We do something similar at embedly, except instead of dh-virtualenv we have our own homegrown solution. I wish I new about dh-virtualenv before we created it.
Basically, what it comes down to a build script that builds a deb with the virtualenv of your project versioned properly(build number, git tag), along with any other files that need to be installed (think init scripts and some about file describing the build). It also should do things like create users for daemons. We also use it to enforce consistent package structure.
We use devpi to host our python libraries (as opposed to applications), reprepro to host our deb packages, standard python tools to build the virtualenv and fpm to package it all up into a deb.
All in all, the bash build script is 177 LoC and is driven by a standard build script we include in every applications repository defining variables, and optionally overriding build steps (if you've used portage...).
The most important thing is that you have a standard way to create python libraries and application to reduce friction on starting new projects and getting them into production quickly.
Basically, what it comes down to a build script that builds a deb with the virtualenv of your project versioned properly(build number, git tag), along with any other files that need to be installed (think init scripts and some about file describing the build). It also should do things like create users for daemons. We also use it to enforce consistent package structure.
We use devpi to host our python libraries (as opposed to applications), reprepro to host our deb packages, standard python tools to build the virtualenv and fpm to package it all up into a deb.
All in all, the bash build script is 177 LoC and is driven by a standard build script we include in every applications repository defining variables, and optionally overriding build steps (if you've used portage...).
The most important thing is that you have a standard way to create python libraries and application to reduce friction on starting new projects and getting them into production quickly.