> the block defined by the "on" statement first must starts looking at
> the object's namespace. If no symbol was defined inside a, then it
> follows the traditional LEGB name resolution.
>
> Assignament must work on the object's namespace, of course:
This probably belongs to python-ideas or some such, but I don't
think this approach can work. People will want to assign to local
variables in an "ob" block, and then be surprised that the
assignment actually modified their object:
def f(L):
total = 0
for h in L:
on h:
more code accessing h's attributes
if x: # reads h.x
total = total+1
return total
People will be surprised that total is always 0 (and that
some objects have an attribute total with a value of 1).
Likewise
on x:
for e in L:
counts[e] += 1 # modifies x.counts
People will be surprised that x also grows an attribute
e, as the for loop involves an assignment, which you say
goes to the object's namespace, of course.
Regards,
Martin
_______________________________________________
Python-Dev mailing list
[email protected]
http://mail.python.org/mailman/listinfo/python-dev
Unsubscribe:
http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
