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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 ValidateCertificateHostname(cert, hostname):
 """Validates that a given hostname is valid for an SSL certificate. Args: cert: A dictionary representing an SSL certificate. hostname: The hostname to test. Returns: bool: Whether or not the hostname is valid for this certificate. """

  hosts = GetValidHostsForCert(cert)
  boto.log.debug(
      "validating server certificate: hostname=%s, certificate hosts=%s",
      hostname, hosts)
  for host in hosts:
    host_re = host.replace('.', '\.').replace('*', '[^.]*')
    if re.search('^%s$' % (host_re,), hostname, re.I):
      return True
  return False