ch06

ch06/oop/class.namespaces.py

@@ -0,0 +1,40 @@
+# oop/class.namespaces.py
+class Person:
+    species = 'Human'
+
+
+print(Person.species)  # Human
+Person.alive = True  # Added dynamically!
+print(Person.alive)  # True
+
+man = Person()
+print(man.species)  # Human (inherited)
+print(man.alive)  # True (inherited)
+
+Person.alive = False
+print(man.alive)  # False (inherited)
+
+man.name = 'Darth'
+man.surname = 'Vader'
+print(man.name, man.surname)  # Darth Vader
+
+print(Person.name)
+# This doesn't work. We try to access an instance attribute
+# from a class. Doing the opposite works, but this will give
+# the following error:
+# AttributeError: type object 'Person' has no attribute 'name'
+
+
+"""
+$ python class.namespaces.py
+Human
+True
+Human
+True
+False
+Darth Vader
+Traceback (most recent call last):
+  File "/Users/fab/srv/lpp3e/v3/ch06/oop/class.namespaces.py", line 21, in <module>
+    print(Person.name)
+AttributeError: type object 'Person' has no attribute 'name'
+"""