code: def render(value):
      
      # Empty urls
      if not value:  # use case: wild card imports
          return r'^$'
  
      if value[0] != beginning:
          value = beginning + value
  
      if value[-1] != end:
          value += end
  
      return value
docs: This function finishes the url pattern creation by adding starting
      character ^ end possibly by adding end character at the end
  
      :param value: naive URL value
      :return: raw string