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POUsing __init__ and inheritance in python
 

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  1. POUsing __init__ and inheritance in python
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    <p>I'm a little confused regarding using <code>__init__</code> and inheritance and would love to get some help with it.</p> <p>I have a class [that can not be changed]:</p> <pre><code>class A(object): def __init__(self, param1 = 7, param2 = 10): self.x = param1 self.y = param2 def func1(self): op1() op2() def func2(self): pass </code></pre> <p>this is some class that was written and I'm using it when overloading its functions:</p> <pre><code>class B(A): def func1(self) op3() op4() def func2(self) op5() </code></pre> <p>My problem starts here : I want to use Class B several times and sent each time different parameter:</p> <pre><code>---new .py file: --- def myFunction(): myInstance = B() </code></pre> <p>I want to do something like :</p> <pre><code>def myFunction(): myInstance = B(40,"test") </code></pre> <p>I thought adding to B class - <code>__init__</code> but the problem is that now I'm not sure what <code>self</code> it would use : explanation : Inside B class I have overloaded <code>func2(self)</code> I thought writing :</p> <pre><code>class B(A): def __init__(self, paramNumber, paramString) self.paramNumber = paramNumber self.paramString = paramString </code></pre> <p>but now in <code>func2(self)</code> , what <code>self</code> is used? the new one? the old one? will it work? meaning I will have : <code>self.x , self.y and self.paramNumber self.parmString ?</code>they are different "selfs"</p> <p>Editing : Should I use super as well?</p> <pre><code> class B(A): def __init__(self, paramNumber, paramString,param1, param2) self.paramNumber = paramNumber self.paramString = paramString super(B,self).__init__(param1,param2) def myFunction(): myInstance = B(40,"test") // I will get : self.x = 7 // self.y= 10 // self.paramNumber=40 //self.paramString = "test" </code></pre> <p>is this the correct solution?</p>
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    1. COThey're the same `self`, but you've forgotten to call `A.__init__` to set up `.x` and `.y`
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      1. USEric
    2. CODon't call `A.__init__` directly as Eric mentions. Use [super](http://docs.python.org/2/library/functions.html#super).
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    3. COso wait - I need to add to my "def __init__(self,paramNumber, paramString) after setting this init, also the super??
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