Issue #9165: Add math.isfinite and cmath.isfinite.
diff --git a/Modules/cmathmodule.c b/Modules/cmathmodule.c
index 2af2e53..986b241 100644
--- a/Modules/cmathmodule.c
+++ b/Modules/cmathmodule.c
@@ -1024,6 +1024,19 @@
Convert from polar coordinates to rectangular coordinates.");
static PyObject *
+cmath_isfinite(PyObject *self, PyObject *args)
+{
+ Py_complex z;
+ if (!PyArg_ParseTuple(args, "D:isfinite", &z))
+ return NULL;
+ return PyBool_FromLong(Py_IS_FINITE(z.real) && Py_IS_FINITE(z.imag));
+}
+
+PyDoc_STRVAR(cmath_isfinite_doc,
+"isfinite(z) -> bool\n\
+Return True if both the real and imaginary parts of z are finite, else False.");
+
+static PyObject *
cmath_isnan(PyObject *self, PyObject *args)
{
Py_complex z;
@@ -1065,6 +1078,7 @@
{"cos", cmath_cos, METH_VARARGS, c_cos_doc},
{"cosh", cmath_cosh, METH_VARARGS, c_cosh_doc},
{"exp", cmath_exp, METH_VARARGS, c_exp_doc},
+ {"isfinite", cmath_isfinite, METH_VARARGS, cmath_isfinite_doc},
{"isinf", cmath_isinf, METH_VARARGS, cmath_isinf_doc},
{"isnan", cmath_isnan, METH_VARARGS, cmath_isnan_doc},
{"log", cmath_log, METH_VARARGS, cmath_log_doc},