On 10 November 2017 at 23:03, Robert McLeod <robbmcleod@gmail.com> wrote:
E.g. in `requirements.txt`:

numpy;    python_version>"3.0"
numpylts; python_version<"3.0"

In both cases you still call `import numpy` in the code.
 
For this to be efficient, it should be done soon enough to allow downstream projects to adapt their requirements.txt.

Release managers: how much more effort would it be to upload current numpy to both numpy and numpylts?

/David.