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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_version():
 """ Simple function to extract the current version using regular expressions. """

    reg = re.compile(r'__version__ = [\'"]([^\'"]*)[\'"]')
    with open('requests_kerberos/__init__.py') as fd:
        matches = list(filter(lambda x: x, map(reg.match, fd)))

    if not matches:
        raise RuntimeError(
            'Could not find the version information for requests_kerberos'
            )

    return matches[0].group(1)