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pythonclassoopinheritance
Bo Peng
Bo Peng

Reputation: 603

Python Inherit Module Class

I have a class with a bunch of generic variables in the init method not specific to the class. I want to make another class that holds these variables and then have the first class inheritance those variables.

So the second class is not a parent class, but more like a module class.

How I write this in python?

Thanks.

Class A():
   def __init__(self):
       self.generic_variable1 = 'blah'
       self.generic_variable2 = 'blah'
       self.generic_variable3 = 'blah'
       self.generic_variable4 = 'blah'
       self.generic_variable5 = 'blah'
       self.generic_variable6 = 'blah'
   
   def generic_method1(self):
       return 'blah'
   
   def class_specific_method1(self):
       pass

After creating two classes:

Class A():
   def __init__(self):
       pass
   
   def class_specific_method1(self):
       pass

Class B():
   def __init__(self):
       self.generic_variable1 = 'blah'
       self.generic_variable2 = 'blah'
       self.generic_variable3 = 'blah'
       self.generic_variable4 = 'blah'
       self.generic_variable5 = 'blah'
       self.generic_variable6 = 'blah'
   
   def generic_method1(self):
       return 'blah'

Upvotes: 0

Views: 51

Answers (2)

wwii
wwii

Reputation: 23753

A module level dictionary that the class can access.

d = {'k':'v','q':'r','m':'n',...}

class F:
    variables = d
    def __init__(self,...)

Or maybe a collections.namedtuple instead of a dictionary to give you dot access - instance.variables.attr instead of instance.variables[attr]` .

If you want individual attributes:

d = {'k':'v','q':'r','m':'n'}

class F:
    def __init__(self):
        for attr,val in d.items():
            setattr(self,attr,val)

Or set the attributes outside of the class

d = {'k':'v','q':'r','m':'n'}

class F:
    def __init__(self):
        pass

for k,v in d.items():
    setattr(F,k,v)

Upvotes: 1

Limina102
Limina102

Reputation: 1087

Just simply

class A:
    ... ...
    
class B(A):
    ... ...

In class B, if you do not rewrite __init__, it will automatically use class A's.

If you need do extra thing in class B's __init__:

class B(A):
    def __init__(self, *args, **kw):
        super().__init__(*args, **kw)
        ... ...

Upvotes: 1

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