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Support type objects in isinstance(). 

E.g. isinstance('',types.StringType) will return true now instead of
raising a TypeError exception.  This is for JPython compatibility.
This commit is contained in:
Guido van Rossum 1997-12-02 19:11:45 +00:00
parent 6cedf82ac1
commit f5dd914196
1 changed files with 15 additions and 10 deletions
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25
Python/bltinmodule.c
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@ -1627,18 +1627,23 @@ builtin_isinstance(self, args)
if (!PyArg_ParseTuple(args, "OO", &inst, &cls))
return NULL;
if (!PyClass_Check(cls)) {
PyErr_SetString(PyExc_TypeError,
"second argument must be a class");
return NULL;
if (PyType_Check(cls)) {
retval = (inst->ob_type == cls);
}
if (!PyInstance_Check(inst))
retval = 0;
else {
PyObject *inclass =
(PyObject*)((PyInstanceObject*)inst)->in_class;
retval = PyClass_IsSubclass(inclass, cls);
if (!PyClass_Check(cls)) {
PyErr_SetString(PyExc_TypeError,
"second argument must be a class");
return NULL;
}
if (!PyInstance_Check(inst))
retval = 0;
else {
PyObject *inclass =
(PyObject*)((PyInstanceObject*)inst)->in_class;
retval = PyClass_IsSubclass(inclass, cls);
}
}
return PyInt_FromLong(retval);
}