Unexpected IndexError while removing list items [duplicate]

Answer 1

As you removing items from the list, range(len(test)) still holds the same value. So even if your test list has only no items left, the loop is still going.

I have two solutions:

1. Copy the items you want to a new list, so instead of deleting it:

   test2 = test[i]
   

   And don't forget to reverse the conditions.

2. Loop it backwards. Like this:

   n = len(test)
   for i in range(n):
       j = n - i - 1
       if j > 1:
       if test[j][0:2] == test[j-1][0:2]:
           test.remove(test[j])
   

   Or, as martijn suggested:

   n = len(test)
   for i in range(n-1, 0, -1):
       if i > 1:
       if test[i][0:2] == test[i-1][0:2]:
           test.remove(test[i])
   

Hope it helps!

P.S sorry for my stupid, previous answer