Build dependencies for Python-dependent packages must be declared for every Python version that the package is built for.
The python3-all-dev should be used when building
extensions for any or all Python 3 versions.
The python-all-dev should be used when building
extensions for any or all Python 2 versions. To build for a specific
version or versions, declare Build-Depends on
python.
X.Y-dev
Some applications and pure Python modules may be able to avoid
dependency on the -dev packages, and declare
Build-Depends on the runtime environment only
(python3, python3-all,
python, python-all). A package
that does not require the -dev packages must not
declare Build-Depends on them.
Declare Build-Depends on at least:
Build-Depends: python2.7 Build-Depends: python2.6 (>= 2.6-1) Build-Depends: python (>= 2.6.6-9) Build-Depends: python-all Build-Depends: python2.7-dev Build-Depends: python3.5-dev (>= 3.5.1-1) Build-Depends: python-dev (>= 2.6.6-9) Build-Depends: python-all-dev Build-Depends: python3-all-dev (>= 3.2)