How to check if all the digits of a number are odd in python?

Question

I was told to solve a problem in which I would have to find out the number of 4-digit numbers which are all composed of odd digits. I tried the following python code:

Answer 1

for i in range(1000,3001):
  s=str(i)
  if (int(s[0])%2==0 and int(s[1])%2==0 and int(s[2])%2==0 and int(s[3])%2==0):
      print(i,end=",")