Updating the underscore in Python names article

Author: lpozo

python-double-underscore/csv_data.py

@@ -1,5 +1,3 @@
-# csv_data.py
-
 import csv
 
 

python-double-underscore/mangling.py

@@ -0,0 +1,15 @@
+class A:
+    def __init__(self):
+        self.__attr = 0
+
+    def __method(self):
+        print("A.__attr = ", self.__attr)
+
+
+class B(A):
+    def __init__(self):
+        super().__init__()
+        self.__attr = 1  # Doesn't override A.__attr
+
+    def __method(self):  # Doesn't override A.__method()
+        print("B.__attr = ", self.__attr)