numbers.py

import sys

def int_succeeds(c: str):
    try:
        int(c)
    except ValueError:
        return False
    return True

chars = [chr(n) for n in range(sys.maxunicode + 1)]
numerics = {c for c in chars if c.isnumeric()}
digits = {c for c in chars if c.isdigit()}
decimals = {c for c in chars if c.isdecimal()}
print('No. numerics:', len(numerics))
print('No. digits:', len(digits))
print('No. decimals:', len(decimals))
print('numerics \N{SUPERSET OF} digits \N{SUPERSET OF} decimals:', numerics > digits > decimals)
print('int() on all numerics:', all(int_succeeds(c) for c in numerics))
print('int() on all digits:', all(int_succeeds(c) for c in digits))
print('int() on all decimals:', all(int_succeeds(c) for c in decimals))