I currently use:

for i in range(1,10):print i

Which prints the digits 1 to 9. But I want to add a-z to the mix. How can I combine them?

Rather than create a range, loop over a string, to get individual characters:

import stringfor character in string.ascii_lowercase + string.digits[1:]:print character

This uses the string module to grab pre-defined strings of ASCII lowercase letters and digits.

The string.digits[1:] slice removes the '0' character to leave just the digits '1' through to '9'.