






from dataclasses import dataclass
from typing import Callable, Optional

import datasets
@dataclass
class        __snake_case(					datasets.BuilderConfig      ):
 lowercase :       Optional[Callable]		      =		None
 lowercase :       Optional[dict]		      =		None
 lowercase :       Optional[datasets.Features]		      =		None



 def 						UpperCAmelCase    (	self   :   int	):

    """simple docstring"""






    assert self.generator is not None, "generator must be specified"

    if self.gen_kwargs is None:
       lowercase__						:	List[Any]         = {}
class        __snake_case(					datasets.GeneratorBasedBuilder      ):
 lowercase :       Dict		      =		GeneratorConfig



 def 						UpperCAmelCase    (	self   :   Any	):

    """simple docstring"""






    return datasets.DatasetInfo(features=self.config.features	)



 def 						UpperCAmelCase    (	self   :   List[str] ,		UpperCAmelCase__   :   Optional[int]	):

    """simple docstring"""






    return [datasets.SplitGenerator(name=datasets.Split.TRAIN ,		gen_kwargs=self.config.gen_kwargs	)]







 def 						UpperCAmelCase    (	self   :   Dict ,		**UpperCAmelCase__   :   List[str]	):

    """simple docstring"""






    for idx, ex in enumerate(self.config.generator(**UpperCAmelCase__	)	):
       yield idx, ex










from __future__ import annotations

from collections.abc import Iterator
from typing import Any
class        __snake_case:



 def __init__(	self   :   Union[str, Any] ,		UpperCAmelCase__   :   Any	):

    """simple docstring"""






    lowercase__						:	Any         = data
    lowercase__						:	Node | None         = None







 def __str__(	self   :   Dict	):

    """simple docstring"""






    return f'''{self.data}'''
class        __snake_case:



 def __init__(	self   :   Optional[Any]	):

    """simple docstring"""






    lowercase__						:	Node | None         = None
    lowercase__						:	Node | None         = None



 def __iter__(	self   :   Any	):

    """simple docstring"""






    lowercase__						:	Any         = self.front
    while node:
       yield node.data
       lowercase__						:	List[str]         = node.next



 def __len__(	self   :   Union[str, Any]	):

    """simple docstring"""






    return len(tuple(iter(self	)	)	)



 def __str__(	self   :   Optional[Any]	):

    """simple docstring"""






    return " <- ".join(str(UpperCAmelCase__	) for item in self	)



 def 						UpperCAmelCase    (	self   :   List[str]	):

    """simple docstring"""






    return len(self	) == 0



 def 						UpperCAmelCase    (	self   :   Optional[int] ,		UpperCAmelCase__   :   Any	):

    """simple docstring"""






    lowercase__						:	List[str]         = Node(UpperCAmelCase__	)
    if self.is_empty():
       lowercase__						:	List[Any]         = node
    else:
       assert isinstance(self.rear ,		UpperCAmelCase__	)
       lowercase__						:	Any         = node
       lowercase__						:	Union[str, Any]         = node



 def 						UpperCAmelCase    (	self   :   List[Any]	):

    """simple docstring"""






    if self.is_empty():
       raise IndexError("""dequeue from empty queue"""	)
    assert isinstance(self.front ,		UpperCAmelCase__	)
    lowercase__						:	Tuple         = self.front
    lowercase__						:	Any         = self.front.next
    if self.front is None:
       lowercase__						:	List[Any]         = None
    return node.data







 def 						UpperCAmelCase    (	self   :   Optional[Any]	):

    """simple docstring"""






    lowercase__						:	List[Any]         = None


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

 testmod()


