OOP finished

OOP/MRO.py

@@ -0,0 +1,32 @@
+#MRO - Method Resolution order
+
+class A:
+    num = 10
+
+class B(A):
+    pass
+
+class C(A):
+    num = 1
+
+class D(B,C):
+    pass
+
+print(D.mro())
+
+# [<class '__main__.D'>, 
+#  <class '__main__.B'>, 
+#  <class '__main__.C'>, 
+#  <class '__main__.A'>, 
+#  <class 'object'>]
+
+# The order of this determined using DFS.
+
+#     A
+#    / \
+#   /   \
+#  B     C
+#   \   /
+#    \ /
+#     D
+