





# Lint as: python3
import itertools
import os
import re


UpperCamelCase__   : Tuple					  = re.compile(r"""([A-Z]+)([A-Z][a-z])""")
UpperCamelCase__   : Dict					  = re.compile(r"""([a-z\d])([A-Z])""")

UpperCamelCase__   : Union[str, Any]					  = re.compile(r"""(?<!_)_(?!_)""")
UpperCamelCase__   : List[str]					  = re.compile(r"""(_{2,})""")

UpperCamelCase__   : int					  = r"""^\w+(\.\w+)*$"""

UpperCamelCase__   : List[Any]					  = r"""<>:/\|?*"""




def    A_(			A   ):
	UpperCAmelCase_								=     _uppercase_uppercase_re.sub(R"""\1_\2"""				,      A   )
	UpperCAmelCase_								=     _lowercase_uppercase_re.sub(R"""\1_\2"""				,      A   )
	return name.lower()




def    A_(			A   ):
	UpperCAmelCase_								=     _single_underscore_re.split(A   )
	UpperCAmelCase_								=     [_multiple_underscores_re.split(A   ) for n in name]
	return "".join(n.capitalize() for n in itertools.chain.from_iterable(A   ) if n != """"""   )




def    A_(			A   ):
	if os.path.basename(A   ) != name:
		raise ValueError(f"""Should be a dataset name, not a path: {name}"""   )
	return camelcase_to_snakecase(A   )




def    A_(			A				,      A   ):
	if os.path.basename(A   ) != name:
		raise ValueError(f"""Should be a dataset name, not a path: {name}"""   )
	if not re.match(_split_re				,      A   ):
		raise ValueError(f"""Split name should match '{_split_re}'' but got '{split}'."""   )
	return f"""{filename_prefix_for_name(A   )}-{split}"""




def    A_(			A				,      A				,      A				,      A=None   ):
	UpperCAmelCase_								=     filename_prefix_for_split(A				,      A   )
	if filetype_suffix:
		prefix += f""".{filetype_suffix}"""
	UpperCAmelCase_								=     os.path.join(A				,      A   )
	return f"""{filepath}*"""




def    A_(			A				,      A				,      A				,      A=None				,      A=None   ):
	UpperCAmelCase_								=     filename_prefix_for_split(A				,      A   )
	UpperCAmelCase_								=     os.path.join(A				,      A   )

	if shard_lengths:
		UpperCAmelCase_								=     len(A   )
		UpperCAmelCase_								=     [f"""{prefix}-{shard_id:05d}-of-{num_shards:05d}""" for shard_id in range(A   )]
		if filetype_suffix:
			UpperCAmelCase_								=     [filename + f""".{filetype_suffix}""" for filename in filenames]
		return filenames
	else:
		UpperCAmelCase_								=     prefix
		if filetype_suffix:
			filename += f""".{filetype_suffix}"""
		return [filename]









from __future__ import annotations




def    A_(			A   ):
	if not nums:
		raise ValueError("""List is empty"""   )
	return sum(A   ) / len(A   )


if __name__ == "__main__":
				import doctest

				doctest.testmod()


