[Robin Becker] > Someone from the Zope list tells me that the list pop and append > operations are thread safe. Is this the case? All list methods are atomic. > How can one tell if particular bits of python code are 'atomic'? Decades of experience <wink>. Save a few years by reading FAQ entry 4.88 first. or-just-search-the-faq-for-"atomic"-ly y'rs - tim