parameters: (value, cls=None)
return_statement: return cls(result)
docstring: Parses an HTTP Accept-* header.  This does not implement a complete
      valid algorithm but one that supports at least value and quality
      extraction.
  
      Returns a new :class:`Accept` object (basically a list of ``(value, quality)``
      tuples sorted by the quality with some additional accessor methods).
  
      The second parameter can be a subclass of :class:`Accept` that is created
      with the parsed values and returned.
  
      :param value: the accept header string to be parsed.
      :param cls: the wrapper class for the return value (can be
                           :class:`Accept` or a subclass thereof)
      :return: an instance of `cls`.
docstring_summary: Parses an HTTP Accept-* header.  This does not implement a complete
      valid algorithm but one that supports at least value and quality
      extraction.
docstring_tokens: Parses an HTTP Accept - * header . This does not implement a complete valid algorithm but one that supports at least value and quality extraction .
function: def parse_accept_header(value, cls=None):
      """Parses an HTTP Accept-* header.  This does not implement a complete
      valid algorithm but one that supports at least value and quality
      extraction.
  
      Returns a new :class:`Accept` object (basically a list of ``(value, quality)``
      tuples sorted by the quality with some additional accessor methods).
  
      The second parameter can be a subclass of :class:`Accept` that is created
      with the parsed values and returned.
  
      :param value: the accept header string to be parsed.
      :param cls: the wrapper class for the return value (can be
                           :class:`Accept` or a subclass thereof)
      :return: an instance of `cls`.
      """
      if cls is None:
          cls = Accept
  
      if not value:
          return cls(None)
  
      result = []
      for match in _accept_re.finditer(value):
          quality = match.group(2)
          if not quality:
              quality = 1
          else:
              quality = max(min(float(quality), 1), 0)
          result.append((match.group(1), quality))
      return cls(result)
function_tokens: def parse_accept_header ( value , cls = None ) : if cls is None : cls = Accept if not value : return cls ( None ) result = [ ] for match in _accept_re . finditer ( value ) : quality = match . group ( 2 ) if not quality : quality = 1 else : quality = max ( min ( float ( quality ) , 1 ) , 0 ) result . append ( ( match . group ( 1 ) , quality ) ) return cls ( result )