Write a Python function to check if a string is binary or not

Solution

def check2(string) : 
    t = '01'
    count = 0
    for char in string : 
        if char not in t : 
            count = 1
            break
        else : 
            pass
    if count : 
        print("No, string is not binary") 
    else : 
        print("Yes, string is binary") 
string = "001021010001010"
check2(string)