import os
import sys
from pathlib import Path

import pytest

from datasets import Dataset, IterableDataset
from datasets.distributed import split_dataset_by_node

from .utils import execute_subprocess_async, get_torch_dist_unique_port, require_torch
def 					snake_case						()       ->       int:

						'''simple docstring'''



						_snake_case						:     List[Any]				=    Dataset.from_dict({"i": range(17						)}						)
						_snake_case						:     Tuple				=    len(__lowercase						)
						_snake_case						:     Any				=    3
						_snake_case						:     List[str]				=    [
						    split_dataset_by_node(__lowercase					,			rank=__lowercase					,			world_size=__lowercase						) for rank in range(__lowercase						)
						]
						assert sum(len(__lowercase						) for ds in datasets_per_rank						) == full_size
						assert len({tuple(x.values()						) for ds in datasets_per_rank for x in ds}						) == full_size
def 					snake_case						()       ->       List[Any]:

						'''simple docstring'''



						def gen():
												return ({"i": i} for i in range(17						))

						_snake_case						:     List[Any]				=    3
						_snake_case						:     Dict				=    IterableDataset.from_generator(__lowercase						)
						_snake_case						:     List[Any]				=    len(list(__lowercase						)						)
						_snake_case						:     str				=    [
						    split_dataset_by_node(__lowercase					,			rank=__lowercase					,			world_size=__lowercase						) for rank in range(__lowercase						)
						]
						assert sum(len(list(__lowercase						)						) for ds in datasets_per_rank						) == full_size
						assert len({tuple(x.values()						) for ds in datasets_per_rank for x in ds}						) == full_size
@pytest.mark.parametrize("shards_per_node"					,			[1, 2, 3]						)
def 					snake_case						(__lowercase						)       ->       List[Any]:

						'''simple docstring'''



						def gen(__lowercase						):
												for shard in shards:
																		yield from ({"i": i, "shard": shard} for i in range(17						))

						_snake_case						:     str				=    3
						_snake_case						:     List[str]				=    shards_per_node * world_size
						_snake_case						:     List[Any]				=    {"shards": [F"""shard_{shard_idx}.txt""" for shard_idx in range(__lowercase						)]}
						_snake_case						:     Optional[int]				=    IterableDataset.from_generator(__lowercase					,			gen_kwargs=__lowercase						)
						_snake_case						:     Tuple				=    len(list(__lowercase						)						)
						assert full_ds.n_shards == world_size * shards_per_node
						_snake_case						:     List[Any]				=    [
						    split_dataset_by_node(__lowercase					,			rank=__lowercase					,			world_size=__lowercase						) for rank in range(__lowercase						)
						]
						assert [ds.n_shards for ds in datasets_per_rank] == [shards_per_node] * world_size
						assert sum(len(list(__lowercase						)						) for ds in datasets_per_rank						) == full_size
						assert len({tuple(x.values()						) for ds in datasets_per_rank for x in ds}						) == full_size
def 					snake_case						()       ->       Dict:

						'''simple docstring'''



						def gen():
												return ({"i": i} for i in range(17						))

						_snake_case						:     Dict				=    2
						_snake_case						:     str				=    IterableDataset.from_generator(__lowercase						)
						_snake_case						:     Dict				=    len(list(__lowercase						)						)

						_snake_case						:     Optional[int]				=    split_dataset_by_node(__lowercase					,			rank=0					,			world_size=__lowercase						).shuffle(seed=42						)
						assert len(list(__lowercase						)						) == 1 + full_size // world_size
						with pytest.raises(__lowercase						):
												split_dataset_by_node(__lowercase					,			rank=0					,			world_size=__lowercase						).shuffle()

						_snake_case						:     Optional[int]				=    split_dataset_by_node(full_ds.shuffle(seed=42						)					,			rank=0					,			world_size=__lowercase						)
						assert len(list(__lowercase						)						) == 1 + full_size // world_size
						with pytest.raises(__lowercase						):
												split_dataset_by_node(full_ds.shuffle()					,			rank=0					,			world_size=__lowercase						)
@pytest.mark.parametrize("streaming"					,			[False, True]						)
@require_torch
@pytest.mark.skipif(os.name == "nt"					,			reason="execute_subprocess_async doesn't support windows"						)
@pytest.mark.integration
def 					snake_case						(__lowercase						)       ->       Any:

						'''simple docstring'''



						_snake_case						:     Union[str, Any]				=    2
						_snake_case						:     Optional[Any]				=    get_torch_dist_unique_port()
						_snake_case						:     Optional[int]				=    Path(__lowercase						).resolve().parent / "distributed_scripts" / "launch_torch_distributed.py"
						_snake_case						:     Any				=    F"""
        -m torch.distributed.launch
        --nproc_per_node={nproc_per_node}
        --master_port={master_port}
        {test_script}
    """.split()
						_snake_case						:     str				=    F"""
        --streaming={streaming}
    """.split()
						_snake_case						:     Optional[Any]				=    [sys.executable] + distributed_args + args
						execute_subprocess_async(__lowercase					,			env=os.environ.copy()						)

@pytest.mark.parametrize(
    "nproc_per_node, num_workers"					,			[
        (2, 2),  # each node has 2 shards and each worker has 1 shards
        (3, 2),  # each node uses all the shards but skips examples, and each worker has 2 shards
    ]					,			)
@require_torch
@pytest.mark.skipif(os.name == "nt"					,			reason="execute_subprocess_async doesn't support windows"						)
@pytest.mark.integration
def 					snake_case						(__lowercase					,			__lowercase						)       ->       Optional[Any]:

						'''simple docstring'''



						_snake_case						:     Dict				=    True
						_snake_case						:     Optional[int]				=    get_torch_dist_unique_port()
						_snake_case						:     List[str]				=    Path(__lowercase						).resolve().parent / "distributed_scripts" / "launch_torch_distributed.py"
						_snake_case						:     List[str]				=    F"""
        -m torch.distributed.launch
        --nproc_per_node={nproc_per_node}
        --master_port={master_port}
        {test_script}
    """.split()
						_snake_case						:     Tuple				=    F"""
        --streaming={streaming}
        --num_workers={num_workers}
    """.split()
						_snake_case						:     Any				=    [sys.executable] + distributed_args + args
						execute_subprocess_async(__lowercase					,			env=os.environ.copy()						)







import logging
from pathlib import Path

import numpy as np
import pytorch_lightning as pl
import torch
from pytorch_lightning.callbacks import EarlyStopping, ModelCheckpoint
from pytorch_lightning.utilities import rank_zero_only

from utils import save_json







def 		_UpperCamelCase      (			UpperCamelCase_				:    Tuple						)     ->      str:

						"""simple docstring"""



						lowerCAmelCase__			  =  filter(lambda UpperCamelCase_						: p.requires_grad			,				model.parameters()						)
						lowerCAmelCase__			  =  sum([np.prod(p.size()						) for p in model_parameters]						)
						return params


__snake_case			:			Dict			   =   logging.getLogger(__name__)


class 			__SCREAMING_SNAKE_CASE    (      pl.Callback):






						def 					UpperCamelCase__					(		self   ,  _UpperCamelCase   ,  _UpperCamelCase      ):






												"""simple docstring"""
												lowerCAmelCase__			  =  {F"lr_group_{i}": param['lr'] for i, param in enumerate(pl_module.trainer.optimizers[0].param_groups      )}
												pl_module.logger.log_metrics(_UpperCamelCase      )






						@rank_zero_only
						def 					UpperCamelCase__					(		self   ,  _UpperCamelCase   ,  _UpperCamelCase   ,  _UpperCamelCase   ,  _UpperCamelCase=True      ):






												"""simple docstring"""
												logger.info(F"***** {type_path} results at step {trainer.global_step:05d} *****"      )
												lowerCAmelCase__			  =  trainer.callback_metrics
												trainer.logger.log_metrics({k: v for k, v in metrics.items() if k not in ['log', 'progress_bar', 'preds']}      )
												# Log results
												lowerCAmelCase__			  =  Path(pl_module.hparams.output_dir      )
												if type_path == "test":
																		lowerCAmelCase__			  =  od / 'test_results.txt'
																		lowerCAmelCase__			  =  od / 'test_generations.txt'
												else:
																		# this never gets hit. I prefer not to save intermediate generations, and results are in metrics.json
																		# If people want this it will be easy enough to add back.
																		lowerCAmelCase__			  =  od / F"{type_path}_results/{trainer.global_step:05d}.txt"
																		lowerCAmelCase__			  =  od / F"{type_path}_generations/{trainer.global_step:05d}.txt"
																		results_file.parent.mkdir(exist_ok=_UpperCamelCase      )
																		generations_file.parent.mkdir(exist_ok=_UpperCamelCase      )
												with open(_UpperCamelCase   ,  'a+'      ) as writer:
																		for key in sorted(_UpperCamelCase      ):
																								if key in ["log", "progress_bar", "preds"]:
																														continue
																								lowerCAmelCase__			  =  metrics[key]
																								if isinstance(_UpperCamelCase   ,  torch.Tensor      ):
																														lowerCAmelCase__			  =  val.item()
																								lowerCAmelCase__			  =  F"{key}: {val:.6f}\n"
																								writer.write(_UpperCamelCase      )

												if not save_generations:
																		return

												if "preds" in metrics:
																		lowerCAmelCase__			  =  '\n'.join(metrics['preds']      )
																		generations_file.open('w+'      ).write(_UpperCamelCase      )






						@rank_zero_only
						def 					UpperCamelCase__					(		self   ,  _UpperCamelCase   ,  _UpperCamelCase      ):






												"""simple docstring"""
												try:
																		lowerCAmelCase__			  =  pl_module.model.model.num_parameters()
												except AttributeError:
																		lowerCAmelCase__			  =  pl_module.model.num_parameters()

												lowerCAmelCase__			  =  count_trainable_parameters(_UpperCamelCase      )
												# mp stands for million parameters
												trainer.logger.log_metrics({'n_params': npars, 'mp': npars / 1E6, 'grad_mp': n_trainable_pars / 1E6}      )






						@rank_zero_only
						def 					UpperCamelCase__					(		self   ,  _UpperCamelCase   ,  _UpperCamelCase      ):






												"""simple docstring"""
												save_json(pl_module.metrics   ,  pl_module.metrics_save_path      )
												return self._write_logs(_UpperCamelCase   ,  _UpperCamelCase   ,  'test'      )







						@rank_zero_only
						def 					UpperCamelCase__					(		self   ,  _UpperCamelCase   ,  _UpperCamelCase      ):






												"""simple docstring"""
												save_json(pl_module.metrics   ,  pl_module.metrics_save_path      )
												# Uncommenting this will save val generations
												# return self._write_logs(trainer, pl_module, "valid")







def 		_UpperCamelCase      (			UpperCamelCase_				:    Union[str, Any]			,				UpperCamelCase_				:    Union[str, Any]			,				UpperCamelCase_				:    List[Any]=1			,				UpperCamelCase_				:    List[str]=False						)     ->      Optional[Any]:

						"""simple docstring"""



						if metric == "rouge2":
												lowerCAmelCase__			  =  '{val_avg_rouge2:.4f}-{step_count}'
						elif metric == "bleu":
												lowerCAmelCase__			  =  '{val_avg_bleu:.4f}-{step_count}'
						elif metric == "loss":
												lowerCAmelCase__			  =  '{val_avg_loss:.4f}-{step_count}'
						else:
												raise NotImplementedError(
												    F"seq2seq callbacks only support rouge2, bleu and loss, got {metric}, You can make your own by adding to"
												    ' this function.'						)

						lowerCAmelCase__			  =  ModelCheckpoint(
						    dirpath=UpperCamelCase_			,				filename=UpperCamelCase_			,				monitor=F"val_{metric}"			,				mode='min' if 'loss' in metric else 'max'			,				save_top_k=UpperCamelCase_			,				)
						return checkpoint_callback







def 		_UpperCamelCase      (			UpperCamelCase_				:    Union[str, Any]			,				UpperCamelCase_				:    int						)     ->      Dict:

						"""simple docstring"""



						return EarlyStopping(
						    monitor=F"val_{metric}"			,				mode='min' if 'loss' in metric else 'max'			,				patience=UpperCamelCase_			,				verbose=UpperCamelCase_			,				)





