def vc_generator(data_dict, keys_dict={'last_name middle_name first_name title': 'N:','address': 'ADR:', 'email': 'EMAIL;INTERNET:', 'phone_number': 'TEL:'}):
  returnString = "BEGIN:VCARD\n"
  for i in keys_dict:
    final_str = ";".join(data_dict[key] if key in data_dict else '' for key in i.split(' '))
    if not len(final_str):
      continue
    returnString = returnString + "{0}{1}\n".format(keys_dict[i], final_str)
  return returnString + "END:VCARD";