


from __future__ import annotations






def 					lowerCamelCase_   (	_a	):




		"""simple docstring"""






		if not nums:
				raise ValueError('''List is empty'''	)
		return sum(lowerCAmelCase__	) / len(lowerCAmelCase__	)


if __name__ == "__main__":
		import doctest

		doctest.testmod()






def 					lowerCamelCase_   (	_a	):




		"""simple docstring"""






		if number < 0:
				raise ValueError('''number must not be negative'''	)
		return number & (number - 1) == 0


if __name__ == "__main__":
		import doctest

		doctest.testmod()




