Arrow keys in Putty returning ^[[A ^[[D ^[[B instead of moving the cursor

Has anyone else ever had this error in PuTTy?

For example, pressing the Up Key now produces:

>>> ^[[A

Google doesn't let you search for special characters so I'm stumped at finding existing version of this problem.

EDIT:

So this happened after I pasted in some unicode (when, I think, the translation was already set to utf-8).

I've checked the Change Settings dialog box for different settings than my other open PuTTy windows, but the settings appear to be identical.

EDIT2:

This is fixed by restarting PuTTy, but still a nuisance.

EDIT3:

How to replicate the exact same bug:

Open a putty terminal to a linux PC (I'm using RedHat)
Open Python 2.7.* - using the command python2.7 (note: error does not appear in 2.6)
import codecs
Now use the arrow keys, and these bizarre characters appear.

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You could try changing the 'Application Cursor Keys' mode. It's in the Terminal->Keyboard subsection of the initial configuration window (these settings may potenitally be overridden by your server).

http://the.earth.li/~sgtatham/putty/0.55/htmldoc/Chapter4.html#S4.4.4

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For those interested in the issue, had same simptoms in a virtualenvironment, resolved the issue with

pip install readlines

See following answer for details.

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In my experience that's because "bash" is not running. Simply run "/bin/bash" to enjoy colors, history and more.

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Just run the simple bash command or sudo bash in ssh. It usually works.

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I've found that specifying "The Function Keys and Keypad" option to match your operating system resolves many issues.

[Putty]

Terminal -> Keyboard --> RadioButton "Linux"

(if you're using Linux) and then you can start your session

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Terminal >>> Local line editing >>> Force off