python类的成员变量定义，python成员变量,class FirstC

python类的成员变量定义，python成员变量,class FirstC

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 instancex = FirstClass()                  # make two instancesy = FirstClass()                  # each is a new namespacex.setdata('Data')                 # call methods: self is xy.setdata(3.14159)                # runs: FirstClass.setdata(y, 3.14159)x.display()                       # self.data differs in eachy.display()x.data = 'New value'              # can get/set attributes x.display()                       # outside the class too