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Python shell: Arrow keys not working in PuTTY

+2 votes

I want to use the Python 3.4 interpreter interactively (with centos 5), via a PuTTY ssh session. Currently, the arrow keys do not work:

$ /usr/local/bin/python3.4 

Python 3.4.2 (default, Feb 11 2015, 15:06:33) 

[GCC 4.1.2 20080704 (Red Hat 4.1.2-55)] on linux 

Type "help", "copyright", "credits" or "license" for more information. 

>>> ^[[A 

I tried the following thread also

which suggests that the problem can be fixed by installing the readline package followed by the rebuild of Python. Can anyone comment on the easiest way to fix this? Is a rebuild of Python necessary?

posted Feb 23, 2015 by anonymous

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1 Answer

+1 vote

Please try below steps:

  1. Open a putty terminal to a linux PC (I'm using RedHat)
  2. Open Python 2.7.* - using the command python2.7 (note: error does not appear in 2.6)
  3. import codecs
  4. Now use the arrow keys, and these bizarre characters appear.
answer Feb 25, 2015 by Amit Kumar Pandey
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Let's say I want to compare two csv files: file A and file B. They are both similarly built - the first column has product IDs (one product per row) and the columns provide some stats about the products such as sales in # and $.

I want to compare these files - see which product IDs appear in the first column of file A and not in B, and which in B and not A.
Finally, it would be very great if the result could be written into two new CSV files - one product ID per row in the first column. (no other data in the other columns needed)

This is the script I tried:

import csv

#open CSV's and read first column with product IDs into variables pointing to lists
A = [line.split(',')[0] for line in open('Afile.csv')]
B = [line.split(',')[0] for line in open('Bfile.csv')]

#create variables pointing to lists with unique product IDs in A and B respectively 
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print inAnotB
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