not working with brew python on macOS

[chew-z]

General informations

I have noticed this morning that brew update && brew upgrade changed/linked 'python' to 'python3'. This is good perhaps but it resulted in offlineimap not working anymore on my system because 'commands' had been removed from python3.

Logs, error

$ offlineimap
OfflineIMAP 7.1.5
  Licensed under the GNU GPL v2 or any later version (with an OpenSSL exception)
imaplib2 v2.57 (bundled), Python v3.6.4, OpenSSL 1.0.2n  7 Dec 2017
ERROR: No module named 'commands'
ERROR: Exceptions occurred during the run!
ERROR: No module named 'commands'

$ python --version
Python 3.6.4

[nicolas33]

Yes, the support for Py3 is not ready and stalled. I have no idea why these brew commands are changing python to python3. Is there something we can do?

[arolle]

Could it be an option to change the header in libexec/offlineimap.py to #!/usr/bin/env python2?
One fix is to issue

 ln -sf "$(which python2)" "$(which python)"

[chris001]

• https://pythonclock.org

I'm nearly complete building the first real automatic tests of live email sync to run here on github for offlineimap, including support to test on MacOS, and python3. This makes updating to compatible with python3 much easier because the new code changes are verified in just 1-2 minutes on linux, macos, python 2.7 and python 3.6.

[nicolas33]

The idea of fixing the shebang is nice. Change applied on the current "next" branch. Hope this will help. Other than that I don't see what we could do, though.

Thank you all.

[sjktje]

Anyone know how to fix this temporarily until the next offlineimap release?

[chris001]

@sjktje

• You just need to edit 2 files, bin/offlineimap and offlineimap.py.
• Edit the first line in each file, from #!/usr/bin/env python, to #!/usr/bin env python2. Save each file and that's it!

[nicolas33]

@chris001 Good point. I forgot this second file in my previous patch. Fixed for offlineimap.py, too.