Sublassing in C

[Dennis Kaarsemaker]

I'm trying to create a subclass of Exception in C, but cant figure out
what to use as tp_base in the PyTypeObject struct. Can anybody give me
directions on where to look or maybe even an answer?

 

[David M. Cooke]

I'm trying to create a subclass of Exception in C, but cant figure out
what to use as tp_base in the PyTypeObject struct. Can anybody give me
directions on where to look or maybe even an answer?

Have a look at Python/exceptions.c in the Python source; that's where
all the subclasses of Exception (IndexError, etc.) are created.

 

[Greg Chapman]

I'm trying to create a subclass of Exception in C, but cant figure out
what to use as tp_base in the PyTypeObject struct. Can anybody give me
directions on where to look or maybe even an answer?

Currently, exceptions have to be old-style classes, so you cannot create a
subclass using the new type-based subclassing. Instead, you should use
PyErr_NewException, which creates a new Exception subclass with the given name,
base and attributes (despite the first sentence of the documentation, it returns
a new subclass, not a new exception object).