Delete negative values from a list

Write a Python function delete_negatives that takes a list as an argument and returns the same list but without the negative elements.

>>> delete_negatives([0,-1,-11,2,33,-100,5])
    [2, 33, 5]
>>> delete_negatives([-1,-11,-3])
    []
>>> delete_negatives([4,68,111])
    [4, 68, 111]

Run more automated tests with pytest. Don’t forget a test for the empty list and the list with 1 element.