



'''simple docstring'''





from __future__ import annotations

_lowerCAmelCase										=     {
    '''A''': ['''B''', '''C''', '''E'''],
    '''B''': ['''A''', '''D''', '''E'''],
    '''C''': ['''A''', '''F''', '''G'''],
    '''D''': ['''B'''],
    '''E''': ['''A''', '''B''', '''D'''],
    '''F''': ['''C'''],
    '''G''': ['''C'''],
}






class 	lowerCAmelCase_:
  '''simple docstring'''




  def __init__(   self  ,__UpperCAmelCase  ,__UpperCAmelCase				)   ->		None:
      lowerCAmelCase__			:  str											= graph
      # mapping node to its parent in resulting breadth first tree
      lowerCAmelCase__			:  dict[str, str | None]											= {}
      lowerCAmelCase__			:  Dict											= source_vertex




  def 							UpperCAmelCase_     (   self				)   ->		None:
      lowerCAmelCase__			:  List[Any]											= {self.source_vertex}
      lowerCAmelCase__			:  Tuple											= None
      lowerCAmelCase__			:  Dict											= [self.source_vertex]  # first in first out queue

      while queue:
          lowerCAmelCase__			:  Any											= queue.pop(0				)
          for adjacent_vertex in self.graph[vertex]:
              if adjacent_vertex not in visited:
                  visited.add(__UpperCAmelCase				)
                  lowerCAmelCase__			:  Optional[int]											= vertex
                  queue.append(__UpperCAmelCase				)






  def 							UpperCAmelCase_     (   self  ,__UpperCAmelCase				)   ->		str:
      if target_vertex == self.source_vertex:
          return self.source_vertex

      lowerCAmelCase__			:  Dict											= self.parent.get(__UpperCAmelCase				)
      if target_vertex_parent is None:
          lowerCAmelCase__			:  Tuple											= (
              F"""No path from vertex: {self.source_vertex} to vertex: {target_vertex}"""
          )
          raise ValueError(__UpperCAmelCase				)

      return self.shortest_path(__UpperCAmelCase				) + F"""->{target_vertex}"""


if __name__ == "__main__":
 _lowerCAmelCase										=     Graph(graph, '''G''')
 g.breath_first_search()
 print(g.shortest_path('''D'''))
 print(g.shortest_path('''G'''))
 print(g.shortest_path('''Foo'''))







'''simple docstring'''





import copy
from dataclasses import dataclass
from pathlib import Path
from typing import Dict, Optional, Union






@dataclass
class 	lowerCAmelCase_:
  '''simple docstring'''




  __lowercase							:				Optional[Union[str, Path]]           =				None
  __lowercase							:				bool           =				False
  __lowercase							:				bool           =				False
  __lowercase							:				bool           =				False
  __lowercase							:				Optional[Dict]           =				None
  __lowercase							:				Optional[str]           =				None
  __lowercase							:				bool           =				False
  __lowercase							:				bool           =				False
  __lowercase							:				bool           =				False
  __lowercase							:				bool           =				True
  __lowercase							:				Optional[int]           =				None
  __lowercase							:				int           =				1
  __lowercase							:				Optional[Union[str, bool]]           =				None
  __lowercase							:				bool           =				False
  __lowercase							:				Optional[Dict]           =				None
  __lowercase							:				Optional[str]           =				None




  def 							UpperCAmelCase_     (   self				)   ->		"DownloadConfig":
      return self.__class__(**{k: copy.deepcopy(__UpperCAmelCase				) for k, v in self.__dict__.items()}				)


