Defaults python2 readline support broken?

[kadrlica]

Readline cursor motion support seems to be broken with the defaults install of python=2.7.14 and the conda-forge version of r-rpostgresql. I'm running based off of an Anaconda 5.1.0 install (conda info below).

$ conda info
     active environment : None
            shell level : 0
       user config file : /home/s1/kadrlica/.condarc
 populated config files : /home/s1/kadrlica/.condarc
          conda version : 4.5.1
    conda-build version : 3.4.1
         python version : 2.7.14.final.0
       base environment : /home/s1/kadrlica/software/anaconda/anaconda2-5.1.0  (writable)
           channel URLs : https://repo.anaconda.com/pkgs/main/linux-64
                          https://repo.anaconda.com/pkgs/main/noarch
                          https://repo.anaconda.com/pkgs/free/linux-64
                          https://repo.anaconda.com/pkgs/free/noarch
                          https://repo.anaconda.com/pkgs/r/linux-64
                          https://repo.anaconda.com/pkgs/r/noarch
                          https://repo.anaconda.com/pkgs/pro/linux-64
                          https://repo.anaconda.com/pkgs/pro/noarch
          package cache : /home/s1/kadrlica/software/anaconda/anaconda2-5.1.0/pkgs
                          /home/s1/kadrlica/.conda/pkgs
       envs directories : /home/s1/kadrlica/software/anaconda/anaconda2-5.1.0/envs
                          /home/s1/kadrlica/.conda/envs
               platform : linux-64
             user-agent : conda/4.5.1 requests/2.18.4 CPython/2.7.14 Linux/2.6.32-696.20.1.el6.x86_64 scientificfermi/6.4 glibc/2.12
                UID:GID : 47737:9620
             netrc file : /home/s1/kadrlica/.netrc
           offline mode : False

conda create -n rpsql-test python=2.7.14 r-rpostgresql --channel defaults --channel conda-forge

Solving environment: done

## Package Plan ##

  environment location: /home/s1/kadrlica/software/anaconda/anaconda2-5.1.0/envs/rpsql2

  added / updated specs: 
    - python=2
    - r-rpostgresql


The following packages will be downloaded:

    package                    |            build
    ---------------------------|-----------------
    setuptools-39.0.1          |           py27_0         582 KB
    pip-9.0.3                  |           py27_0         2.4 MB
    certifi-2018.4.16          |           py27_0         142 KB
    wheel-0.31.0               |           py27_0          61 KB
    ------------------------------------------------------------
                                           Total:         3.2 MB

The following NEW packages will be INSTALLED:

    bzip2:           1.0.6-h9a117a8_4              
    ca-certificates: 2018.03.07-0                  
    cairo:           1.14.12-h77bcde2_0            
    certifi:         2018.4.16-py27_0              
    curl:            7.59.0-h84994c4_0             
    fontconfig:      2.12.6-h49f89f6_0             
    freetype:        2.8-hab7d2ae_1                
    glib:            2.53.6-h5d9569c_2             
    graphite2:       1.3.11-hf63cedd_1             
    gsl:             2.4-h1bed415_3                
    harfbuzz:        1.7.6-hc5b324e_0              
    icu:             58.2-h9c2bf20_1               
    jpeg:            9b-h024ee3a_2                 
    krb5:            1.16-h3f6afd0_6               
    libcurl:         7.59.0-h1ad7b7a_0             
    libedit:         3.1.20170329-0     conda-forge
    libffi:          3.2.1-hd88cf55_4              
    libgcc:          7.2.0-h69d50b8_2              
    libgcc-ng:       7.2.0-hdf63c60_3              
    libpng:          1.6.34-hb9fc6fc_0             
    libpq:           10.3-h1ad7b7a_0               
    libssh2:         1.8.0-h9cfc8f7_4              
    libstdcxx-ng:    7.2.0-hdf63c60_3              
    libtiff:         4.0.9-h28f6b97_0              
    libxcb:          1.13-h1bed415_1               
    libxml2:         2.9.8-hf84eae3_0              
    ncurses:         5.9-10                        
    openssl:         1.0.2o-h20670df_0             
    pango:           1.40.11-h8191d47_0            
    pcre:            8.39-1                        
    pip:             9.0.3-py27_0                  
    pixman:          0.34.0-hceecf20_3             
    python:          2.7.14-ha6fc286_23            
    r-base:          3.4.1-3            conda-forge
    r-dbi:           0.6_1-r3.4.1_0                
    r-rpostgresql:   0.6_2-r3.4.1_0     conda-forge
    readline:        7.0-hb321a52_4                
    setuptools:      39.0.1-py27_0                 
    sqlite:          3.23.1-he433501_0             
    tk:              8.6.7-hc745277_3              
    wheel:           0.31.0-py27_0                 
    xz:              5.2.3-h55aa19d_2              
    zlib:            1.2.11-ha838bed_2             

Proceed ([y]/n)? y


Downloading and Extracting Packages
setuptools 39.0.1############################################################ | 100% 
pip 9.0.3#################################################################### | 100% 
certifi 2018.4.16############################################################ | 100% 
wheel 0.31.0################################################################# | 100% 
Preparing transaction: done
Verifying transaction: done
Executing transaction: done
#
# To activate this environment, use
#
#     $ conda activate rpsql2
#
# To deactivate an active environment, use
#
#     $ conda deactivate

$ python
Python 2.7.14 |Anaconda, Inc.| (default, Nov  8 2017, 22:44:41) 
[GCC 7.2.0] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> abcd^A^A^F

Ctrl-A should take the cursor to the beginning of the line, but instead it prints ^A.

[kadrlica]

I'll note that using just --channel conda-forge does not have this problem. It's ok to tell me "conda-forge never promised compatibility with defaults", but if there's an easy fix that would be great.

[kadrlica]

This problem does not occur with r-rpostresql from --channel chenghlee.

[jdblischak]

It's ok to tell me "conda-forge never promised compatibility with defaults",

You guessed it!

https://conda-forge.org/docs/conda-forge_gotchas.html#using-multiple-channels

but if there's an easy fix that would be great.

Is there a particular reason you want to use python from defaults and r-base from conda-forge? In general if you want to use conda-forge packages, you should prioritize it over the defaults channel. Either in your ~/.condarc file or at the command line, e.g. -c conda-forge -c defaults prioritizes conda-forge.

https://conda-forge.org/docs/conda-forge_gotchas.html#how-to-fix-it

[kadrlica]

Thanks. There are reasons that I prefer defaults (but perhaps not a particularly good ones). I've got this working with the older version from chenghlee.