def download_file(self, Bucket, Key, Filename, ExtraArgs=None, Callback=None, Config=None):
 with S3Transfer(self, Config) as transfer:
  return transfer.download_file(bucket=Bucket, key=Key, filename=Filename, extra_args=ExtraArgs, callback=Callback)

def download_file ( self , Bucket , Key , Filename , ExtraArgs = None , Callback = None , Config = None ) : with S3Transfer ( self , Config ) as transfer : return transfer . download_file ( bucket = Bucket , key = Key , filename = Filename , extra_args = ExtraArgs , callback = Callback )
download a file .