werkzeug.parse_set_header¶

werkzeug.parse_set_header(value, on_update=None)[source]¶

Parse a set-like header and return a HeaderSet object:

>>> hs = parse_set_header('token, "quoted value"')

The return value is an object that treats the items case-insensitively and keeps the order of the items:

>>> 'TOKEN' in hs
True
>>> hs.index('quoted value')
1
>>> hs
HeaderSet(['token', 'quoted value'])

To create a header from the HeaderSet again, use the dump_header() function.

Parameters:	value – a set header to be parsed. on_update – an optional callable that is called every time a value on the HeaderSet object is changed.
Returns:	a HeaderSet