How to type negative number with .isdigit?

Question

when I try this

if question.isdigit() is True:

I can type in numbers fine, and this would filter out alpha/alphanumeric strings

whe

Answer 1

I have just had a similar question on edabit where I realised that negative numbers returned as False whilst using isnumeric(). I have put my solution below: Create a function that takes a list of strings and integers, and filters out the list so that it returns a list of integers only.

def filter_list(list):
    numbers = [i for i in list if str(i).isnumeric() == True]
    for i in list:
        try:
            int(i)
            if i <0:
                numbers.append(i)
        except ValueError:
            continue
    return numbers
list = [1,2,3,'a','b','c', -6, 0]
print(filter_list(list))

I am still new to Python so this is a basic attempt. Feel free to let me know if there is a much easier or better looking way.