Delete strings from a list to create a new only number list

[DeaD_EyE]

Same as a list-comprehension:

mixed_types = ['Bla', 'Blu', 10, 20, 30, 40]

numbers = [element for element in mixed_types if isinstance(element, int)]

Or with filter:

def isint(x):
    return isinstance(x, int)


mixed_types = ['Bla', 'Blu', 10, 20, 30, 40]
numbers = list(filter(isint, mixed_types))