问题
Learn to Program: Crafting Quality Code
Screenshot
This is a video lecture from Coursera Learn to Program Crafting Quality Code Course.
So there is a quiz during the video.
class MyInt(int):
# some code there
They gave 4 answers where I need to choose a right one. I've choose my answers one by one but finally they say that right is absolutely wrong answer.
int is a subclass of MyInt
This question Python: How do I make a subclass from a superclass? gives me absolutely right confirmation that I'am right.
Where is the truth?
回答1:
There must be something wrong with the quiz, the code as written in the question is declaring that MyInt is a subclass of int (or equivalently: that int is the superclass of MyInt), no the other way around.
回答2:
If you inherit from a class, that class is the super-class. In the example int is the super (or base) class and MyInt is the subclass. They're wrong, just as you suspected. ;-)
来源：https://stackoverflow.com/questions/15954360/superclass-inherits-from-a-subclass-coursera-are-they-crazy