Show HN: Forbidden Fruit – Patch built-in Python objects

Probably for the same reason why reopening Ruby classes is used so much. "hello, world".capitalize looks nicer than capitalize("hello, world"), and it's more convenient for method chaining.

pekk• 13 years ago

If you are doing this for testing, it's already a feature of pytest: http://pytest.org/latest/monkeypatch.html

clarete4• 13 years ago

I might be wrong, but I don't think that it's actually possible to mock built-in objects (written in C, not in python) using pytest.

A very quick test would be trying to do something like this:

>>> monkeypatch(str, "blah", "bleh") >>> assert str.blah == "bleh"

I tried it here with no success though.

jacobolus• 13 years ago

What are the license implications of using GPLv3 code as part of a test suite?

clarete4• 13 years ago

I don't think that there's any implications for that, but I'll probably relicense this library as MIT or at least LGPL pretty soon.

I just used my default licence template, which defaults to GPL.

marcosmlopes• 13 years ago

Wow! Great news. It would be nice have this project under MIT license.

oellegaard• 13 years ago

While it is a cool project, I hope I never have to work on a project that use this. I hate when people overwrite built-ins, but that might just be me.

tekacs• 13 years ago

Particularly striking is how little (pure Python) code was required to do this (courtesy ctypes)!

A wonderful hack! :)

Edit: see https://github.com/clarete/forbiddenfruit/blob/master/forbid...

shabble• 13 years ago

c.f. http://perldoc.perl.org/functions/bless.html

daGrevis• 13 years ago

Look good! I would like to see more examples of how to use it in tests tho!

Show HN: Forbidden Fruit – Patch built-in Python objects

Related Stories