Python3: Form The Minimum

Introduction

Kata – http://www.codewars.com/kata/form-the-minimum/python

Given a list of digits, return the smallest number that could be formed from these digits, using the digits only once (= ignore duplicates).

Note: Only positive integers will be passed to the function (> 0 ), no negatives or zeros.

Examples

[1, 3, 1] ==> 13
[5, 7, 5, 9, 7] ==> 579
[1, 9, 3, 1, 7, 4, 6, 6, 7] ==> 134679

My Code

def min_value(digits):
 return int("".join([str(x) for x in sorted(set(digits))]))
print(min_value([4, 8, 1, 4]))