code: def convert_invalid_url(url):
      
      regex_valid_url = re.compile(
          r'^(?:http|ftp)s?://' # http:// or https://
          r'(?:(?:[A-Z0-9](?:[A-Z0-9-]{0,61}[A-Z0-9])?\.)+(?:[A-Z]{2,6}\.?|[A-Z0-9-]{2,}\.?)|' #domain...
          r'localhost|' #localhost...
          r'\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})' # ...or ip
          r'(?::\d+)?' # optional port
          r'(?:/?|[/?]\S+)$', re.IGNORECASE)
  
      return url if regex_valid_url.match(url) else 'http://{}'.format(url)
docs: Convert invalid url with adding extra 'http://' schema into it
  
      :param url:
      :return: