





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    _UpperCAmelCase							:
      def __init__(		self      ,       a__      ,       a__       ):
         A_     :				List[Any]			      =	graph
         # mapping node to its parent in resulting breadth first tree
         A_     :				dict[str, str | None]			      =	{}
         A_     :				Union[str, Any]			      =	source_vertex
      def 		_lowerCamelCase      (		self       ):
         A_     :				str			      =	{self.source_vertex}
         A_     :				Optional[int]			      =	None
         A_     :				List[Any]			      =	[self.source_vertex]  # first in first out queue

         while queue:
            A_     :				str			      =	queue.pop(0       )
            for adjacent_vertex in self.graph[vertex]:
               if adjacent_vertex not in visited:
                  visited.add(a__       )
                  A_     :				List[Any]			      =	vertex
                  queue.append(a__       )






      def 		_lowerCamelCase      (		self      ,       a__       ):
         if target_vertex == self.source_vertex:
            return self.source_vertex

         A_     :				Optional[int]			      =	self.parent.get(a__       )
         if target_vertex_parent is None:
            A_     :				Dict			      =	(
                F"""No path from vertex: {self.source_vertex} to vertex: {target_vertex}"""
            )
            raise ValueError(a__       )

         return self.shortest_path(a__       ) + 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"""))













from typing import List

from .keymap import KEYMAP, get_character



def     _lowerCAmelCase		(  _lowerCAmelCase     ):
   '''simple docstring'''


   def decorator(_lowerCAmelCase     ):
      A_     :				List[Any]			      =	getattr(_lowerCAmelCase  ,"""handle_key"""  ,[]     )
      handle += [key]
      setattr(_lowerCAmelCase  ,"""handle_key"""  ,_lowerCAmelCase     )
      return func

   return decorator



def     _lowerCAmelCase		(  *_lowerCAmelCase     ):
   '''simple docstring'''


   def decorator(_lowerCAmelCase     ):
      A_     :				Tuple			      =	getattr(_lowerCAmelCase  ,"""handle_key"""  ,[]     )
      handle += keys
      setattr(_lowerCAmelCase  ,"""handle_key"""  ,_lowerCAmelCase     )
      return func

   return decorator

class    _UpperCAmelCase							(		_lowerCamelCase     ):
      def __new__(		cls      ,       a__      ,       a__      ,       a__       ):
         A_     :				Any			      =	super().__new__(cls      ,       a__      ,       a__      ,       a__       )
         if not hasattr(a__      ,       """key_handler"""       ):
            setattr(a__      ,       """key_handler"""      ,       {}       )
         setattr(a__      ,       """handle_input"""      ,       KeyHandler.handle_input       )

         for value in attrs.values():
            A_     :				Tuple			      =	getattr(a__      ,       """handle_key"""      ,       []       )
            for key in handled_keys:
               A_     :				Optional[Any]			      =	value
         return new_cls






      @staticmethod
      def 		_lowerCamelCase      (		cls       ):
         A_     :				List[str]			      =	get_character()
         if char != KEYMAP["undefined"]:
            A_     :				str			      =	ord(a__       )
         A_     :				List[str]			      =	cls.key_handler.get(a__       )
         if handler:
            A_     :				Optional[int]			      =	char
            return handler(cls       )
         else:
            return None






def     _lowerCAmelCase		(  cls     ):
   '''simple docstring'''


   return KeyHandler(cls.__name__  ,cls.__bases__  ,cls.__dict__.copy()     )






