unmounted unmounted - 1 month ago 21
Python Question

How to save a Python interactive session?

I find myself frequently using Python's interpreter to work with databases, files, etc -- basically a lot of manual formatting of semi-structured data. I don't properly save and clean up the useful bits as often as I would like. Is there a way to save my input into the shell (db connections, variable assignments, little for loops and bits of logic) -- some history of the interactive session? If I use something like

script
I get too much stdout noise. I don't really need to pickle all the objects -- though if there is a solution that does that, it would be OK. Ideally I would just be left with a script that ran as the one I created interactively, and I could just delete the bits I didn't need. Is there a package that does this, or a DIY approach?

UPDATE: I am really amazed at the quality and usefulness of these packages. For those with a similar itch:


  • IPython -- should have been using this for ages, kind of what I had in mind

  • reinteract -- very impressive, I want to learn more about visualization and this seems like it will shine there. Sort of a gtk/gnome desktop app that renders graphs inline. Imagine a hybrid shell + graphing calculator + mini eclipse. Source distribution here: http://www.reinteract.org/trac/wiki/GettingIt . Built fine on Ubuntu, integrates into gnome desktop, Windows and Mac installers too.

  • bpython -- extremely cool, lots of nice features, autocomplete(!), rewind, one keystroke save to file, indentation, well done. Python source distribution, pulled a couple of dependencies from sourceforge.



I am converted, these really fill a need between interpreter and editor.

Answer

IPython is extremely useful if you like using interactive sessions. For example for your usecase there is the %save magic command, you just input %save my_useful_session 10-20 23 to save input lines 10 to 20 and 23 to my_useful_session.py. (to help with this, every line is prefixed by its number)

Look at the videos on the documentation page to get a quick overview of the features.