I just discovered the following behavior, but can't find any documentation about it:
>>> list = [] >>> list = list + 'abc' Traceback (most recent call last): File "<stdin>", line 1, in ? TypeError: can only concatenate list (not "str") to list but: >>> list = [] >>> list += 'abc' >>> list ['a', 'b', 'c'] Is this a special characteristic that has been added to the augmented assignment operator +=; or is it an automatic consequence of += assignment being performed'in place'? (Tho I can't see how it could be...) It just seems very un-Pythonesque to be able to successfully concatenate objects of different types like this. And it seems very inconsistent with standard assignment. Indeed, the Python Reference Manual, section 6.3.1 states: "With the exception of assigning to tuples and multiple targets in a single statement, the assignment done by augmented assignment statements is handled the same way as normal assignments. Similarly, with the exception of the possible in-place behavior, the binary operation performed by augmented assignment is the same as the normal binary operations." ...which is patently not the case here. I was scandalized lol! _______________________________________________ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
