
from __future__ import annotations

from queue import Queue



class 	__lowerCAmelCase       :




 def __init__(  self			):



    '''simple docstring'''
    __lowerCamelCase  							=      {}




 def     lowerCamelCase (  self			):



    '''simple docstring'''





    for i in self.vertices:
       print(_UpperCamelCase		,			''' : '''		,			''' -> '''.join([str(_UpperCamelCase			) for j in self.vertices[i]]			)			)




 def     lowerCamelCase (  self		,			__UpperCAmelCase		,			__UpperCAmelCase			):



    '''simple docstring'''





    if from_vertex in self.vertices:
       self.vertices[from_vertex].append(_UpperCamelCase			)
    else:
       __lowerCamelCase  							=      [to_vertex]




 def     lowerCamelCase (  self		,			__UpperCAmelCase			):



    '''simple docstring'''
    __lowerCamelCase  							=      set()

    # create a first in first out queue to store all the vertices for BFS
    __lowerCamelCase  							=      Queue()

    # mark the source node as visited and enqueue it
    visited.add(_UpperCamelCase			)
    queue.put(_UpperCamelCase			)

    while not queue.empty():
       __lowerCamelCase  							=      queue.get()

       # loop through all adjacent vertex and enqueue it if not yet visited
       for adjacent_vertex in self.vertices[vertex]:
          if adjacent_vertex not in visited:
             queue.put(_UpperCamelCase			)
             visited.add(_UpperCamelCase			)
    return visited


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

  testmod(verbose=True)

  a_								=   Graph()
  g.add_edge(0, 1)
  g.add_edge(0, 2)
  g.add_edge(1, 2)
  g.add_edge(2, 0)
  g.add_edge(2, 3)
  g.add_edge(3, 3)

  g.print_graph()
  # 0  :  1 -> 2
  # 1  :  2
  # 2  :  0 -> 3
  # 3  :  3

  assert sorted(g.bfs(2)) == [0, 1, 2, 3]











import platform
from argparse import ArgumentParser

import huggingface_hub
import pandas
import pyarrow

from datasets import __version__ as version
from datasets.commands import BaseDatasetsCLICommand





def 						a__     (						_UpperCamelCase     :	Optional[Any]							):
   return EnvironmentCommand()





class 	__lowerCAmelCase       (		lowerCAmelCase__				):




 @staticmethod
 def     lowerCamelCase (  __UpperCAmelCase			):



    '''simple docstring'''
    __lowerCamelCase  							=      parser.add_parser('''env'''		,			help='''Print relevant system environment info.'''			)
    download_parser.set_defaults(func=__UpperCAmelCase			)




 def     lowerCamelCase (  self			):



    '''simple docstring'''
    __lowerCamelCase  							=      {
        '''`datasets` version''': version,
        '''Platform''': platform.platform(),
        '''Python version''': platform.python_version(),
        '''Huggingface_hub version''': huggingface_hub.__version__,
        '''PyArrow version''': pyarrow.__version__,
        '''Pandas version''': pandas.__version__,
    }

    print('''\nCopy-and-paste the text below in your GitHub issue.\n'''			)
    print(self.format_dict(__UpperCAmelCase			)			)

    return info




 @staticmethod
 def     lowerCamelCase (  __UpperCAmelCase			):



    '''simple docstring'''
    return "\n".join([F"""- {prop}: {val}""" for prop, val in d.items()]			) + "\n"






