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-rw-r--r--Modules/mathmodule.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/Modules/mathmodule.c b/Modules/mathmodule.c
index 5087ecc..01d3991 100644
--- a/Modules/mathmodule.c
+++ b/Modules/mathmodule.c
@@ -630,7 +630,10 @@ error:
return NULL;
}
-PyDoc_STRVAR(math_factorial_doc, "Return n!");
+PyDoc_STRVAR(math_factorial_doc,
+"factorial(x) -> Integral\n"
+"\n"
+"Find x!. Raise a ValueError if x is negative or non-integral.");
static PyObject *
math_trunc(PyObject *self, PyObject *number)