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python:python_misc:properties_in_python_classes [2019/02/19 23:12]
mithat
python:python_misc:properties_in_python_classes [2019/06/21 23:16]
mithat
Line 1: Line 1:
 +====== Properties in Python ======
 +
 Good writeups: Good writeups:
   * https://stackabuse.com/the-python-property-decorator/   * https://stackabuse.com/the-python-property-decorator/
Line 6: Line 8:
 class ClickerCounter(): class ClickerCounter():
     def __init__(self, upper):     def __init__(self, upper):
-        self.count = 0       # instance variable for storing the count+        self.__count = 0     # instance variable for storing the count
         self.__limit = upper # instance variable for storing the limit         self.__limit = upper # instance variable for storing the limit
    
Line 13: Line 15:
         Advance the count by one and reset if over the upper limit.         Advance the count by one and reset if over the upper limit.
         """         """
-        self.count = self.count + 1+        self.__count +1
         # wrap the count if over the limit         # wrap the count if over the limit
-        if self.count > self.__limit:   +        if self.__count > self.__limit:   
-            self.count = 0+            self.__count = 0
    
     def reset(self):     def reset(self):
         """Reset the counter."""         """Reset the counter."""
-        self.count = 0+        self.__count = 0 
 +  
 +    @property 
 +    def count(self): 
 +        return self.__count
  
     @property     @property
     def limit(self):     def limit(self):
         return self.__limit         return self.__limit
 + 
     @limit.setter     @limit.setter
     def limit(self, l):     def limit(self, l):
Line 33: Line 39:
         else:         else:
             print('Invalid new limit:', l)             print('Invalid new limit:', l)
 + 
 c = ClickerCounter(100) c = ClickerCounter(100)
 + 
 c.click() c.click()
 c.click() c.click()
-print(c.count) +print(c.count)  # 2 
-print(c.limit) +print(c.limit)  # 100 
 + 
 c.limit = 1000 c.limit = 1000
-print(c.limit) +print(c.limit)  # 1000 
 + 
 c.limit = 0 c.limit = 0
 +print(c.limit)  # 1000
 </code> </code>
python/python_misc/properties_in_python_classes.txt · Last modified: 2019/06/21 23:16 by mithat