Hi again--

To update with a change to my status for future generations:
The conda install -c conda-forge fix made python better, but broke many other things.  
I tried 
conda remove --force readline
and it seems to make my shell _and_ python function properly.  So that seems to be the thing to do.  I'll post back if any other issues arise.

d.

On Tue, Nov 21, 2017 at 3:08 PM, David Collins <dcollins4096@gmail.com> wrote:
Ah, great, that did it.  I tried just
% conda install readline
but for some reason that didn't fix it.  
In your second suggestion, it specified a version through conda-forge, which did the trick.

Thanks a ton for your help, I appreciate it.

d.

On Tue, Nov 21, 2017 at 2:56 PM, Nathan Goldbaum <nathan12343@gmail.com> wrote:
It looks like installing readline from conda-forge will also fix this:


On Tue, Nov 21, 2017 at 2:55 PM Nathan Goldbaum <nathan12343@gmail.com> wrote:
This seems to be this issue:


Perhaps try this solution suggested in the comments of that issue:

On Tue, Nov 21, 2017 at 2:27 PM David Collins <dcollins4096@gmail.com> wrote:
Hi, Everybody!

I'm running yt on Pleiades, and I'm running into a readline error (below)
Has anyone else run into this, and do you know what I can do to fix this?  This is a recent build, not from source.

Thanks!

pleiades:~/yt3_scripts>python
Python 2.7.13 | packaged by conda-forge | (default, May  2 2017, 12:48:11)
[GCC 4.8.2 20140120 (Red Hat 4.8.2-15)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
Traceback (most recent call last):
  File "/etc/pythonstart", line 7, in <module>
    import readline
ImportError: /u/dccolli1/local-yt-2017-09-28/yt-conda/lib/python2.7/lib-dynload/../../libreadline.so.6: undefined symbol: PC
>>>  


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