Python - OOPS--getter,setter -- Day 26

this explains setter ,getter and decorator

https://www.udemy.com/python-the-complete-python-developer-course/learn/v4/t/lecture/6022196?start=0

  
#getter and setter
#this program explains about the use of get and set methods and property keyword
#this class will be imported in the getsetmain.py,there is no need of importing this class
#but for the clarity and navigation purpose written as 2 programs

#set and get nethods can be used to set as well as check certain conditions
#the return variables and the assignment variable name s/b different ie..level:_lvel and lives:_lives
#if not it will result in error due to recursive

#few simple objectives like lives cannot be less than 0
#and score multiplied by 1000 for each level are achieved
class Player:
    def __init__(self,name):
        self.name = name
        self._lives=3
        self._level = 1
        self._score=0

    def _setlife(self,live):
        if live>=0:
            self._lives = live
        else:
            print('live cannot be negative')
            self._lives=0

    def _getlife(self):
        return self._lives

    def _setlevel(self,level):
        if level>=1:
            delta = level-self._level
            self._score += delta * 1000
            self._level = level
        else:
            print('level cannot be less than 1 ')

    def _getlevel(self):
        return self._level

    lives = property(_getlife,_setlife)
    level = property(_getlevel,_setlevel)

####decorator
#this is similar to the property but with different syntax

#getter
    @property
    def score(self):
        return self._score

#setter
    @score.setter
    def score(self,score):
        self._score = score


    def __str__(self):
        return("{0.name};lives:{0.lives};level:{0.level};score:{0.score}".format(self))
 

main program using the above imported class

  
#we can use getsetplayer.Player, but since it is tedious
#we have used the from and import like below




from getsetplayer import Player

tim = Player('tim')
# print(tim.name)
# print(tim.lives)
# print(tim.score)
# print(tim.level)

print(tim)
tim.lives-=1
print(tim)
tim.lives-=1
print(tim)
tim.lives-=1
print(tim)
tim.lives-=1
print(tim)
tim.lives=3
tim.level+=1
print('*********')
print(tim)
tim.level+=1
print(tim)
print('*********')
tim.score = 500
print(tim)