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Why does the @abstractmethod decorator only affects subclasses derived using regular inheritance?
What is a mixin, and why are they useful?Why does comparing strings using either '==' or 'is' sometimes produce a different result?Why java.lang.Object is not abstract?abstract method signature, inheritance, and “Do” naming conventionHow does Python's super() work with multiple inheritance?Creating a singleton in PythonHow to resolve inheritance of abstract base class with multiple derived classesUsing Overloaded Operator from Abstract Class in Derived ClassWhy does @abstractmethod need to be used in a class whose metaclass is derived from ABCMeta?When does Python check whether a concrete subclass of an ABC implements the required methods?
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PEP 3119 -- Introducing Abstract Base Classes states that:
The @abstractmethod only affects subclasses derived using regular inheritance; "virtual subclasses" registered with the register() method are not affected.
I'm wondering why this is the case.
What is the purpose of abc.ABCMeta.register() then?
What is the advantage of registering subclasses rather than subclassing directly via inheritance?
PEP 3119
python python-3.x abstract-class pep abc
asked Mar 27 at 14:03
Simón Ramírez AmayaSimón Ramírez Amaya
1,3092 gold badges8 silver badges21 bronze badges
add a comment |
PEP 3119 -- Introducing Abstract Base Classes states that:
The @abstractmethod only affects subclasses derived using regular inheritance; "virtual subclasses" registered with the register() method are not affected.
I'm wondering why this is the case.
What is the purpose of abc.ABCMeta.register() then?
What is the advantage of registering subclasses rather than subclassing directly via inheritance?
PEP 3119
python python-3.x abstract-class pep abc
asked Mar 27 at 14:03
Simón Ramírez AmayaSimón Ramírez Amaya
1,3092 gold badges8 silver badges21 bronze badges
registerdoesn't require modifying an existing class at all.
– chepner
Mar 27 at 16:50
Could you please elaborate on why is this the case? What purpose doesregister()serve if it doesn't modify existing class?
– Simón Ramírez Amaya
Mar 27 at 19:52
add a comment |
PEP 3119 -- Introducing Abstract Base Classes states that:
The @abstractmethod only affects subclasses derived using regular inheritance; "virtual subclasses" registered with the register() method are not affected.
I'm wondering why this is the case.
What is the purpose of abc.ABCMeta.register() then?
What is the advantage of registering subclasses rather than subclassing directly via inheritance?
PEP 3119
python python-3.x abstract-class pep abc
asked Mar 27 at 14:03
Simón Ramírez AmayaSimón Ramírez Amaya
1,3092 gold badges8 silver badges21 bronze badges
PEP 3119 -- Introducing Abstract Base Classes states that:
The @abstractmethod only affects subclasses derived using regular inheritance; "virtual subclasses" registered with the register() method are not affected.
I'm wondering why this is the case.
What is the purpose of abc.ABCMeta.register() then?
What is the advantage of registering subclasses rather than subclassing directly via inheritance?
PEP 3119
python python-3.x abstract-class pep abc
python python-3.x abstract-class pep abc
asked Mar 27 at 14:03
Simón Ramírez AmayaSimón Ramírez Amaya
1,3092 gold badges8 silver badges21 bronze badges
asked Mar 27 at 14:03
Simón Ramírez AmayaSimón Ramírez Amaya
1,3092 gold badges8 silver badges21 bronze badges
edited Mar 27 at 16:43
Simón Ramírez Amaya
asked Mar 27 at 14:03
Simón Ramírez AmayaSimón Ramírez Amaya
1,3092 gold badges8 silver badges21 bronze badges
asked Mar 27 at 14:03
Simón Ramírez AmayaSimón Ramírez Amaya
1,3092 gold badges8 silver badges21 bronze badges
asked Mar 27 at 14:03
Simón Ramírez AmayaSimón Ramírez Amaya
1,3092 gold badges8 silver badges21 bronze badges
1,3092 gold badges8 silver badges21 bronze badges
registerdoesn't require modifying an existing class at all.
– chepner
Mar 27 at 16:50
Could you please elaborate on why is this the case? What purpose doesregister()serve if it doesn't modify existing class?
– Simón Ramírez Amaya
Mar 27 at 19:52
add a comment |
registerdoesn't require modifying an existing class at all.
– chepner
Mar 27 at 16:50
Could you please elaborate on why is this the case? What purpose doesregister()serve if it doesn't modify existing class?
– Simón Ramírez Amaya
Mar 27 at 19:52
register doesn't require modifying an existing class at all.– chepner
Mar 27 at 16:50
register doesn't require modifying an existing class at all.– chepner
Mar 27 at 16:50
Could you please elaborate on why is this the case? What purpose does
register() serve if it doesn't modify existing class?– Simón Ramírez Amaya
Mar 27 at 19:52
Could you please elaborate on why is this the case? What purpose does
register() serve if it doesn't modify existing class?– Simón Ramírez Amaya
Mar 27 at 19:52
add a comment |
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registerdoesn't require modifying an existing class at all.– chepner
Mar 27 at 16:50
Could you please elaborate on why is this the case? What purpose does
register()serve if it doesn't modify existing class?– Simón Ramírez Amaya
Mar 27 at 19:52