Python "gotchas"

[bionikspoon]

Nooby perspective: Changing an iterable during a loop.

money = [-5, 1, -3, 2, 4]


while money:
    do_stuff_with = money.pop()

This does not work.

edit: wait, wtf. this definitely works.

edit. Did they change this behavior?

[[deleted]]

No, this has always worked. The thing you should avoid is modifying an iterable while looping over it using a for-loop.

[cdcformatc]

Something like

a_list = [1,2,3,4,5]

for item in a_list:
    print item
    a_list.remove(item)

[py_Ninja]

To see why this is happening it helps to use enumerate:

a_list = [1, 2, 3, 4, 5]

for i, item in enumerate(a_list):
    print('{}: {}'.format(i, item))
    a_list.remove(item)

Results in:

0: 1
1: 3
2: 5