Replace redisearch python package with redis >= 4.0.0

[nathanweeks]

Per the RediSearch/redisearch-py repo, the redisearch python package has been deprecated as of redis-py 4.0.0, as its functionality was absorbed into the latter. Will need to get on the bandwagon at some point and make the switch in this repo.

[alancleary]

Thanks for creating an issue, Nathan. I hadn't noticed the deprecation notice.

Looking at the redis-py source, it looks like they basically copy-pasted the redisearch library in as a module, so migrating shouldn't be too difficult, in theory. Unfortunately, it looks like there still isn't support for aio, so my little aio shim layer will have to remain. Maybe I'll create an issue in the redis-py repo for this...

[alancleary]

Apparently redis-py is also absorbing aioredis (one library to rule them all!). This will be official in the imminent 4.2.0 release, so I'll hold off on tackling this issue until 4.2.0 is out. In the meantime I'll open an issue on redis-py about whether or not the absorbed redisearch module will work with the aioredis client once its assimilation is complete.

[alancleary]

Release 4.2.0 is out! I'll get going on this as soon as I can.

I opened an issue regarding aio support within the RediSearch module and the initial response suggested that it may be a while before they have integration. Oh well. Our aio wrapper works just fine so this issue can move ahead with that.

[alancleary]

The redisearch-py authors confirmed in the issue I previously mentioned that support for aio was added to the redis-yp redisearch module in release 4.3.1, meaning this work can now include removing our custom aio wrapper for redisearch.

[alancleary]

Commit c62a957 updated the chromosome service to use the redis package in place of the aioredis and redisearch packages.

Edit: Whoops. It was the genes service I updated, not the chromosome service. I pushed a new commit that overwrites the previous commit to correct the erroneous message: 7367958

[alancleary]

Updated the chromosome service in commit 7f097e7.

[alancleary]

Updated the micro-synteny search service in commit 3060d3d.

[alancleary]

Updated the pairwise macro-synteny blocks service in commit bd81a24.

[alancleary]

Updated the macro-synteny service in commit f8680ad. Note: this uncovered a bug in the redisearch module of the redis package, which I've opened an issue for: redis/redis-py#2279

[alancleary]

Updated the gene search service in commit 1a30d38.

[alancleary]

Updated the chromosome region service in commit 026cb2f.

[alancleary]

Updated the chromosome search service in commit 3fcb0de.

[alancleary]

I removed the aioredis dependency from the search service in commit 68067a8. I did not replace it with the redis package because the service isn't actually using redis!

[alancleary]

Updated the redis_loader in commit 12e1c12.

[alancleary]

All Python packages have been updated to redis 4+. Closing.