Only tested on iOS 8.4/9.0.2, ARM64, untethered jailbreak.
Do not use it on tethered jailbreak device, it may break the system, and cause white apple.
If you do want to use it on tethered jailbreak device, I suggest that unpacking the deb and install it manually, make sure not overriding any system library(libncurses.5.4.dylib, libpanel.5.4.dylib, using install_name_tool to change lib id, path).
Install
dpkg -i python-v2.7.6-proteas-2015-11-30.deb
dpkg -i lldb-v3.8.0-proteas-2016-05-06.deb
Uninstall
dpkg -r python
dpkg -r lldb
Known Issues
discard messages which outputting to stdout & stderr.