ernest wrote: > The operator module provides separate functions for > "in place" operations, such as iadd(), isub(), etc. > However, it appears that these functions don't really > do the operation in place: > > In [34]: a = 4 > > In [35]: operator.iadd(a, 3) > Out[35]: 7 > > In [36]: a > Out[36]: 4 > > So, what's the point? If you have to make the > assignment yourself... I don't understand.
Integers are immutable, and for instances a of immutable types a += b is equivalent to a = a + b For mutable types like list add() and iadd() may differ: >>> a = ["first"] >>> operator.iadd(a, [42]) ['first', 42] >>> a ['first', 42] >>> a = ["first"] >>> operator.add(a, [42]) ['first', 42] >>> a ['first'] Peter -- http://mail.python.org/mailman/listinfo/python-list
