






from typing import Callable, Optional

from .. import Features
from ..packaged_modules.generator.generator import Generator
from .abc import AbstractDatasetInputStream

class 						lowerCAmelCase   (       __a	):

					'''simple docstring'''

					def __init__(     self :		List[str]						,   __a :		Callable						,   __a :		Optional[Features] = None						,   __a :		str = None						,   __a :		bool = False						,   __a :		bool = False						,   __a :		Optional[dict] = None						,   __a :		Optional[int] = None						,   **__a :		int						,   )	->     Optional[Any]:


												"""simple docstring"""

												super().__init__(
												    features=__a						,   cache_dir=__a						,   keep_in_memory=__a						,   streaming=__a						,   num_proc=__a						,   **__a						,   )
												__lowercase					:							int			=   Generator(
												    cache_dir=__a						,   features=__a						,   generator=__a						,   gen_kwargs=__a						,   **__a						,   )



					def 					lowerCAmelCase (     self :		Optional[int]							)	->     List[str]:


												"""simple docstring"""

												if self.streaming:
																			__lowercase					:							Optional[int]			=   self.builder.as_streaming_dataset(split="""train"""							)
												# Build regular (map-style) dataset
												else:
																			__lowercase					:							List[str]			=   None
																			__lowercase					:							Any			=   None
																			__lowercase					:							Optional[Any]			=   None
																			__lowercase					:							Optional[Any]			=   None

																			self.builder.download_and_prepare(
																			    download_config=__a						,   download_mode=__a						,   verification_mode=__a						,   base_path=__a						,   num_proc=self.num_proc						,   )
																			__lowercase					:							str			=   self.builder.as_dataset(
																			    split="""train"""						,   verification_mode=__a						,   in_memory=self.keep_in_memory							)
												return dataset







lowerCamelCase       :       Tuple        =				{'''a''': ['''c''', '''b'''], '''b''': ['''d''', '''e'''], '''c''': [], '''d''': [], '''e''': []}
lowerCamelCase       :       int        =				['''a''', '''b''', '''c''', '''d''', '''e''']
def 					snake_case_						(   lowerCAmelCase_				:  Optional[int]				,				lowerCAmelCase_				:  str				,				lowerCAmelCase_				:  List[Any]					):
							__lowercase					:							Dict			=   start
							# add current to visited
							visited.append(lowerCAmelCase_					)
							__lowercase					:							Dict			=   edges[current]
							for neighbor in neighbors:
														# if neighbor not in visited, visit
														if neighbor not in visited:
																					__lowercase					:							List[Any]			=   topological_sort(lowerCAmelCase_				,				lowerCAmelCase_				,				lowerCAmelCase_					)
    # if all neighbors visited add current to sort
							sort.append(lowerCAmelCase_					)
							# if all vertices haven't been visited select a new one to visit
							if len(lowerCAmelCase_					) != len(lowerCAmelCase_					):
														for vertice in vertices:
																					if vertice not in visited:
																												__lowercase					:							Tuple			=   topological_sort(lowerCAmelCase_				,				lowerCAmelCase_				,				lowerCAmelCase_					)
    # return sort
							return sort


if __name__ == "__main__":
	lowerCamelCase       :       Any        =				topological_sort('''a''', [], [])
	print(sort)