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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 verify_gpg_version():
 """Make sure that the installed GnuPG is not too old."""

    existing_gpg = keyring.gpg_version().decode('ascii')
    required_gpg = '>=2.1.11'
    msg = 'Existing GnuPG has version "{}" ({} required)'.format(existing_gpg,
                                                                 required_gpg)
    if not semver.match(existing_gpg, required_gpg):
        log.error(msg)