code: def check_whitelist(host, whitelist):
      ''' Check a given request host against a whitelist.
  
      Args:
          host (str) :
              A host string to compare against a whitelist.
  
              If the host does not specify a port, then ``":80"`` is implicitly
              assumed.
  
          whitelist (seq[str]) :
              A list of host patterns to match against
  
      Returns:
          ``True``, if ``host`` matches any pattern in ``whitelist``, otherwise
          ``False``
  
       '''
      if ':' not in host:
          host = host + ':80'
  
      if host in whitelist:
          return True
  
      return any(match_host(host, pattern) for pattern in whitelistf check_whitelist(host, whitelist):
      ''' Check a given request host against a whitelist.
  
      Args:
          host (str) :
              A host string to compare against a whitelist.
  
              If the host does not specify a port, then ``":80"`` is implicitly
              assumed.
  
          whitelist (seq[str]) :
              A list of host patterns to match against
  
      Returns:
          ``True``, if ``host`` matches any pattern in ``whitelist``, otherwise
          ``False``
  
       '''
      if ':' not in host:
          host = host + ':80'
  
      if host in whitelist:
          return True
  
      return any(match_host(host, pattern) for pattern in whitelist)
docs: Check a given request host against a whitelist.
  
      Args:
          host (str) :
              A host string to compare against a whitelist.
  
              If the host does not specify a port, then ``":80"`` is implicitly
              assumed.
  
          whitelist (seq[str]) :
              A list of host patterns to match against
  
      Returns:
          ``True``, if ``host`` matches any pattern in ``whitelist``, otherwise
          ``False``