






"""simple docstring"""





import argparse
import os

import evaluate
import torch
from datasets import load_dataset
from torch.optim import AdamW
from torch.utils.data import DataLoader
from transformers import AutoModelForSequenceClassification, AutoTokenizer, get_linear_schedule_with_warmup, set_seed

from accelerate import Accelerator, DistributedType


########################################################################
# This is a fully working simple example to use Accelerate
#
# This example trains a Bert base model on GLUE MRPC
# in any of the following settings (with the same script):
#   - single CPU or single GPU
#   - multi GPUS (using PyTorch distributed mode)
#   - (multi) TPUs
#   - fp16 (mixed-precision) or fp32 (normal precision)
#
# This example also demonstrates the checkpointing and sharding capabilities
#
# To run it in each of these various modes, follow the instructions
# in the readme for examples:
# https://github.com/huggingface/accelerate/tree/main/examples
#
########################################################################


UpperCamelCase					=     16
UpperCamelCase					=     32






def 							A(    snake_case_		,  snake_case_						):
       """simple docstring"""





       if args.with_tracking:
              lowercase__:							int         =     Accelerator(
                  cpu=args.cpu		,  mixed_precision=args.mixed_precision		,  log_with="all"		,  project_dir=args.project_dir						)
       else:
              lowercase__:							Tuple         =     Accelerator(cpu=args.cpu		,  mixed_precision=args.mixed_precision						)

       if hasattr(args.checkpointing_steps		,  "isdigit"						):
              if args.checkpointing_steps == "epoch":
                     lowercase__:							Any         =     args.checkpointing_steps
              elif args.checkpointing_steps.isdigit():
                     lowercase__:							List[str]         =     int(args.checkpointing_steps						)
              else:
                     raise ValueError(
                         F"""Argument `checkpointing_steps` must be either a number or `epoch`. `{args.checkpointing_steps}` passed."""						)
       else:
              lowercase__:							List[Any]         =     None
       # Sample hyper-parameters for learning rate, batch size, seed and a few other HPs
       lowercase__:							Union[str, Any]         =     config["lr"]
       lowercase__:							int         =     int(config["num_epochs"]						)
       lowercase__:							Dict         =     int(config["seed"]						)
       lowercase__:							Union[str, Any]         =     int(config["batch_size"]						)

       # We need to initialize the trackers we use, and also store our configuration
       if args.with_tracking:
              lowercase__:							Optional[Any]         =     os.path.split(snake_case_						)[-1].split("."						)[0]
              accelerator.init_trackers(snake_case_		,  snake_case_						)

       lowercase__:							List[Any]         =     AutoTokenizer.from_pretrained("bert-base-cased"						)
       lowercase__:							str         =     load_dataset("glue"		,  "mrpc"						)
       lowercase__:							List[Any]         =     evaluate.load("glue"		,  "mrpc"						)

       def tokenize_function(snake_case_						):
              # max_length=None => use the model max length (it's actually the default)
              lowercase__:							Optional[int]         =     tokenizer(examples["sentence1"]		,  examples["sentence2"]		,  truncation=snake_case_		,  max_length=snake_case_						)
              return outputs

       # Apply the method we just defined to all the examples in all the splits of the dataset
       # starting with the main process first:
       with accelerator.main_process_first():
              lowercase__:							Any         =     datasets.map(
                  snake_case_		,  batched=snake_case_		,  remove_columns=["idx", "sentence1", "sentence2"]		,  )

       # We also rename the 'label' column to 'labels' which is the expected name for labels by the models of the
       # transformers library
       lowercase__:							Optional[Any]         =     tokenized_datasets.rename_column("label"		,  "labels"						)

       # If the batch size is too big we use gradient accumulation
       lowercase__:							Any         =     1
       if batch_size > MAX_GPU_BATCH_SIZE and accelerator.distributed_type != DistributedType.TPU:
              lowercase__:							Tuple         =     batch_size // MAX_GPU_BATCH_SIZE
              lowercase__:							str         =     MAX_GPU_BATCH_SIZE

       def collate_fn(snake_case_						):
              # On TPU it's best to pad everything to the same length or training will be very slow.
              lowercase__:							List[Any]         =     128 if accelerator.distributed_type == DistributedType.TPU else None
              # When using mixed precision we want round multiples of 8/16
              if accelerator.mixed_precision == "fp8":
                     lowercase__:							Dict         =     16
              elif accelerator.mixed_precision != "no":
                     lowercase__:							Optional[Any]         =     8
              else:
                     lowercase__:							int         =     None

              return tokenizer.pad(
                  snake_case_		,  padding="longest"		,  max_length=snake_case_		,  pad_to_multiple_of=snake_case_		,  return_tensors="pt"		,  )

       # Instantiate dataloaders.
       lowercase__:							Optional[int]         =     DataLoader(
           tokenized_datasets["train"]		,  shuffle=snake_case_		,  collate_fn=snake_case_		,  batch_size=snake_case_						)
       lowercase__:							Any         =     DataLoader(
           tokenized_datasets["validation"]		,  shuffle=snake_case_		,  collate_fn=snake_case_		,  batch_size=snake_case_						)

       set_seed(snake_case_						)

       # Instantiate the model (we build the model here so that the seed also control new weights initialization)
       lowercase__:							Union[str, Any]         =     AutoModelForSequenceClassification.from_pretrained("bert-base-cased"		,  return_dict=snake_case_						)

       # We could avoid this line since the accelerator is set with `device_placement=True` (default value).
       # Note that if you are placing tensors on devices manually, this line absolutely needs to be before the optimizer
       # creation otherwise training will not work on TPU (`accelerate` will kindly throw an error to make us aware of that).
       lowercase__:							Union[str, Any]         =     model.to(accelerator.device						)

       # Instantiate optimizer
       lowercase__:							str         =     AdamW(params=model.parameters()		,  lr=snake_case_						)

       # Instantiate scheduler
       lowercase__:							Any         =     get_linear_schedule_with_warmup(
           optimizer=snake_case_		,  num_warmup_steps=100		,  num_training_steps=(len(snake_case_						) * num_epochs) // gradient_accumulation_steps		,  )

       # Prepare everything
       # There is no specific order to remember, we just need to unpack the objects in the same order we gave them to the
       # prepare method.
       lowercase__    ,      lowercase__    ,      lowercase__    ,      lowercase__    ,      lowercase__:							Union[str, Any]         =     accelerator.prepare(
           snake_case_		,  snake_case_		,  snake_case_		,  snake_case_		,  snake_case_						)

       # We need to keep track of how many total steps we have iterated over
       lowercase__:							List[Any]         =     0
       # We also need to keep track of the stating epoch so files are named properly
       lowercase__:							Tuple         =     0

       # Potentially load in the weights and states from a previous save
       if args.resume_from_checkpoint:
              if args.resume_from_checkpoint is not None or args.resume_from_checkpoint != "":
                     accelerator.print(F"""Resumed from checkpoint: {args.resume_from_checkpoint}"""						)
                     accelerator.load_state(args.resume_from_checkpoint						)
                     lowercase__:							Optional[Any]         =     os.path.basename(args.resume_from_checkpoint						)
              else:
                     # Get the most recent checkpoint
                     lowercase__:							int         =     [f.name for f in os.scandir(os.getcwd()						) if f.is_dir()]
                     dirs.sort(key=os.path.getctime						)
                     lowercase__:							Tuple         =     dirs[-1]  # Sorts folders by date modified, most recent checkpoint is the last
              # Extract `epoch_{i}` or `step_{i}`
              lowercase__:							Any         =     os.path.splitext(snake_case_						)[0]

              if "epoch" in training_difference:
                     lowercase__:							Dict         =     int(training_difference.replace("epoch_"		,  ""						)						) + 1
                     lowercase__:							int         =     None
              else:
                     lowercase__:							Tuple         =     int(training_difference.replace("step_"		,  ""						)						)
                     lowercase__:							Optional[int]         =     resume_step // len(snake_case_						)
                     resume_step -= starting_epoch * len(snake_case_						)

    # Now we train the model
       for epoch in range(snake_case_		,  snake_case_						):
              model.train()
              if args.with_tracking:
                     lowercase__:							Optional[Any]         =     0
              if args.resume_from_checkpoint and epoch == starting_epoch and resume_step is not None:
                     # We need to skip steps until we reach the resumed step
                     lowercase__:							int         =     accelerator.skip_first_batches(snake_case_		,  snake_case_						)
                     overall_step += resume_step
              else:
                     # After the first iteration though, we need to go back to the original dataloader
                     lowercase__:							str         =     train_dataloader
              for step, batch in enumerate(snake_case_						):
                     # We could avoid this line since we set the accelerator with `device_placement=True`.
                     batch.to(accelerator.device						)
                     lowercase__:							Union[str, Any]         =     model(**snake_case_						)
                     lowercase__:							List[str]         =     outputs.loss
                     lowercase__:							Optional[int]         =     loss / gradient_accumulation_steps
                     # We keep track of the loss at each epoch
                     if args.with_tracking:
                            total_loss += loss.detach().float()
                     accelerator.backward(snake_case_						)
                     if step % gradient_accumulation_steps == 0:
                            optimizer.step()
                            lr_scheduler.step()
                            optimizer.zero_grad()

                     overall_step += 1

                     if isinstance(snake_case_		,  snake_case_						):
                            lowercase__:							int         =     F"""step_{overall_step}"""
                            if overall_step % checkpointing_steps == 0:
                                   if args.output_dir is not None:
                                          lowercase__:							List[Any]         =     os.path.join(args.output_dir		,  snake_case_						)
                                   accelerator.save_state(snake_case_						)

              model.eval()
              for step, batch in enumerate(snake_case_						):
                     # We could avoid this line since we set the accelerator with `device_placement=True`.
                     batch.to(accelerator.device						)
                     with torch.no_grad():
                            lowercase__:							Tuple         =     model(**snake_case_						)
                     lowercase__:							int         =     outputs.logits.argmax(dim=-1						)
                     lowercase__    ,      lowercase__:							int         =     accelerator.gather_for_metrics((predictions, batch["labels"])						)
                     metric.add_batch(
                         predictions=snake_case_		,  references=snake_case_		,  )

              lowercase__:							Union[str, Any]         =     metric.compute()
              # Use accelerator.print to print only on the main process.
              accelerator.print(F"""epoch {epoch}:"""		,  snake_case_						)
              if args.with_tracking:
                     accelerator.log(
                         {
                             "accuracy": eval_metric["accuracy"],
                             "f1": eval_metric["f1"],
                             "train_loss": total_loss.item() / len(snake_case_						),
                             "epoch": epoch,
                         }		,  step=snake_case_		,  )

              if checkpointing_steps == "epoch":
                     lowercase__:							Optional[int]         =     F"""epoch_{epoch}"""
                     if args.output_dir is not None:
                            lowercase__:							List[str]         =     os.path.join(args.output_dir		,  snake_case_						)
                     accelerator.save_state(snake_case_						)

       if args.with_tracking:
              accelerator.end_training()






def 							A(    ):
       """simple docstring"""





       lowercase__:							List[str]         =     argparse.ArgumentParser(description="Simple example of training script."						)
       parser.add_argument(
           "--mixed_precision"		,  type=snake_case_		,  default=snake_case_		,  choices=["no", "fp16", "bf16", "fp8"]		,  help="Whether to use mixed precision. Choose"
           "between fp16 and bf16 (bfloat16). Bf16 requires PyTorch >= 1.10."
           "and an Nvidia Ampere GPU."		,  )
       parser.add_argument("--cpu"		,  action="store_true"		,  help="If passed, will train on the CPU."						)
       parser.add_argument(
           "--checkpointing_steps"		,  type=snake_case_		,  default=snake_case_		,  help="Whether the various states should be saved at the end of every n steps, or 'epoch' for each epoch."		,  )
       parser.add_argument(
           "--resume_from_checkpoint"		,  type=snake_case_		,  default=snake_case_		,  help="If the training should continue from a checkpoint folder."		,  )
       parser.add_argument(
           "--with_tracking"		,  action="store_true"		,  help="Whether to load in all available experiment trackers from the environment and use them for logging."		,  )
       parser.add_argument(
           "--output_dir"		,  type=snake_case_		,  default="."		,  help="Optional save directory where all checkpoint folders will be stored. Default is the current working directory."		,  )
       parser.add_argument(
           "--project_dir"		,  type=snake_case_		,  default="logs"		,  help="Location on where to store experiment tracking logs` and relevent project information"		,  )
       lowercase__:							Union[str, Any]         =     parser.parse_args()
       lowercase__:							Optional[Any]         =     {"lr": 2E-5, "num_epochs": 3, "seed": 42, "batch_size": 16}
       training_function(snake_case_		,  snake_case_						)


if __name__ == "__main__":
  main()












'''simple docstring'''






def 		a_(			lowerCamelCase ,					lowerCamelCase   )					->int:






       '''simple docstring'''




       if len(lowerCamelCase   ) < len(lowerCamelCase   ):
              return levenshtein_distance(lowerCamelCase ,					lowerCamelCase   )

       if len(lowerCamelCase   ) == 0:
              return len(lowerCamelCase   )

       lowercase	:		List[Any]    =   list(range(len(lowerCamelCase   ) + 1   )   )

       for i, ca in enumerate(lowerCamelCase   ):
              lowercase	:		Any    =   [i + 1]

              for j, ca in enumerate(lowerCamelCase   ):
                     # Calculate insertions, deletions and substitutions
                     lowercase	:		List[Any]    =   previous_row[j + 1] + 1
                     lowercase	:		str    =   current_row[j] + 1
                     lowercase	:		List[Any]    =   previous_row[j] + (ca != ca)

                     # Get the minimum to append to the current row
                     current_row.append(min(lowerCamelCase ,					lowerCamelCase ,					lowerCamelCase   )   )

              # Store the previous row
              lowercase	:		List[str]    =   current_row

       # Returns the last element (distance)
       return previous_row[-1]


if __name__ == "__main__":
      lowercase						:   Dict      						=							input('''Enter the first word:\n''').strip()
      lowercase						:   Tuple      						=							input('''Enter the second word:\n''').strip()

      lowercase						:   Tuple      						=							levenshtein_distance(first_word, second_word)
      print(f'Levenshtein distance between {first_word} and {second_word} is {result}')




