Update solution 046 [Python3]

Author: chakyam

solution/046.Permutations/Solution.py

@@ -0,0 +1,15 @@
+class Solution:
+    def permute(self, nums):
+        """
+        :type nums: List[int]
+        :rtype: List[List[int]]
+        """
+        if len(nums) <= 1: 
+            return [nums]
+        ans = []
+        for i, num in enumerate(nums):
+            n = nums[:i] + nums[i+1:]
+            for y in self.permute(n):
+                ans.append([num] + y)
+        return ans
+