Can we use str.isdigit() and str.isalpha() without importing any library or modules?

Question

input_1 = input()
calc = input_1.split()
print(calc[0])
calc[0].isdigit()

This prints only the value of calc[0]. Not printing True or False.

Why is this code not returning whether calc[0] is a digit or not?

Answer 1

It works without importing anything, it needs just a print statement:

calc = input().split()
print(calc[0])
print(calc[0].isdigit())