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python类的成员变量定义

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class FirstClass:                 # define a class object
     def setdata(self, value):    # define class methods
         self.data = value        # self is the instance
     def display(self):
         print self.data          # self.data: per instance

x = FirstClass()                  # make two instances
y = FirstClass()                  # each is a new namespace

x.setdata('Data')                 # call methods: self is x
y.setdata(3.14159)                # runs: FirstClass.setdata(y, 3.14159)

x.display()                       # self.data differs in each

y.display()

x.data = 'New value'              # can get/set attributes 
x.display()                       # outside the class too

标签:Python,Class

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