added comment

flexatone · flexatone · commit f96aae4a1c58 · 2023-02-07T19:03:28.000-08:00
diff --git a/src/_arraykit.c b/src/_arraykit.c
@@ -3455,6 +3455,7 @@ isna_element(PyObject *m, PyObject *args, PyObject *kwargs)
     if (PyArray_IsScalar(element, Timedelta)) {
         return PyBool_FromLong(PyArrayScalar_VAL(element, Timedelta) == NPY_DATETIME_NAT);
     }
+    // Try to identify Pandas Timestamp NATs
     if (PyObject_HasAttrString(element, "to_numpy")) {
         PyObject *to_numpy = PyObject_GetAttrString(element, "to_numpy");
         if (!PyCallable_Check(to_numpy)) {

Original file line number	Diff line number	Diff line change
`@@ -3455,6 +3455,7 @@ isna_element(PyObject m, PyObject args, PyObject *kwargs)`
`3455`	`3455`	`if (PyArray_IsScalar(element, Timedelta)) {`
`3456`	`3456`	`return PyBool_FromLong(PyArrayScalar_VAL(element, Timedelta) == NPY_DATETIME_NAT);`
`3457`	`3457`	`}`
	`3458`	`+ // Try to identify Pandas Timestamp NATs`
`3458`	`3459`	`if (PyObject_HasAttrString(element, "to_numpy")) {`
`3459`	`3460`	`PyObject *to_numpy = PyObject_GetAttrString(element, "to_numpy");`
`3460`	`3461`	`if (!PyCallable_Check(to_numpy)) {`