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and just to keep things organized at the
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top of my file let's define a third
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class called Wizard and a wizard will
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have its own initialization method so
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decore uncore init underscore uncore and
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self as always and a wizard let's say
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for now is only going to be initialized
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with their name in this way and now I'm
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going to go ahead and do some of that
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error checking so if not name we'll
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raise a value error in the Wizard class
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otherwise we'll go ahead and do self.
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name equals name and heck dot dot dot
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maybe some other functionality as well
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but not a subject which is specific to
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professors and not a house which I've
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claimed is specific to students now I
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think we can begin to maybe remove some
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of the redundancies in our other classes
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here so for instance down with student
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why don't I go ahead and remove this
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error checking here and remove this
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error this assignment of self. name
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equals name because I'm already doing
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that in Wizard and similarly down here
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in Professor why don't I do the same
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let's get rid of the error checking
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let's get rid of self. name equals name
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because I'm again I'm doing that already
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up there for Wizard as well but at the
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moment even though they're all in the
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same file I haven't told python that a
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student is a wizard and a professor is a
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wizard so I really need to link these
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two together and the way you can
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prescribe inheritance whereby one class
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should inherit from another or
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conversely one class should descend for
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another from another we can do this I
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can say class student but before the
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colon I can go in and say in parenthesis
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a student inherits from or is a subclass
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of wizard which conversely is the super
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class of the student class so this means
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that when I Define a student class go
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ahead and inherit all of the
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characteristics of a wizard as well and
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I'm going to do the same thing for her
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for Professor so parenthesis wizard
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after the class name professor and
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that's going to give me access to some
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of that same
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functionality but because my student
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class and my professor class still have
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their same init methods those are the
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methods that are going to get called
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whenever I create a student in code or I
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create a professor in code I need to
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somehow explicitly say that I also want
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to use the functionality in the Wizard
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classes init method and the way to do
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this in Python is is as follows let me
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go into my init method for student and
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let me call Super with no arguments
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which is a reference to the super class
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of this class so if this class is
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student the super class that is the
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parent class is Wizard so super open
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paren Clos paren will have the effect of
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accessing the super class and then I'm
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going to go ahead and explicitly call
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its in it method and I'm going to pass
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to the Wizards init method the name that
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the students init method was passed and
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I'm going to go ahead and do the same
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down here in Wizard this is one line of
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copy paste but I think I'm okay with it
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here because it's still allowing me to
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do all of the name assignment and the
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error checking up in the Wizard class
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instead I think we're okay now by just
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calling super. init for both student and
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Professor alike now admittedly this
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syntax is definitely out there the fact
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that we're calling super and parentheses
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and dots and underscore underscore on
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the left and the right of init here but
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it's just a combination of these two
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ideas super open parenthesis closed
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parenthesis is a way of programmatically
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accessing a current class's parent class
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or super class and underscore uncore in
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it of course is just referring to now
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that class's own initialization method
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now per the dot dot dots there could be
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a lot more going on in these classes but
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what's nice now is that wizard as a
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class is taking care of all of the
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assignments of a Wizard's name whether
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that wizard is a student or a professor
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