gevent 1.0.1 (old) causes issue on Debian 8.0 Jessie : Disk running out of free space
Cause: /var/log/syslog and /var/log/daemon.log full of "NameError: name 'PROTOCOL_SSLv3' is not defined"
FYI: disk of 20GB runs out of space in less than 24h!
gevent 1.0.2 release notes : https://github.com/gevent/gevent/blob/1.0.2/changelog.rst#release-102-may-23-2015
While calling `pip install -r requirements.txt`, the PyChart tarball is
always downloaded even if `pip` has a download cache configured (which
it does by default in later versions).
This is because `pip` has no way of knowing which package the PyChart
tarball contains before downloading and running its `setup.py`.
By declaring the PyChart "egg" in `requirements.txt` the tarball is no
longer downloaded if it's already in the download cache.