requirements.txt depending on python version

Question

I\'m trying to port a python2 package to python3 (not my own) using six so that it\'s compatible with both. However one of the packages listed in requirements.txt is now in

Answer 1

You can create multiple requirements files, put those common packages in a common file, and include them in another pip requirements file with -r file_path

requirements/
  base.txt
  python2.txt
  python3.txt

python2.txt:

-r base.txt
Django==1.4 #python2 only packages

python3.txt:

-r base.txt
Django==1.5 #python3 only packages

pip install -r requirements/python2.txt