook_type not in self._registered_hooks \ or name not in self._registered_hooks[hook_type]: return False else: return True def info(self, show_default=False): """ get the hooks information, including the source code. Args: show_default (bool): show the information of Paddlehub default hooks or not, default False Returns: str: the formatted string of the hooks information """ # formatted output the source code ret = "" for hook_type, hooks in self._registered_hooks.items(): already_print_type = False for name, func in hooks.items(): if name == "default" and not show_default: continue if not already_print_type: ret += "hook_type: %s{\n" % hook_type already_print_type = True source = inspect.getsource(func) ret += " name: %s{\n" % name for line in source.split("\n"): ret += " %s\n" % line ret += " }\n" if already_print_type: ret += "}\n" if not ret: ret = "Not any customized hooks have been defined, you can set show_default=True to see the default hooks information" return ret def __getitem__(self, hook_type): return self._registered_hooks[hook_type] def __repr__(self): return self.info(show_default=False) class BaseTask(object): """ BaseTask is the base class of all the task. It will complete the building of all the running environment. Args: feed_list (list): the inputs name data_reader (object): data reader for the task main_program (object): the customized main_program, default None startup_program (object): the customized startup_program, default None config (object): the config for the task, default None metrics_choices (list): metrics used to the task, default ["acc"] """ def __init__(self, feed_list, data_reader, main_program=None, startup_program=None, config=None, metrics_choices="default"): # base item self._base_data_reader = data_reader self._base_feed_list = feed_list # metrics item self.best_score = -999 if metrics_choices == "default": metrics_choices = ["acc"] elif metrics_choices == None: metrics_choices = [] if isinstance(metrics_choices, list): self.metrics_choices = metrics_choices else: self.metrics_choices = [metrics_choices] if main_program is None: self._base_main_program = clone_program( fluid.default_main_program(), for_test=False) else: self._base_main_program = clone_program( main_program, for_test=False) if startup_program is None: self._base_startup_program = clone_program( fluid.default_startup_program(), for_test=False) else: self._base_startup_program = clone_program( startup_program, for_test=False) self.is_checkpoint_loaded = False self._base_compiled_program = None # run config self.config = config if config else RunConfig() self.place = self.places[0] self.device_count = len(self.places) if self.config.use_data_parallel: if not self.config.use_pyreader and self.config.batch_size < self.device_count: logger.warning( "Batch size({}) is less than the count of devices({}), which is not allowed in current Paddle versions" .format(self.config.batch_size, self.device_count)) logger.warning("Batch size automatically adjusted to {}".format( self.device_count)) self.config._batch_size = self.device_count self.exe = fluid.Executor(place=self.place) self.build_strategy = fluid.BuildStrategy() # run environment self._phases = [] self._envs = {} self._predict_data = None self._tb_writer = None # event hooks self._hooks = TaskHooks() for hook_type, event_hooks in self._hooks._registered_hooks.items(): self._hooks.add(hook_type, "default", eval("self._default_%s" % hook_type)) setattr(BaseTask, "_%s" % hook_type, self.create_event_function(hook_type)) # accelerate predict self.is_best_model_loaded = False self._predictor = None # set default phase self.enter_phase("train") @contextlib.contextmanager def phase_guard(self, phase): self.enter_phase(phase) yield self.exit_phase() def enter_phase(self, phase): if phase not in ["train", "val", "dev", "test", "predict", "inference"]: raise RuntimeError() if phase in ["val", "dev"]: phase = "dev" elif phase in ["predict", "inference"]: phase = "predict" self._phases.append(phase) def exit_phase(self): self._phases = self._phases[:-1] def init_if_necessary(self): if not self.is_checkpoint_loaded: if not self.load_checkpoint(): self.exe.run(self._base_startup_program) self.is_checkpoint_loaded = True self.is_best_model_loaded = False def init_if_load_best_model(self): if not self.is_best_model_loaded: best_model_path = os.path.join(self.config.checkpoint_dir, "best_model") logger.info("Load the best model from %s" % best_model_path) if os.path.exists(best_model_path): self.load_parameters(best_model_path) self.is_checkpoint_loaded = False self.is_best_model_loaded = True else: self.init_if_necessary() else: logger.info("The best model has been loaded") def _build_env(self): """ building the program and strategy for specific running phase. """ if self.env.is_inititalized: return self._build_env_start_event() self.env.is_inititalized = True self.env.main_program = clone_program( self._base_main_program, for_test=False) self.env.startup_program = fluid.Program() with fluid.program_guard(self.env.main_program, self._base_startup_program): with fluid.unique_name.guard(self.env.UNG): self.env.outputs = self._build_net() if self.is_train_phase or self.is_test_phase: self.env.labels = self._add_label() self.env.loss = self._add_loss() self.env.metrics = self._add_metrics() if self.is_predict_phase or self.is_test_phase: self.env.main_program = clone_program( self.env.main_program, for_test=True) hub.common.paddle_helper.set_op_attr( self.env.main_program, is_test=True) if self.config.enable_memory_optim: for var_name in self.fetch_list: var = self.env.main_program.global_block().vars[var_name] var.persistable = True if self.is_train_phase: with fluid.program_guard(self.env.main_program, self._base_startup_program): with fluid.unique_name.guard(self.env.UNG): self.scheduled_lr, self.max_train_steps = self.config.strategy.execute( self.loss, self._base_data_reader, self.config, self.device_count) if self.is_train_phase: loss_name = self.env.loss.name else: loss_name = None share_vars_from = self._base_compiled_program if not self.config.use_data_parallel: self.env.main_program_compiled = None else: self.env.main_program_compiled = fluid.CompiledProgram( self.env.main_program).with_data_parallel( loss_name=loss_name, share_vars_from=share_vars_from, build_strategy=self.build_strategy, places=self.places) self.exe.run(self.env.startup_program) self._build_env_end_event() @property def places(self): if self.config.use_cuda: _places = fluid.framework.cuda_places() else: _places = fluid.framework.cpu_places() if not self.config.use_data_parallel: return [_places[0]] return _places @property def return_numpy(self): return True @property def is_train_phase(self): return self.phase in ["train"] @property def is_test_phase(self): return self.phase in ["val", "dev", "test"] @property def is_predict_phase(self): return self.phase in ["predict", "inference"] @property def phase(self): return self._phases[-1] @property def env(self): phase = self.phase if phase in ["val", "dev", "test"]: phase = "dev" if not phase in self._envs: self._envs[phase] = RunEnv() return self._envs[phase] @property def py_reader(self): if not self.env.is_inititalized: self._build_env() return self.env.py_reader @property def current_step(self): if not self.env.is_inititalized: self._build_env() return self.env.current_step @property def current_epoch(self): if not self.env.is_inititalized: self._build_env() return self.env.current_epoch @property def main_program(self): if not self.env.is_inititalized: self._build_env() return self.env.main_program @property def startup_program(self): if not self.env.is_inititalized: self._build_env() return self.env.startup_program @property def main_program_compiled(self): if not self.env.is_inititalized: self._build_env() return self.env.main_program_compiled @property def main_program_to_be_run(self): if self.config.use_data_parallel: if self._base_compiled_program is None: self._base_compiled_program = self.env.main_program_compiled return self.main_program_compiled return self.main_program @property def reader(self): if self.is_predict_phase: data = self._predict_data else: data = None self.env.reader = self._base_data_reader.data_generator( batch_size=self.config.batch_size, phase=self.phase, data=data, return_list=not self.config.use_pyreader) return self.env.reader @property def loss(self): if self.is_predict_phase: raise RuntimeError() if not self.env.is_inititalized: self._build_env() return self.env.loss @property def labels(self): if self.is_predict_phase: raise RuntimeError() if not self.env.is_inititalized: self._build_env() return self.env.labels @property def outputs(self): if not self.env.is_inititalized: self._build_env() return self.env.outputs @property def metrics(self): if self.is_predict_phase: raise RuntimeError() if not self.env.is_inititalized: self._build_env() return self.env.metrics @property def unique_name_generator(self): return self.env.UNG @property def feed_list(self): feed_list = [varname for varname in self._base_feed_list] if self.is_train_phase or self.is_test_phase: feed_list += [label.name for label in self.labels] return feed_list @property def feed_var_list(self): vars = self.main_program.global_block().vars return [vars[varname] for varname in self.feed_list] @property def fetch_list(self): if self.is_train_phase or self.is_test_phase: return [metric.name for metric in self.metrics] + [self.loss.name] return [output.name for output in self.outputs] @property def fetch_var_list(self): vars = self.main_program.global_block().vars return [vars[varname] for varname in self.fetch_list] @property def tb_writer(self): """ get tb_writer for visualization. """ if not os.path.exists(self.config.checkpoint_dir): mkdir(self.config.checkpoint_dir) tb_log_dir = os.path.join(self.config.checkpoint_dir, "visualization") if not self._tb_writer: self._tb_writer = SummaryWriter(tb_log_dir) return self._tb_writer def create_event_function(self, hook_type): """ create handlers for specific event. Args: hook_type (str): specific event name Returns: func: executable function, the class method will receive a parameter named self. """ def hook_function(self, *args): # all the handler in self._hooks[hook_type] will be configured to executable for name, func in self._hooks[hook_type].items(): if inspect.ismethod(func): func(*args) else: partial(func, self)(*args) return hook_function @property def hooks(self): return self._hooks def hooks_info(self, show_default=False): """ get the hooks information, including the source code. Args: show_default (bool): show the information of Paddlehub default hooks or not, default False Returns: str: the formatted string of the hooks information """ return self._hooks.info(show_default) def add_hook(self, hook_type, name=None, func=None): """ add the handler function to spectific event. Args: hook_type (str): the spectific event name name (str): the handler function name, default None func (func): the handler function, default None """ if name == None: name = "hook_%s" % id(func) self._hooks.add(hook_type, name=name, func=func) logger.info("Add hook %s:%s successfully" % (hook_type, name)) def delete_hook(self, hook_type, name): """ delete the handler function of spectific event. Args: hook_type (str): the spectific event name name (str): the handler function name """ self._hooks.delete(hook_type, name) logger.info("Delete hook %s:%s successfully" % (hook_type, name)) def modify_hook(self, hook_type, name, func): """ modify the handler function of spectific event. Args: hook_type (str): the spectific event name name (str): the handler function name func (func): the new handler function """ self._hooks.modify(hook_type, name, func) logger.info("Modify hook %s:%s successfully" % (hook_type, name)) def _default_build_env_start_event(self): pass def _default_build_env_end_event(self): if not self.is_predict_phase: self.env.score_scalar = {} def _default_finetune_start_event(self): logger.info("PaddleHub finetune start") def _default_finetune_end_event(self, run_states): logger.info("PaddleHub finetune finished.") def _default_predict_start_event(self): logger.info("PaddleHub predict start") def _default_predict_end_event(self, run_states): logger.info("PaddleHub predict finished.") def _default_eval_start_event(self): logger.info("Evaluation on {} dataset start".format(self.phase)) def _default_eval_end_event(self, run_states): """ Paddlehub default handler for eval_end_event, it will complete visualization and metrics calculation Args: run_states (object): the results in eval phase """ eval_scores, eval_loss, run_speed = self._calculate_metrics(run_states) if 'train' in self._envs: self.tb_writer.add_scalar( tag="Loss_{}".format(self.phase), scalar_value=eval_loss, global_step=self._envs['train'].current_step) log_scores = "" for metric in eval_scores: if 'train' in self._envs: self.tb_writer.add_scalar( tag="{}_{}".format(metric, self.phase), scalar_value=eval_scores[metric], global_step=self._envs['train'].current_step) log_scores += "%s=%.5f " % (metric, eval_scores[metric]) logger.eval( "[%s dataset evaluation result] loss=%.5f %s[step/sec: %.2f]" % (self.phase, eval_loss, log_scores, run_speed)) eval_scores_items = eval_scores.items() if len(eval_scores_items): # The first metric will be chose to eval main_metric, main_value = list(eval_scores_items)[0] else: logger.warning( "None of metrics has been implemented, loss will be used to evaluate." ) # The larger, the better main_metric, main_value = "negative loss", -eval_loss if self.phase in ["dev", "val"] and main_value > self.best_score: self.best_score = main_value model_saved_dir = os.path.join(self.config.checkpoint_dir, "best_model") logger.eval("best model saved to %s [best %s=%.5f]" % (model_saved_dir, main_metric, main_value)) self.save_inference_model(dirname=model_saved_dir) def _default_log_interval_event(self, run_states): """ PaddleHub default handler for log_interval_event, it will complete visualization. Args: run_states (object): the results in train phase """ scores, avg_loss, run_speed = self._calculate_metrics(run_states) self.tb_writer.add_scalar( tag="Loss_{}".format(self.phase), scalar_value=avg_loss, global_step=self._envs['train'].current_step) log_scores = "" for metric in scores: self.tb_writer.add_scalar( tag="{}_{}".format(metric, self.phase), scalar_value=scores[metric], global_step=self._envs['train'].current_step) log_scores += "%s=%.5f " % (metric, scores[metric]) logger.train("step %d / %d: loss=%.5f %s[step/sec: %.2f]" % (self.current_step, self.max_train_steps, avg_loss, log_scores, run_speed)) def _default_save_ckpt_interval_event(self): self.save_checkpoint() def _default_eval_interval_event(self): self.eval(phase="dev") def _default_run_step_event(self, run_state): pass def _build_net(self): raise NotImplementedError def _add_loss(self): raise NotImplementedError def _add_label(self): raise NotImplementedError def _add_metrics(self): # Some metrics like acc, auc can be calculated by fluid.layers # The others can be calculated in _calculate_metrics function raise NotImplementedError def _calculate_metrics(self, run_states): # NOTE: if you want to customize the metrics # you should make sure that the first parameter returned is a dict # The first key will be used as main metrics to update the best model raise NotImplementedError # NOTE: current saved checkpoint machanism is not completed, # it can't restore dataset training status def save_checkpoint(self): """ save the program of the last step in training """ model_saved_dir = os.path.join(self.config.checkpoint_dir, "step_%d" % self.current_step) logger.info("Saving model checkpoint to {}".format(model_saved_dir)) # to resume traning by loading ckpt, it must be save program (save_persistables) fluid.io.save_persistables( self.exe, dirname=model_saved_dir, main_program=self.main_program) save_checkpoint( checkpoint_dir=self.config.checkpoint_dir, current_epoch=self.current_epoch, global_step=self.current_step, best_score=self.best_score, exe=self.exe, main_program=self.main_program) def load_checkpoint(self): is_load_successful, self.env.current_epoch, self.env.current_step, self.best_score = load_checkpoint( self.config.checkpoint_dir, self.exe, main_program=self.main_program) return is_load_successful def load_parameters(self, dirname): def if_exist(var): path = os.path.join(dirname, var.name) return os.path.exists(path) fluid.io.load_vars( self.exe, dirname, self.main_program, predicate=if_exist) def save_parameters(self, dirname): fluid.io.save_params( self.exe, dirname=dirname, main_program=self.main_program) def save_inference_model(self, dirname, model_filename=None, params_filename=None): with self.phase_guard("predict"): fluid.io.save_inference_model( dirname=dirname, executor=self.exe, feeded_var_names=self.feed_list, target_vars=self.fetch_var_list, main_program=self.main_program, model_filename=model_filename, params_filename=params_filename) def finetune_and_eval(self): return self.finetune(do_eval=True) def finetune(self, do_eval=False): """ train and finetune the module parameters. Args: do_eval (bool): do eval during train phase or not Returns: RunState: the running result of train phase """ # Start to finetune with self.phase_guard(phase="train"): self.init_if_necessary() self._finetune_start_event() run_states = [] if self.current_epoch <= self.config.num_epoch: while self.current_epoch <= self.config.num_epoch: self.config.strategy.step() run_states = self._run(do_eval=do_eval) self.env.current_epoch += 1 # Final evaluation if self._base_data_reader.get_dev_examples() != []: # Warning: DO NOT use self.eval(phase="dev", load_best_model=True) during training. # It will cause trainer unable to continue training from checkpoint after eval. # More important, The model should evaluate current performance during training. self.eval(phase="dev") if self._base_data_reader.get_test_examples() != []: self.eval(phase="test", load_best_model=True) # Save checkpoint after finetune self.save_checkpoint() self._finetune_end_event(run_states) return run_states def eval(self, phase="dev", load_best_model=False): """ evaluate the performance of current module. Args: phase (str): current run phase load_best_model (bool): load the best model or not Returns: RunState: the running result of eval phase """ # Warning: DO NOT use eval(load_best_model=True) in finetune_and_eval # It will cause trainer unable to continue training from checkpoint after eval # More important, The model should evaluate current performance during training. with self.phase_guard(phase=phase): if load_best_model: self.init_if_load_best_model() else: self.init_if_necessary() self._eval_start_event() run_states = self._run() self._eval_end_event(run_states) return run_states def _create_predictor(self): """ create high-performance predictor for predict. Returns: PaddlePredictor: the high-performance predictor """ with tmp_dir() as _dir: self.save_inference_model(dirname=_dir) predictor_config = fluid.core.AnalysisConfig(_dir) predictor_config.disable_glog_info() if self.config.use_cuda: predictor_config.enable_use_gpu(100, 0) predictor_config.switch_ir_optim(True) else: predictor_config.disable_gpu() predictor_config.enable_memory_optim() return fluid.core.create_paddle_predictor(predictor_config) def _run_with_predictor(self): """ use high-performance predictor to make prediction. Returns: RunState: the running result of predict phase """ if isinstance(self._base_data_reader, hub.reader.LACClassifyReader): raise Exception( "LACClassifyReader does not support predictor, please close accelerate_mode" ) global_run_states = [] period_run_states = [] for run_step, batch in enumerate(self.reader(), start=1): step_run_state = RunState(len(self.fetch_list)) step_run_state.run_step = 1 num_batch_examples = len(batch) if not self.config.use_pyreader: # if use pyreader, the nlp_reader return [batch] batch = batch[0] batch = [fluid.core.PaddleTensor(data) for data in batch] fetch_result = self._predictor.run(batch) for index, result in enumerate(fetch_result): step_run_state.run_results[index] = result.as_ndarray() step_run_state.run_examples += num_batch_examples step_run_state.update() period_run_states += [step_run_state] self._run_step_event(step_run_state) global_run_states += period_run_states return global_run_states def predict(self, data, load_best_model=True, return_result=False, accelerate_mode=True): """ make prediction for the input data. Args: data (list): the data will be predicted. load_best_model (bool): load the best model or not return_result (bool): return a readable result or just the raw run result accelerate_mode (bool): use high-performance predictor or not Returns: RunState: the running result of predict phase """ if not version_compare(paddle.__version__, "1.6.2") and accelerate_mode: logger.warning( "Fail to open predict accelerate mode as it does not support paddle < 1.6.2. Please update PaddlePaddle." ) accelerate_mode = False self.accelerate_mode = accelerate_mode with self.phase_guard(phase="predict"): self._predict_data = data self._predict_start_event() if load_best_model: self.init_if_load_best_model() else: self.init_if_necessary() if not self.accelerate_mode: run_states = self._run() else: if not self._predictor: self._predictor = self._create_predictor() run_states = self._run_with_predictor() self._predict_end_event(run_states) self._predict_data = None if return_result: return self._postprocessing(run_states) return run_states def _postprocessing(self, run_states): """ postprocessing the run result, get readable result. Args: run_states (RunState): the raw run result to be processed Returns: list: readable result """ results = [] for batch_state in run_states: batch_result = batch_state.run_results[0] results += [result[0] for result in batch_result] return results def _run(self, do_eval=False): """ load data and run the program. Args: do_eval (bool): do eval during train phase or not Returns: RunState: the running result of specific phase """ with fluid.program_guard(self.main_program, self.startup_program): if self.config.use_pyreader: data_loader = fluid.io.DataLoader.from_generator( feed_list=self.feed_var_list, capacity=64, use_double_buffer=True, iterable=True) data_reader = data_loader.set_batch_generator( self.reader, places=self.places) else: data_feeder = fluid.DataFeeder( feed_list=self.feed_list, place=self.place) data_reader = data_feeder.decorate_reader( self.reader, multi_devices=self.config.use_data_parallel, drop_last=True) global_run_states = [] period_run_states = [] for run_step, batch in enumerate(data_reader(), start=1): step_run_state = RunState(len(self.fetch_list)) step_run_state.run_step = 1 num_batch_examples = len(batch) fetch_result = self.exe.run( self.main_program_to_be_run, feed=batch, fetch_list=self.fetch_list, return_numpy=self.return_numpy) if not self.return_numpy: fetch_result = [np.array(x) for x in fetch_result] for index, result in enumerate(fetch_result): step_run_state.run_results[index] = result step_run_state.run_examples += num_batch_examples step_run_state.update() period_run_states += [step_run_state] self.env.current_step += 1 if self.is_train_phase: if self.current_step % self.config.log_interval == 0: self._log_interval_event(period_run_states) global_run_states += period_run_states period_run_states = [] if self.config.save_ckpt_interval and self.current_step % self.config.save_ckpt_interval == 0: self._save_ckpt_interval_event() if do_eval and self.current_step % self.config.eval_interval == 0: self._eval_interval_event() self._run_step_event(step_run_state) global_run_states += period_run_states return global_run_states def __repr__(self): return "Task: %s with metrics_choices: %s， reader: %s, %s" % ( self.__class__.__name__, self.metrics_choices, self._base_data_reader.__class__.__name__, self.config)