Howdy all - I have an app where I am using functools.partial to bundle up jobs to do, where a job is defined as a callable + args. In one case, I wanted to keep track of whether I had previously seen a job, so I started putting them into a set... only to find out that partials never test equal to each other:
>>> import operator >>> from functools import partial >>> p1 = partial(operator.add) >>> p2 = partial(operator.add) >>> p1 == p2 False >>> seen = set();seen.add(p1) >>> p2 in seen False I created a subclass of functools.partial that provides appropriate __eq__ and __hash__ methods, so that this works as expected. I called the subclass a Job: >>> j1 = Job(operator.add) >>> j2 = Job(operator.add) >>> j1 == j2 True >>> seen = set();seen.add(j1) >>> j2 in seen True >>> j1 is j2 False While I was at it, I also added a nice repr. Would this group be interested in a patch, or is this not interesting? Thanks, Van _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
