Noob Alert! Wrong result using loop and if statemnent

[bowlofred]

If you modify an object while iterating over it, it can cause problems.

Either iterate over a copy of it, or copy the data you do need and don't copy the rest. Examples:

Iterate over a copy:

nr = 9
my_list = [0,5,6,7,6,9,9,1,9]
 
for i in my_list[:]:
    if i is not nr:
        my_list.remove(i)
print(my_list)

Pull out the data you want, and overwrite the old reference

nr = 9
my_list = [0,5,6,7,6,9,9,1,9]
 
my_list = [x for x in my_list if x == nr]
print(my_list)