Algorithm solving problem "136. Single Number" from Leetcode (https:/…

…/leetcode.com/problems/single-number/)

bit_manipulation/single_number.py

@@ -33,3 +33,9 @@ def single_number(nums: list) -> int:
  for el in nums:
  result ^= el
  return result
+
+
+if __name__ == "__main__":
+ import doctest
+
+ doctest.testmod()