Question

So I’m iterating over items in a list in this way:

for virus in viruses:
    do stuff
    remove virus

If I had the index, I could just do del virus[i], and I could obviously tweak the code to do something like for index in range(0, len(viruses)), but that starts to make the code ugly pretty quickly for the other things I want to do within the for loop. Is there anyway I can just remove based on the name of the virus I am currently iterating over?

Answer 1

How about this:

for virus in viruses[:]:
    # do stuff
    viruses.remove(virus)  # remove "virus" from the original list

viruses[:] creates a copy of our viruses list. As a note, you can also use list(oldlist) to copy lists (I find this a little more readable, but either will work). You can read more about lists in python here.