On Wed, 20 Sep 2017 03:22 am, Chris Angelico wrote: > On Wed, Sep 20, 2017 at 2:20 AM, Steve D'Aprano > <steve+pyt...@pearwood.info> wrote: >> I can only think of four operations which are plausibly universal: >> >> Identity: compare two operands for identity. In this case, the type of the >> object is irrelevant. >> >> Kind: interrogate an object to find out what kind of thing it is (what class >> or type it is). In Python we have type(obj) and isinstance(x, Type), plus a >> slightly more specialised version issubclass. >> >> Convert to a string or human-readable representation. >> >> And test whether an object is truthy or falsey. > > Equality checks are also close to universal. If you ask if this list > is equal to that timestamp, you don't get an exception, you get False.
Ah yes! Good one, and an obvious one. Asking whether two things are equal/unequal should be universal to. -- Steve “Cheer up,” they said, “things could be worse.” So I cheered up, and sure enough, things got worse. -- https://mail.python.org/mailman/listinfo/python-list
