Consider the following code which would set the hour of a Time object to an invalid value. wake_up._hour = 100
Which of the following statements is false?
A) Rather than _hour, we can name the attribute __hour with two leading underscores. This convention indicates that __hour is "private" and should not be accessible to the class's xe "client of a class"clients.
B) To help prevent clients from accessing "private" attributes, Python renames them by preceding the attribute name with _ClassName, as in _Time__hour. This is called xe "name mangling"name mangling.
C) If you try to assign to __hour, as in
Wake_up.__hour = 100
Python raises a ValueError, indicating that the class does not have an __hour attribute.
D) IPython does not show attributes with one or two leading underscores when you try to auto-complete an expression like
Wake_up.
By pressing Tab. Only attributes that are part of the wake_up object's "public" interface are displayed in the IPython auto-completion list.

Question

Quizplus · Accepted Answer

Option C is false because Python does not raise a ValueError when assigning to a "private" attribute with two leading underscores. Instead, it performs name mangling and creates a new attribute with a different name. The correct way to access this attribute is to use the mangled name, as in wake_up._Time__hour = 100. Option A, B, and D are all true statements.

Consider the Following Code Which Would Set the Hour of a Time