'''simple docstring'''

from __future__ import annotations

from typing import Generic, TypeVar

_A      :				str 				=    TypeVar('''T''')







class     _lowercase					(    Generic[T]      ):


	'''simple docstring'''






	def __init__(				self       :     Union[str, Any]				,	SCREAMING_SNAKE_CASE__       :     T							)  ->   int:
		__lowerCAmelCase    							=						data  # Assign data
		__lowerCAmelCase    							=						None  # Initialize next as null
		__lowerCAmelCase    							=						None  # Initialize prev as null







class     _lowercase					(    Generic[T]      ):


	'''simple docstring'''






	def __init__(				self       :     Any							)  ->   None:
		__lowerCAmelCase    							=						None
	def a (				self       :     Optional[int]				,	SCREAMING_SNAKE_CASE__       :     T							)  ->   None:
		if self.head is None:
			__lowerCAmelCase    							=						Node(SCREAMING_SNAKE_CASE__							)
		else:
			__lowerCAmelCase    							=						Node(SCREAMING_SNAKE_CASE__							)
			__lowerCAmelCase    							=						new_node
			__lowerCAmelCase    							=						self.head
			__lowerCAmelCase    							=						None
			__lowerCAmelCase    							=						new_node
	def a (				self       :     List[Any]							)  ->   T | None:
		if self.head is None:
			return None
		else:
			assert self.head is not None
			__lowerCAmelCase    							=						self.head.data
			__lowerCAmelCase    							=						self.head.next
			if self.head is not None:
				__lowerCAmelCase    							=						None
			return temp
	def a (				self       :     Optional[Any]							)  ->   T | None:
		return self.head.data if self.head is not None else None
	def __len__(				self       :     Union[str, Any]							)  ->   int:
		__lowerCAmelCase    							=						self.head
		__lowerCAmelCase    							=						0
		while temp is not None:
			count += 1
			__lowerCAmelCase    							=						temp.next
		return count
	def a (				self       :     List[str]							)  ->   bool:
		return self.head is None





	def a (				self       :     Any							)  ->   None:
		print("""stack elements are:"""							)
		__lowerCAmelCase    							=						self.head
		while temp is not None:
			print(temp.data				,	end="""->"""							)
			__lowerCAmelCase    							=						temp.next


# Code execution starts here
if __name__ == "__main__":
	# Start with the empty stack
	_A      :				Stack[int] 				=    Stack()

	# Insert 4 at the beginning. So stack becomes 4->None
	print('''Stack operations using Doubly LinkedList''')
	stack.push(4)

	# Insert 5 at the beginning. So stack becomes 4->5->None
	stack.push(5)

	# Insert 6 at the beginning. So stack becomes 4->5->6->None
	stack.push(6)

	# Insert 7 at the beginning. So stack becomes 4->5->6->7->None
	stack.push(7)

	# Print the stack
	stack.print_stack()

	# Print the top element
	print('''\nTop element is ''', stack.top())

	# Print the stack size
	print('''Size of the stack is ''', len(stack))

	# pop the top element
	stack.pop()

	# pop the top element
	stack.pop()

	# two elements have now been popped off
	stack.print_stack()

	# Print True if the stack is empty else False
	print('''\nstack is empty:''', stack.is_empty())







'''simple docstring'''

from unittest.mock import patch

import datasets
from datasets import Dataset







def 					UpperCamelCase_						( ) ->					Dict:






 '''simple docstring'''

 __lowerCAmelCase    							=						Dataset.from_dict({"""col_1""": [3, 2, 0, 1]}				)

 with patch("""tqdm.auto.tqdm"""				) as mock_tqdm:
  datasets.disable_progress_bar()
  dset.map(lambda snake_case_				: {"col_2": x["col_1"] + 1}				)
  mock_tqdm.assert_not_called()

  mock_tqdm.reset_mock()

  datasets.enable_progress_bar()
  dset.map(lambda snake_case_				: {"col_2": x["col_1"] + 1}				)
  mock_tqdm.assert_called()






