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Alex Tirrell
3,359 PointsWhy is my program only detecting six out of the nine experienced players?
The first thing my program does is separate the players into two lists, experienced and not experienced. In order to do so , I use the code:
for player in players: if player['Soccer Experience'] == 'YES': experienced.append(players.pop(players.index(player)))
For some reason, this is only transferring six out of the nine players. Why might that be happening?
2 Answers
Steven Parker
231,236 Points
You should never alter a list that is being iterated, items will be skipped.
Instead, always iterate using a copy of the list you will be altering. You can easily make a copy using a slice with no parameters:
for player in players[:]:
Alex Tirrell
3,359 PointsAlex Tirrell
3,359 PointsOhh, I see! It was moving on to the next index of the list, but because something had just been removed, it was causing it to actually skip the next item! That makes a lot of sense, thank you.