code: def is_address_in_network(network, address):
      
      try:
          network = netaddr.IPNetwork(network)
      except (netaddr.core.AddrFormatError, ValueError):
          raise ValueError("Network (%s) is not in CIDR presentation format" %
                           network)
  
      try:
          address = netaddr.IPAddress(address)
      except (netaddr.core.AddrFormatError, ValueError):
          raise ValueError("Address (%s) is not in correct presentation format" %
                           address)
  
      if address in network:
          return True
      else:
          return False
docs: Determine whether the provided address is within a network range.
  
      :param network (str): CIDR presentation format. For example,
          '192.168.1.0/24'.
      :param address: An individual IPv4 or IPv6 address without a net
          mask or subnet prefix. For example, '192.168.1.1'.
      :returns boolean: Flag indicating whether address is in network.