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Adiv Abramson
6,919 PointsCan an instance variable, e.g. self.xxx have the same name as a class variable? If so, is this a good practice?
Would the following code be OK?
class Widget():
weight = 10
length = 5
thickness = 2
widget_count = 0
def __init__(self, the_weight, the_length, the_thickness):
#do these assignments affect the class variables, which have
#the same name?
self.weight = the_weight
self.length = the_length
self.thickness = the_thickness
If an object is created from this class, do the properties refer to the class variables or the instance variables, e.g.:
my_widget = Widget(30, 110, 6)
my_widget.weight = #10 or 30? my_widget.length = # 5 or 110? my_widget.thickness = #2 or 6?
I know that Widget.widget_count returns 1 but is there a way to get to this class variable from within the object instance, e.g
my_widget.Parent.widget_count ?
Thank you
1 Answer
Kenneth Love
Treehouse Guest TeacherAnything assigned explicitly to self will always refer to an instance, not the class.
To get back to the class, use self.__class__ or <instance>.__class__ where <instance> is an instance... yeah.