[Bug 1445764] Re: "The executable /usr/bin/python3.4 does not exist" error when Installing Mailman 3 on Centos 7

[Mark Sapiro]

I'm not sure why the buildout process is not installing a working
python3.4 in mailman-bundler/venv-3.4/, but it isn't. I suggest the
following:

1) remove all the symlinks you added. Ones mentioned in the thread
starting at <https://mail.python.org/pipermail/mailman-
developers/2015-April/024894.html> include:

ln -s /usr/local/bin/python /usr/bin/python
ln -s /usr/local/bin/python3.4 /usr/local/bin/python3
ln -s /usr/local/bin/python3.4 /usr/bin/python3.4

You may not have added all those and you may have added others, but
remove all you added.

2) remove the venv and venv-3.4 directories from mailman-bundler/

3) If your mailman-bundler is not at rev. 62, at least do a bzr pull to
update it. Better still, remove mailman-bundler/ and start from the
beginning.

4) if after running buildout you still don't have a working Python 3 in
mailman-bundler/venv3-4, you can probably "fix" it by removing mailman-
bundler/venv3-4/lib/python3.4 and replacing it with a symlink to
/usr/local/lib/python3.4, but it's not clear to me that the prior
symlinking is not somehow involved with the current issue so you should
proceed with caution.

The real issue here is why is buildout not installing a complete,
working python3.4 in venv-3.4.

What happens if you just do

cd
virtualenv -p python3.4 xxx
./xxx/bin/python

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https://bugs.launchpad.net/bugs/1445764

Title:
  "The executable /usr/bin/python3.4 does not exist" error when
  Installing Mailman 3 on Centos 7

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