Python Interpreter in Emacs repeats lines

Question

What is happening:

>>> 2 * 10
2 * 10
20
>>>

What I want to happen:

>>> 2 * 10
20
>>>

Does anyone know why the command is printed out before being executed and how to stop it from doing that? I can't find any documentation about this. I'm using Emacs 23 on Mac OS X with Python 2.7.

How are you starting the Python process? `run-python`, `python-shell`? — harto, Nov 09 '11 at 06:06
Another way is to start `ansi-term` and then `ipython` inside it. — Maxim Egorushkin, Nov 09 '11 at 08:31
Well, I didn't know about ansi-term. I've been using M-x shell so thanks for that. — methodmain, Nov 09 '11 at 17:19

score 12 · Accepted Answer · answered Nov 20 '11 at 01:24

12

I don't use python, but I would guess that the python feature you are using has set the variable comint-process-echoes incorrectly. Whatever the value in your buffer is, just reverse the boolean value.

Comint is a support library in Emacs for running inferior processes in Emacs. It interacts with the prompts, and the python shell (or M-x shell) needs to be told about the echo feature.

In your shell buffer with the problem, do:

M-: (setq comint-process-echoes t)  ;; or nil

answered Nov 20 '11 at 01:24

Eric

3,959
17
15

2

This works for me, too! I wonder if you can help with [my question](http://stackoverflow.com/questions/9830729/emacs-python-echoing-hooks-and-org-mode) which regards running this in a hook every time python starts up? – alexplanation Mar 30 '12 at 19:47
@Eric I am using Elpy on Emacs in ubuntu I do have the same problem but this solution is not working.Can help me out – Nithin Varghese Jan 17 '18 at 16:59
I have found solution by setting the variable **elpy-shell-echo-input** to nil – Nithin Varghese Jan 17 '18 at 17:04

Python Interpreter in Emacs repeats lines

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