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Added a warning when -3 is enabled and None is passed to filter as the first argument.

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David Wolever 2008-03-18 21:20:25 +00:00
parent 30f3680db7
commit 8e6ec2ff02
1 changed files with 7 additions and 0 deletions
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7
Python/bltinmodule.c
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@ -296,6 +296,13 @@ builtin_filter(PyObject *self, PyObject *args)
} }
if (func == (PyObject *)&PyBool_Type || func == Py_None) { if (func == (PyObject *)&PyBool_Type || func == Py_None) {
if (Py_Py3kWarningFlag &&
PyErr_Warn(PyExc_DeprecationWarning,
"filter with None as a first argument "
"is not supported in 3.x. Use a list "
"comprehension instead.") < 0)
return NULL;
ok = PyObject_IsTrue(item); ok = PyObject_IsTrue(item);
} }
else { else {