Replicate ipython history behaviour in Emacs

Question

Say, we've entered the following in the normal ipython shell.

In [1]: 1+1
Out[1]: 2

In [2]: 1+2
Out[2]: 3

In [3]: 2+4
Out[3]: 6

If I now enter:

In [4]: 1+

and press the up arrow key, ipython will offer +1 and +2, i.e. I can skip over 2+4. How do I replicate this behaviour using Emacs' ipython shell (IPy mode).

Answer 1

Not sure which ipy mode, You are referring. I use ipython shell which comes with elpy. It also has the same problem.

By default up arrow (or M-p) are bind to (comint-previous-input ARG). So no matter what You have at cursor, it just shows the previous input.

There is another function called (comint-previous-matching-input-from-input N) which basically gives the previous matching input for the input at cursor. It is bind to C-c M-p.

So if type something and press C-c M-p it takes to previous match.