def parse_bytes(bytes_str):
	conversions = {'B':1, 'KiB':1024, 'MiB':1024**2, 'GiB':1024**3, 'TiB':1024**4}
	#
	matching_conversions = [x for x in conversions if bytes_str.endswith(x)]
	if len(matching_conversions) > 0:
		# if any conversion suffix matched
		most_precise_match = max(matching_conversions, key=len)
		number = int(bytes_str[:-len(most_precise_match)])
		return number*conversions[most_precise_match]
	#
	return int(bytes_str)
#