Can anyone explain exactly what PYTHON (perhaps OP PYTHON) was in a post-WW2 British Army context. I have come accross mention of PYTHON a few times, for example: 1. Referring to UK leave after service overseas. 2. On Great Grandfathers service records. 3. In an article about the British Military Mission to Saudi Arabia 1946-51 where it states that "All ranks were granted annual leave of one month (the tour with the Mission being a normal âPythonâ of 3 years)." I have tried trawling the internet but keep coming up with Monty Python related links or other Op Pythons. Can anyone clarify please.