def version_str_to_tuple(version_str):

import re

import sys

if version_str == 'HEAD':

return (sys.maxsize, sys.maxsize, sys.maxsize, sys.maxsize)

m = re.match(r'(\d+)\.(\d+)(\.(\d+))?(b(\d+))?', version_str)

if m is None:

raise ValueError("Bad version string %r" % version_str)

major = int(m.group(1))

minor = int(m.group(2))

patch = int(m.group(4) or 0)

beta = int(m.group(6) or sys.maxsize)

return (major, minor, patch, beta)