Re: [IBMiOSS] Python, ACS, Open Source and MKDocs

On Mon, Dec 21, 2020 at 4:16 PM Joe Pluta <joepluta@xxxxxxxxxxxxxxxxx> wrote:

Can any of the Python experts on the list here please tell me what this
means?

Specifically this:

File
"/QOpenSys/pkgs/lib/python3.6/site-packages/pkg_resources/__init__.py",
line 860, in resolve
raise VersionConflict(dist, req).with_context(dependent_req)
pkg_resources.ContextualVersionConflict: (tornado 6.1
(/QOpenSys/pkgs/lib/python3.6/site-packages),
Requirement.parse('tornado<6'), {'livereload'})

If I read this correctly, it looks like there is a requirement
definition somewhere specifying that I must have a tornado package whose
release is less than 6.

You are reading that correctly.

Now, I am not expert enough to really know the full picture, but I can
tell you a little more than you already know in this case.

There is a package called `livereload`. (I'm using backticks to
indicate literal characters.)

It is the package with that requirement. But the weird thing is that
it only requires `tornado` less than 6 when paired with Python 2.7!

See this file in the GitHub repo for `livereload` (you can probably
find the corresponding file somewhere in your `site-packages`):

https://github.com/lepture/python-livereload/blob/master/setup.py

And yes, I see all the error messages you quoted mention 3.6, but
somehow, *something* is thinking that you are trying to use 2.7. Maybe
some build step somewhere happened to use the `python` command in a
context where it was not the same as `python3`, and thus picked up the
Python 2.7 on your system. (We all have 2.7 on our system, even if we
didn't explicitly choose it, because for now, `yum` itself depends on
it!)

John Y.