[Python-Dev] Proper way to specify that a method is not defined for a type
ethan at stoneleaf.us
Tue Jun 7 13:37:58 EDT 2016
For binary methods, such as __add__, either do not implement or return
NotImplemented if the other operand/class is not supported.
For non-binary methods, simply do not define.
Except for subclasses when the super-class defines __hash__ and the
subclass is not hashable -- then set __hash__ to None.
Are there any other methods that should be set to None to tell the
run-time that the method is not supported? Or is this a general
mechanism for subclasses to declare any method is unsupported?
More information about the Python-Dev