

'''simple docstring'''

import itertools
from dataclasses import dataclass
from io import StringIO
from typing import Optional

import pyarrow as pa

import datasets
from datasets.features.features import require_storage_cast
from datasets.table import table_cast


lowerCAmelCase_     =      datasets.utils.logging.get_logger(__name__)







@dataclass
class lowerCamelCase   (    datasets.BuilderConfig				):
				snake_case_							     = None
				snake_case_							     = "utf-8"
				snake_case_							     = None
				snake_case_							     = 10 << 20  # 10MB
				snake_case_							     = False
				snake_case_							     = "line"







class lowerCamelCase   (    datasets.ArrowBasedBuilder				):
				snake_case_							     = TextConfig

				def 					_lowerCamelCase    (       self )    ->							Dict:
					return datasets.DatasetInfo(features=self.config.features )

				def 					_lowerCamelCase    (       self,						lowercase_ )    ->							Tuple:
					if not self.config.data_files:
						raise ValueError(F'''At least one data file must be specified, but got data_files={self.config.data_files}''' )
					snake_case							=					dl_manager.download_and_extract(self.config.data_files )
					if isinstance(lowercase_,						(str, list, tuple) ):
						snake_case							=					data_files
						if isinstance(lowercase_,						lowercase_ ):
							snake_case							=					[files]
						snake_case							=					[dl_manager.iter_files(lowercase_ ) for file in files]
						return [datasets.SplitGenerator(name=datasets.Split.TRAIN,						gen_kwargs={'files': files} )]
					snake_case							=					[]
					for split_name, files in data_files.items():
						if isinstance(lowercase_,						lowercase_ ):
							snake_case							=					[files]
						snake_case							=					[dl_manager.iter_files(lowercase_ ) for file in files]
						splits.append(datasets.SplitGenerator(name=lowercase_,						gen_kwargs={'files': files} ) )
					return splits

				def 					_lowerCamelCase    (       self,						lowercase_ )    ->							pa.Table:
					if self.config.features is not None:
						snake_case							=					self.config.features.arrow_schema
						if all(not require_storage_cast(lowercase_ ) for feature in self.config.features.values() ):
							# cheaper cast
							snake_case							=					pa_table.cast(lowercase_ )
						else:
							# more expensive cast; allows str <-> int/float or str to Audio for example
							snake_case							=					table_cast(lowercase_,						lowercase_ )
						return pa_table
					else:
						return pa_table.cast(pa.schema({'text': pa.string()} ) )






				def 					_lowerCamelCase    (       self,						lowercase_ )    ->							Union[str, Any]:
					snake_case							=					list(self.config.features ) if self.config.features is not None else ['text']
					for file_idx, file in enumerate(itertools.chain.from_iterable(lowercase_ ) ):
						# open in text mode, by default translates universal newlines ("\n", "\r\n" and "\r") into "\n"
						with open(lowercase_,						encoding=self.config.encoding,						errors=self.config.errors ) as f:
							if self.config.sample_by == "line":
								snake_case							=					0
								while True:
									snake_case							=					f.read(self.config.chunksize )
									if not batch:
										break
									batch += f.readline()  # finish current line
									# StringIO.readlines, by default splits only on "\n" (and keeps line breaks)
									snake_case							=					StringIO(lowercase_ ).readlines()
									if not self.config.keep_linebreaks:
										snake_case							=					[line.rstrip('\n' ) for line in batch]
									snake_case							=					pa.Table.from_arrays([pa.array(lowercase_ )],						names=lowercase_ )
									# Uncomment for debugging (will print the Arrow table size and elements)
									# logger.warning(f"pa_table: {pa_table} num rows: {pa_table.num_rows}")
									# logger.warning('\n'.join(str(pa_table.slice(i, 1).to_pydict()) for i in range(pa_table.num_rows)))
									yield (file_idx, batch_idx), self._cast_table(lowercase_ )
									batch_idx += 1
							elif self.config.sample_by == "paragraph":
								snake_case							=					0
								snake_case							=					''
								while True:
									snake_case							=					f.read(self.config.chunksize )
									if not new_batch:
										break
									batch += new_batch
									batch += f.readline()  # finish current line
									snake_case							=					batch.split('\n\n' )
									snake_case							=					pa.Table.from_arrays(
									    [pa.array([example for example in batch[:-1] if example] )],						names=lowercase_ )
									# Uncomment for debugging (will print the Arrow table size and elements)
									# logger.warning(f"pa_table: {pa_table} num rows: {pa_table.num_rows}")
									# logger.warning('\n'.join(str(pa_table.slice(i, 1).to_pydict()) for i in range(pa_table.num_rows)))
									yield (file_idx, batch_idx), self._cast_table(lowercase_ )
									batch_idx += 1
									snake_case							=					batch[-1]
								if batch:
									snake_case							=					pa.Table.from_arrays([pa.array([batch] )],						names=lowercase_ )
									yield (file_idx, batch_idx), self._cast_table(lowercase_ )
							elif self.config.sample_by == "document":
								snake_case							=					f.read()
								snake_case							=					pa.Table.from_arrays([pa.array([text] )],						names=lowercase_ )
								yield file_idx, self._cast_table(lowercase_ )








'''simple docstring'''

from .balanced_parentheses import balanced_parentheses
from .stack import Stack

def      __magic_name__							(			A				)      ->		int:
	return {"+": 1, "-": 1, "*": 2, "/": 2, "^": 3}.get(A       , -1				)

def      __magic_name__							(			A				)      ->		str:
	if not balanced_parentheses(A				):
		raise ValueError('Mismatched parentheses'				)
	snake_case							=					Stack()
	snake_case							=					[]
	for char in expression_str:
		if char.isalpha() or char.isdigit():
			postfix.append(A				)
		elif char == "(":
			stack.push(A				)
		elif char == ")":
			while not stack.is_empty() and stack.peek() != "(":
				postfix.append(stack.pop()				)
			stack.pop()
		else:
			while not stack.is_empty() and precedence(A				) <= precedence(stack.peek()				):
				postfix.append(stack.pop()				)
			stack.push(A				)
	while not stack.is_empty():
		postfix.append(stack.pop()				)
	return " ".join(A				)


if __name__ == "__main__":
						from doctest import testmod

						testmod()
						lowerCAmelCase_     =      "a+b*(c^d-e)^(f+g*h)-i"

						print("Infix to Postfix Notation demonstration:\n")
						print("Infix notation: " + expression)
						print("Postfix notation: " + infix_to_postfix(expression))





