Check which of your dependencies already support python 3.
$ py3support requirements.txt Python 3 support level: 50% (2/4) Python 3 ======== requests==1.0.4 docutils==0.10 Python 2 ======== Flask==0.9 Unknown ======= PIL==1.1.6
How it works
The only easy way to tell if package supports python 3 is to trust author's classifiers. This tool hits PyPI index to check what python versions do your dependencies support. NOTE: We do not need to inspect dependencies of packages in requirements.txt, because we rely on classifiers only.
Some packages might support python 3, but do not have required metadata, some packages might state py3 support, but it's not there yet (gunicorn). After all, a lot of package authors don't provide python version classifiers at all.
- Check python 3 compatibility for latest version in PyPI
- If not requirements.txt exists make use of pip freeze
- py3support check Flask==0.9
- Handle development versions -e
- Add progressbar
- Search for python 3 forks at github
- Handle package names with wrong CaSe (?)