[issue2706] datetime: define division timedelta/timedelta
Jess Austin
report at bugs.python.org
Wed Mar 25 01:04:24 CET 2009
Jess Austin <jess.austin at gmail.com> added the comment:
A comment on the two most recent patches... For both of these, we can
do the following:
>>> from datetime import timedelta
>>> td = timedelta(12)
>>> td
datetime.timedelta(12)
>>> td //= 3
>>> td
datetime.timedelta(4)
>>> td //= timedelta(2)
>>> td
2 # CHANGED VARIABLE TYPE!
I think the last operation will trap unsuspecting programmers, and
provide no benefit for the savvy. There really is no reason to allow an
in-place operation like this to change the type of the variable so
drastically. (That is, I realize a similar thing could happen with ints
and floats, but it seems worse with timedeltas and ints.) I feel the
last operation should raise a TypeError, even though it would be quite
valid for a non-in-place operation.
----------
nosy: +jess.austin
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