The property() built-in function can take up to four arguments. : method « Class « Python Tutorial

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Python Tutorial » Class » method   11. 4. 6. The property() built-in function can take up to four arguments. # Its signature is: property(fget=None, fset=None, fdel=None, doc=None) class MyClass(object):     def __init__(self, x):         assert isinstance(x, int), '"x" must be an integer!'         self.__x = ~x     def get_x(self):         return ~self.__x     x = property(get_x) inst = MyClass('foo') inst = MyClass(10) print 'inst.x =', inst.x inst.x = 20 11. 4. method 11. 4. 1.  Methods in class 11. 4. 2.  Intermediate Customization 11. 4. 3.  Any Number of Items Iterator 11. 4. 4.  __str__, __add__, __mul__,__nonzero__,__norm_cval,__cmp__ 11. 4. 5.  Wrapping Standard Types 11. 4. 6.  The property() built-in function can take up to four arguments. 11. 4. 7.  A setter 11. 4. 8.  stick in a documentation string for your attribute 11. 4. 9.  Here is our modified class inspired by the recipe: 11. 4. 10.  Class Time with accessor methods. 11. 4. 11.  Methods calling 11. 4. 12.  Add method to a class from outside

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