Question

I am trying to generate random number in python using random.sample . This is how I am writing code .

import random
r = "".join(random.sample("abcdefghijklmnopqrstuvwxyz", 10))

Above code generates random numbers of length 10 whose letters are populated from the letters a-z. How can i use regular expressions over there like [a-z]?

Answer 1

Just use this instead

>>> from string import ascii_lowercase, ascii_uppercase
>>> ascii_lowercase
'abcdefghijklmnopqrstuvwxyz'
>>> ascii_uppercase
'ABCDEFGHIJKLMNOPQRSTUVWXYZ'

If you want to generate digits you can use range

>>> map(str, range(10))
['0', '1', '2', '3', '4', '5', '6', '7', '8', '9']