Re: [IBMiOSS] Error installing pandas

We ship the Python packages as eggs/wheels under Python-pkgs. It's up to
the customer to install these packages with easy_install or pip to place
them in to site-packages. We do this so you can update the package using
pip and it won't be blown away by a PTF update. This is documented on our
wiki:
https://www.ibm.com/developerworks/community/wikis/home?lang=en#!/wiki/IBM%20i%20Technology%20Updates/page/Installing%20shipped%20add-ons

"OpenSource" <opensource-bounces@xxxxxxxxxxxx> wrote on 06/20/2016
02:00:41 PM:

From: John Yeung <gallium.arsenide@xxxxxxxxx>
To: IBMi Open Source Roundtable <opensource@xxxxxxxxxxxx>
Date: 06/20/2016 02:02 PM
Subject: Re: [IBMiOSS] Error installing pandas
Sent by: "OpenSource" <opensource-bounces@xxxxxxxxxxxx>

On Mon, Jun 20, 2016 at 1:53 PM, Aaron Bartell <aaronbartell@xxxxxxxxx>

wrote:

*>(A huge step would be to install ibm_db and itoolkit.)*

Both should be installed on Litmis Spaces. Run the following command

to

see: ls -all /QOpenSys/QIBM/ProdData/OPS/Python-pkgs

I think you meant either -al or -alF, rather than -all (each letter is
its own switch; there's no advantage to repeating a switch).

I was expecting those packages to be installed in Litmis Spaces
already, and indeed they do show up in the directory you've shown. But
I had no idea that was where they were until you told me. Anyone
familiar with Python will be looking for a directory called
site-packages[1].

I guess for now the simplest way to import them is to manually add the
necessary directory to the search path from within Python:

import sys
sys.path.append('/QOpenSys/QIBM/ProdData/OPS/Python-pkgs')
import ibm_db

But really, this is something that should be fixed.

[1]Python comes with a module called site. It has functions that
affect how the interpreter searches for packages to import. You can
see where Python is expecting to find installed packages as follows
(from the Python prompt):

import site
site.getsitepackages()

If those directories don't exist, they don't make it into sys.path.

I think something probably has to be done about the directory
structure anyway, because you absolutely have to have different
site-packages for different versions of Python. Sure, a Litmis space
can probably be configured to only have one version of Python, but
that seems like an artificial limitation.

Also, we can expect some extra effort in these initial stages of

adopting

open source on IBM i**. The key is ~documenting~ our progress so the

next

person doesn't have to go through the same hoops. Documenting can

happen

in many locations (stackoverflow.com, github gists, blogs, wikis,

etc).

Also, feel free to make a new Python page at the following link to

document

resolutions: https://bitbucket.org/ibmi/opensource/wiki/Home

Totally agree. I will see what I can do, though I can't promise
anything as my time is even more limited than usual.

John Y.
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