

'''simple docstring'''







__lowerCamelCase						    =      {
    '''A''': ['''B''', '''C''', '''E'''],
    '''B''': ['''A''', '''D''', '''E'''],
    '''C''': ['''A''', '''F''', '''G'''],
    '''D''': ['''B'''],
    '''E''': ['''A''', '''B''', '''D'''],
    '''F''': ['''C'''],
    '''G''': ['''C'''],
}
def  UpperCAmelCase__      ( UpperCAmelCase__,    UpperCAmelCase__,    UpperCAmelCase__			)     ->     list[str]:
       A_		   = set()
       # keep track of all the paths to be checked
       A_		   = [[start]]

       # return path if start is goal
       if start == goal:
              return [start]

       # keeps looping until all possible paths have been checked
       while queue:
              # pop the first path from the queue
              A_		   = queue.pop(0			)
              # get the last node from the path
              A_		   = path[-1]
              if node not in explored:
                     A_		   = graph[node]
                     # go through all neighbour nodes, construct a new path and
                     # push it into the queue
                     for neighbour in neighbours:
                            A_		   = list(UpperCAmelCase__			)
                            new_path.append(UpperCAmelCase__			)
                            queue.append(UpperCAmelCase__			)
                            # return path if neighbour is goal
                            if neighbour == goal:
                                   return new_path

            # mark node as explored
                     explored.add(UpperCAmelCase__			)

    # in case there's no path between the 2 nodes
       return []
def  UpperCAmelCase__      ( UpperCAmelCase__,    UpperCAmelCase__,    UpperCAmelCase__			)     ->     int:
       if not graph or start not in graph or target not in graph:
              return -1
       if start == target:
              return 0
       A_		   = [start]
       A_		   = set(UpperCAmelCase__			)
       # Keep tab on distances from `start` node.
       A_		   = {start: 0, target: -1}
       while queue:
              A_		   = queue.pop(0			)
              if node == target:
                     A_		   = (
                         dist[node] if dist[target] == -1 else min(dist[target],    dist[node]			)
                     )
              for adjacent in graph[node]:
                     if adjacent not in visited:
                            visited.add(UpperCAmelCase__			)
                            queue.append(UpperCAmelCase__			)
                            A_		   = dist[node] + 1
       return dist[target]


if __name__ == "__main__":
      print(bfs_shortest_path(demo_graph, '''G''', '''D'''))  # returns ['G', 'C', 'A', 'B', 'D']
      print(bfs_shortest_path_distance(demo_graph, '''G''', '''D'''))  # returns 4



'''simple docstring'''







import multiprocessing
from typing import TYPE_CHECKING, Optional, Union

from .. import Dataset, Features, config
from ..formatting import query_table
from ..packaged_modules.sql.sql import Sql
from ..utils import logging
from .abc import AbstractDatasetInputStream


if TYPE_CHECKING:
      import sqlitea

      import sqlalchemy


class    A__ ( _snake_case     ):



    def __init__(   self						,			UpperCamelCase__						,			UpperCamelCase__						,			UpperCamelCase__ = None						,			UpperCamelCase__ = None						,			UpperCamelCase__ = False						,			**UpperCamelCase__						,			)  -> Optional[Any]:





           '''simple docstring'''
           super().__init__(features=UpperCamelCase__						,			cache_dir=UpperCamelCase__						,			keep_in_memory=UpperCamelCase__						,			**UpperCamelCase__    )
           A_		   = Sql(
               cache_dir=UpperCamelCase__						,			features=UpperCamelCase__						,			sql=UpperCamelCase__						,			con=UpperCamelCase__						,			**UpperCamelCase__						,			)







    def    snake_case_     (   self    )  -> Optional[Any]:





           '''simple docstring'''
           A_		   = None
           A_		   = None
           A_		   = None
           A_		   = None

           self.builder.download_and_prepare(
               download_config=UpperCamelCase__						,			download_mode=UpperCamelCase__						,			verification_mode=UpperCamelCase__						,			base_path=UpperCamelCase__						,			)

           # Build dataset for splits
           A_		   = self.builder.as_dataset(
               split="""train"""						,			verification_mode=UpperCamelCase__						,			in_memory=self.keep_in_memory    )
           return dataset


class    A__ :



    def __init__(   self						,			UpperCamelCase__						,			UpperCamelCase__						,			UpperCamelCase__						,			UpperCamelCase__ = None						,			UpperCamelCase__ = None						,			**UpperCamelCase__						,			)  -> List[Any]:





           '''simple docstring'''
           if num_proc is not None and num_proc <= 0:
                  raise ValueError(f'''num_proc {num_proc} must be an integer > 0.'''    )

           A_		   = dataset
           A_		   = name
           A_		   = con
           A_		   = batch_size if batch_size else config.DEFAULT_MAX_BATCH_SIZE
           A_		   = num_proc
           A_		   = to_sql_kwargs



    def    snake_case_     (   self    )  -> int:





           '''simple docstring'''
           A_		   = self.to_sql_kwargs.pop("""sql"""						,			UpperCamelCase__    )
           A_		   = self.to_sql_kwargs.pop("""con"""						,			UpperCamelCase__    )
           A_		   = self.to_sql_kwargs.pop("""index"""						,			UpperCamelCase__    )

           A_		   = self._write(index=UpperCamelCase__						,			**self.to_sql_kwargs    )
           return written



    def    snake_case_     (   self						,			UpperCamelCase__    )  -> Union[str, Any]:





           '''simple docstring'''
           A_   ,     A_   ,     A_		   = args
           A_		   = {**to_sql_kwargs, """if_exists""": """append"""} if offset > 0 else to_sql_kwargs
           A_		   = query_table(
               table=self.dataset.data						,			key=slice(UpperCamelCase__						,			offset + self.batch_size    )						,			indices=self.dataset._indices						,			)
           A_		   = batch.to_pandas()
           A_		   = df.to_sql(self.name						,			self.con						,			index=UpperCamelCase__						,			**UpperCamelCase__    )
           return num_rows or len(UpperCamelCase__    )







    def    snake_case_     (   self						,			UpperCamelCase__						,			**UpperCamelCase__    )  -> int:





           '''simple docstring'''
           A_		   = 0

           if self.num_proc is None or self.num_proc == 1:
                  for offset in logging.tqdm(
                      range(0						,			len(self.dataset    )						,			self.batch_size    )						,			unit="""ba"""						,			disable=not logging.is_progress_bar_enabled()						,			desc="""Creating SQL from Arrow format"""						,			):
                         written += self._batch_sql((offset, index, to_sql_kwargs)    )
           else:
                  A_   ,     A_		   = len(self.dataset    ), self.batch_size
                  with multiprocessing.Pool(self.num_proc    ) as pool:
                         for num_rows in logging.tqdm(
                             pool.imap(
                                 self._batch_sql						,			[(offset, index, to_sql_kwargs) for offset in range(0						,			UpperCamelCase__						,			UpperCamelCase__    )]						,			)						,			total=(num_rows // batch_size) + 1 if num_rows % batch_size else num_rows // batch_size						,			unit="""ba"""						,			disable=not logging.is_progress_bar_enabled()						,			desc="""Creating SQL from Arrow format"""						,			):
                                written += num_rows

           return written
