二进制转换到蟒蛇

如何二进制转换为整数在蟒蛇

def binary2int(binary): 
    int_val, i, n = 0, 0, 0
    while(binary != 0): 
        a = binary % 10
        int_val = int_val + a * pow(2, i) 
        binary = binary//10
        i += 1
    print(int_val) 
    

binary2int(101)