taking user input without the input() function

import sys

# underscore added to not be confused with the builtin input function
def _input(prompt=None, /):
    if prompt:
        print(prompt, end="", flush=True)
    line = sys.stdin.readline()
    if not line:
        raise EOFError
    if line[-1] == '\n':
        line = line[:-1]
    return line