@property use

1 Introduction

Convert class method as a class attribute, you can use direct acquisition of property or property value assignment
Python's built @property decorator is responsible for the property to become a method call

2. Implement

class student(object):
    @property
    def score(self):
        return self._score
    @score.setter
    def score(self,value):
        if not isinstance(value, int):
            raise ValueError('score must be an integer!')
        if value < 0 or value > 100:
            raise ValueError('score must between 0 ~ 100!')
        self._score = value
stu=student()
stu.score=99
print(stu.score)

3. Summary

score increased (on) Method @property decorator is equivalent to score = property (fget = score), the score assigned to the property instance.

So, after the score was decorated, this is not an instance method score, but examples of the score property.

@property widely used in the definition of class, allowing the caller to write a short code, while ensuring the necessary checks on the parameters, so that the program is running it reduces the possibility of error.