Stowage/cpython
2
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-10-31 05:31:20 +00:00
Code Issues Projects Releases Packages Wiki Activity

Make isinstance() more permissive in what types of arguments it

Browse source 
accepts. Clarify exception messages for isinstance() and
issubclass().  Closes bug #124106.
This commit is contained in:
Neil Schemenauer 2000-12-04 15:42:11 +00:00
parent 24342d96c5
commit cc343caf41
1 changed files with 9 additions and 17 deletions
Download patch file Download diff file Expand all files Collapse all files

26
Python/bltinmodule.c
View file

@ -1995,7 +1995,7 @@ Without arguments, equivalent to locals().\n\
With an argument, equivalent to object.__dict__.";
static int
abstract_issubclass(PyObject *derived, PyObject *cls, char *err, int first)
abstract_issubclass(PyObject *derived, PyObject *cls, int first)
{
static PyObject *__bases__ = NULL;
PyObject *bases;
@ -2012,7 +2012,8 @@ abstract_issubclass(PyObject *derived, PyObject *cls, char *err, int first)
bases = PyObject_GetAttr(cls, __bases__);
if (bases == NULL || !PyTuple_Check(bases)) {
Py_XDECREF(bases);
PyErr_SetString(PyExc_TypeError, err);
PyErr_SetString(PyExc_TypeError,
"arg 2 must be a class or type");
return -1;
}
Py_DECREF(bases);
@ -2024,14 +2025,14 @@ abstract_issubclass(PyObject *derived, PyObject *cls, char *err, int first)
bases = PyObject_GetAttr(derived, __bases__);
if (bases == NULL || !PyTuple_Check(bases)) {
Py_XDECREF(bases);
PyErr_SetString(PyExc_TypeError, err);
PyErr_SetString(PyExc_TypeError,
"arg 2 must be a class or type");
return -1;
}
n = PyTuple_GET_SIZE(bases);
for (i = 0; i < n; i++) {
r = abstract_issubclass(PyTuple_GET_ITEM(bases, i),
cls, err, 0);
r = abstract_issubclass(PyTuple_GET_ITEM(bases, i), cls, 0);
if (r != 0)
break;
}
@ -2071,25 +2072,17 @@ builtin_isinstance(PyObject *self, PyObject *args)
}
icls = PyObject_GetAttr(inst, __class__);
if (icls != NULL) {
retval = abstract_issubclass(
icls, cls,
"isinstance() arg 2 must be a class",
1);
retval = abstract_issubclass( icls, cls, 1);
Py_DECREF(icls);
if (retval < 0)
return NULL;
}
else {
PyErr_SetString(PyExc_TypeError,
"isinstance() arg 2 must be a class");
"arg 2 must be a class or type");
return NULL;
}
}
else {
PyErr_SetString(PyExc_TypeError,
"isinstance() arg 2 must be a class");
return NULL;
}
return PyInt_FromLong(retval);
}
@ -2111,8 +2104,7 @@ builtin_issubclass(PyObject *self, PyObject *args)
return NULL;
if (!PyClass_Check(derived) || !PyClass_Check(cls)) {
retval = abstract_issubclass(
derived, cls, "arguments must be classes", 1);
retval = abstract_issubclass(derived, cls, 1);
if (retval < 0)
return NULL;
}