parameters: (self, rel)
return_statement: return None
docstring: Returns the URL in a link with the desired rel value.
docstring_summary: Returns the URL in a link with the desired rel value.
docstring_tokens: Returns the URL in a link with the desired rel value .
function: def find_url(self, rel):
      """Returns the URL in a link with the desired rel value."""
      for link in self.link:
        if link.rel == rel and link.href:
          return link.href
      return None
function_tokens: def find_url ( self , rel ) : for link in self . link : if link . rel == rel and link . href : return link . href return None