LZMAFile, LZMACompressor & LZMADecompressor are all inspired by and written to be as similar to bz2's for easier use & maintenance. I must admit that I haven't really put much thought into alternate ways to implement them beyond monkey see, monkey do.. ;)

LZMAOptions is a bit awkwardly written, but it doesn't serve documentation purposes only, it also exposes these values for max, min etc. to python (ie. as used by it's regression tests) and are also used when processing various compression options passed.

IMO it does serve a useful purpose, but certainly wouldn't hurt from being rewritten in some better way...