I have a parent class and several subclasses. Every subclass accepts different parameters, but all subclasses have some common parameters. I don't want to write the "common parameters" for every subclass. How can I do this?
class Parent:
def __init__(self, name):
self.name = name
class Subclass(Parent):
def __init__(self, age):
self.age = age
def do_something(self):
print(self.name)
instance = Subclass(name="Test", age=42)
instance.do_something() # 42
You can try this:
class Subclass(Parent):
def __init__(self, **kwargs):
super().__init__(kwargs['name'])
self.age = kwargs['age']
def do_something(self):
print(self.name)
And then use this just like you did in the question:
instance = Subclass(name="Test", age=42)
I use it in the following manner
You can add as many child classes as you want
class ParentClass(object):
def __init__(self,baseArgs):
self.var1=baseArgs['var1']
self.var2=baseArgs['var2']
self.var3=baseArgs['var3']
class ChildClass(ParentClass):
def __init__(self,childArgs,baseArgs):
super(ChildClass, self).__init__(baseArgs)
self.cvar1=childArgs['cvar1']
self.cvar2=childArgs['cvar2']
a=ChildClass({'cvar1':40,'cvar2':50},{'var1':10,'var2':20,'var3':30})
print(a.var1)
# 10
__init__you have to dosuper().__init__(name). If you're using multiple inheritance, it gets more complicated, and you should look into the Python MRO first.