On Fri, 04 Oct 2013 11:49:26 +0200, Alain Ketterlin wrote:
> I think allowing rebinding of function names is extremely strange,
It's not, it's quite common. Functions in Python are first-class values,
and we can do things like this:
from somelibrary import somethingwithalonglongname as shortname
def inorder(tree, op=print):
# Walk the tree in infix order, doing op to each node.
process(tree.left, op)
op(tree.payload)
process(tree.right, op)
_len = len
def len(obj):
do_something_first()
return _len(obj)
Now, the first two aren't the same sort of function-rebinding that you're
talking about, or that were shown in your post, but the third is. What is
unusual though is rebinding a function from within itself:
def func(arg):
global func
do_this(arg)
def func(arg):
do_that(arg)
but it's legal and it sometimes can be useful, although it counts as
"clever code", possibly "too clever".
--
Steven
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