Floats not evaluating as negative (Python)

Question

I am trying to delete floating point values in a list that are negative. The original list with all of the values looks like this:

[
    0.030079979253112028         


        

Answer 1

You are iterating over and mutating the list which means you end up removing the wrong elements, you can use reversed:

for num in reversed(lst):
    if num < 0:
        lst.remove(num)

Or make a copy:

for num in lst[:]:
    if num < 0:
        lst.remove(num)

You can also use a list comp to modify the original list:

lst[:] = [num for num in lst if num >= 0]