List comprehension rebinds names even after scope of comprehension. Is this right?

Question

Comprehensions are having some unexpected interactions with scoping. Is this the expected behavior?

I\'ve got a method:

def leave_room(self, uid):
           


        

Answer 1

Yes, assignment occurs there, just like it would in a for loop. No new scope is being created.

This is definitely the expected behavior: on each cycle, the value is bound to the name you specify. For instance,

>>> x=0
>>> a=[1,54,4,2,32,234,5234,]
>>> [x for x in a if x>32]
[54, 234, 5234]
>>> x
5234

Once that's recognized, it seems easy enough to avoid: don't use existing names for the variables within comprehensions.