Rate limiting tools for http requests

Various small helpers that simplify ratelimiting external requests. Needs redis.

TODO: refactor Core.http_agent assumption

Name		Name	Last commit message	Last commit date
Latest commit History 3 Commits
.gitignore		.gitignore
LICENSE		LICENSE
LICENSE.txt		LICENSE.txt
MANIFEST.in		MANIFEST.in
README.rst		README.rst
setup.cfg		setup.cfg
setup.py		setup.py
txbackoff.py		txbackoff.py

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