Python in a Nutshell

Name

PyErr_Format

Synopsis

PyObject* PyErr_Format(PyObject* type,char* format,...)

Raises an exception of class type, a built-in such as PyExc_IndexError, or an exception class created with PyErr_NewException. Builds the associated value from format string format, which has syntax similar to printf’s, and the following C values indicated as variable arguments above. Returns NULL, so your code can just call:

return PyErr_Format(PyExc_KeyError, 
    "Unknown key name (%s)", thekeystring);