+ +

Given a 2D array.

+ +
matrix = [
+    [1,2,3],
+    [4,5,6],
+    [7,8,9]
+]
+
+And you want result:
+
+```python
+[
+    [1,4,7],
+    [2,5,8],
+    [3,6,9]
+]
+
+ +

Do this:

+ +
result = zip(*matrix)
+
+ +

Explanation:

+ +
x = ['a', 'b', 'c']
+y = 1, 2, 3]
+list(zip(x, y))
+# [
+#     ('a', 1), 
+#     ('b', 2), 
+#     ('c', 3)
+# ]
+
+ + +