Property Method in Python

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This program defines a Python class "student" with the following attributes and methods:

• __init__ method: This method is called when an object of the class is created. It initializes the _total attribute with the passed value.
• average method: This method calculates the average of the _total attribute and returns the result.
• getter method: This method returns the value of the _total attribute.
• setter method: This method sets the value of the _total attribute to the passed value. However, it checks if the passed value is less than 0 or greater than 500. If so, it prints "Invalid Total and can't Change."
• total property: This property is created using the property method and links the getter and setter methods with the _total attribute.

The program then creates an object o of the "student" class and passes 450 as the argument for total. It then prints the total attribute and the result of the average method.

Finally, it sets the value of total to 350, which is considered valid, hence it is set to the new value. The updated values of the total attribute and the result of the average method are then printed.

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Source Code

# Property Method
 
class student:
    def __init__(self, total):
        self._total = total
 
    def average(self):
        return self._total / 5.0
 
    def getter(self):
        return self._total
 
    def setter(self, t):
        if t < 0 or t > 500:
            print("Invalid Total and can't Change")
        else:
            self._total = t
 
    total = property(getter, setter)
 
 
o = student(450)
print("Total   : ", o.total)
print("Average : ", o.average())
o.total = 350
print("Total   : ", o.total)
print("Average : ", o.average())
 

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Output

Total   :  450
Average :  90.0
Total   :  350
Average :  70.0

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