Would anyone know the code in python that prints ONLY if it's a binary string? Thanks in advance

The real problem is there:
write a program that takes a string as input and prints “Binary Number” if the string contains only 0s or 1s. Otherwise, print “Not a Binary Number”.

>Solution :

You can iterate every character of the input and verify it is a zero or a one. The all function can be used for this iteration and check.

Also require that the string has at least one character:

def isBinary(string):
    return all(ch in "01" for ch in string) and string != ''

Example use:

string = input("Enter a binary number: ")
if isBinary(string):
    print("Thank you!")
else:
    print("That is not a binary number.")