Weird Behaviour When Iterating Through List And Deleting Elements In Python

I'm trying to iterate over a Python list and delete each element once I've done some tasks with it, but it jumps one element after each iteration and I don't know why: >>>

Solution 1:

Well, your list is shrinking while you are iterating over it. If you want to, just look at the first element while your iterate over it.

whilelen(simple_list) > 0:
    print(simple_list[0])
    del simple_list[0]

Solution 2:

You can use list comprehension to get copy of the array and then iterate.

simple_list = list(range(10))
for i in simple_list[:]:
    print(i)
    simple_list.remove(i)

Solution 3:

Or this:

for i in simple_list[:]:
   simple_list.remove(i)
print(simple_list)

Output:

[]

Solution 4:

Ok, found the answer here: Python: Removing list element while iterating over list

You should NEVER delete an element from a list while iterating over it in a for loop. You could use a while loop instead. Or, record the indices of all the elements you want to remove and then delete them after the iteration is complete