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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
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