7 kyu Form The Minimum

7 kyu Form The Minimum
https://www.codewars.com/kata/5ac6932b2f317b96980000ca/train/python
Task
Given a list of digits, return the smallest number that could be formed from these digits, using the digits only once (ignore duplicates). Only positive integers in the range of 1 to 9 will be passed to the function.

Verbalization

Exclude duplicated digits = select digits only once (use set())
Sort digits from small (use sorted())
join digits (append and join() be careful that join() can be used only for string)

Code

def min_value(digits):
    s = set(digits)
    d = sorted(s)
    n = []
    for i in d:
        n.append(str(i))
    return int("".join(n))