wesm commented on a change in pull request #7537:
URL: https://github.com/apache/arrow/pull/7537#discussion_r445221159
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File path: cpp/src/arrow/python/helpers.cc
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@@ -254,14 +255,45 @@ bool PyFloat_IsNaN(PyObject* obj) {
return PyFloat_Check(obj) && std::isnan(PyFloat_AsDouble(obj));
}
+namespace {
+
+static std::once_flag pandas_static_initialized;
+static OwnedRef pandas_NaTType;
Review comment:
@pitrou this seemed worrisome to me so could use your advice about how
to import this symbol once and then have it persist. Another option is that I
could immediately decref the object returned by `PyObject_Type` and put a
`PyObject*` here with the near certainty that this object will remain alive
until the end of the Python session
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