code: def is_valid_url(url):
      
      regex = 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 bool(regex.match(url))
docs: Check if url is valid