import random
numbers = random.sample(range(10), 4)
print(''.join(map(str, numbers)))

This works almost fine but the number starts with 0 sometimes. I found a lot of examples but none of them guarantee not starting with 0. Thanks for your help!

This works almost fine but the number starts with 0 sometimes:

import random
numbers = random.sample(range(10), 4)
print(''.join(map(str, numbers)))

I've found a lot of examples but none of them guarantee that the sequence won't start with 0.