How to check if block offsets have been calculated?

[hyanwong]

Sorry to keep on opening issues! Is there any way to check whether an IndexedBzip2File has had block offsets calculated yet or not? If it takes 8 hours to calculate them for my huge file, it's worth checking before running e.g. a seek(), and outputting a warning that this might take some time.

[mxmlnkn]

:) I'm glad someone uses it and cares enough to give feedback. Initially, this project only started to keep the required C++ bz2 code base for ratarmount separate from the python-only tar mount script. That's why the indexed_bzip2 interface is still fairly limited.

I see no harm in adding such a method. Will do.

[hyanwong]

Thanks. Incidentally, your code has sped up my workflow so that running my script (to parse Wikidata/Wikipedia files for https://www.onezoom.org) now takes under an hour with 64 processes, whereas it used to take 2 days. That's a huge difference, and makes my life so much easier. So I'm very grateful!

[mxmlnkn]

I added a block_offsets_completed function and even a available_block_offsets method, which only returns those already calculated up to this point.