AFAIK, there are no open archives with scanned soviet newspapers and text search, so it's hard to say for sure, but I believe it wasn't discussed at all. Because almost no-one watched Monty Python sketches and knew about its existence. Even creators of soviet TV program 'Jolly Fellows' (Веселые ребята) hadn't heard about Monty Python till 1983, and 'Jolly Fellows' was in some ways quite similar to Monty Python (absurd jokes, heavy use of video editing and so on). One of these jolly fellows, Andrey Knyshev, was invited by British embassy worker to watch some sketches on VCR, and it seems he liked it although he definitely didn't get some jokes (or, maybe, most of them). For example, for the next seven years Andrey thought that ministry of silly walks is the ministry of silk works, and he thought it was very poetic and crazy in a good way.

It's funny but the second participant of Jolly Fellows was invited to work in London several years later, and he watched some sketches there, and he wasn't impressed at all (again, maybe, because his English was not fluent at the time).

Terry Gilliam visited USSR with his movie Brazil, but it was in 1985, and The Life of Brian was an old story by then.

So, long story short. Nobody knew, nobody cared.

History of Jolly Fellows on Soviet TV (with quotes from Knyshev and Kryukov), in russian