Using IPython as your default shell
Thursday, October 29, 2009 - 46 commentsIf you are a shell addicted person and like Python, then the IPython was made just for you! The IPython provides a very usefull feature (that may looks a bit strange at first) of mixing Python and Shell commands in a easy and intuitive way. I don't pretend to say why you should use IPython instead of your current shell but I think that, if you know Python, you should prefer to write Python code instead of Bash code.
I'll assume that you already have the IPython installed but if you don't, take a look at IPython's documentation to see how to install it. I'm running Debian and my setup is focused in my machine, so it should work for the most of the others linux distros but if you are running a different system, I'm sorry for you you may have to adapt some commands and/or paths. :)
Configuring the IPython's prompt
The first time you run IPython, it displays a warning about the creation of your personal configuration directory. One of the most important parts of this warning is about the new configuration file: ~/.ipython/ipy_user_conf.py. So let's configure this file and the IPython's prompt to make it looks exactly like the Debian's prompt. Edit your configuration file and change the following settings as below:
...
import ipy_profile_sh
...
o.prompt_in1 = r'\C_Normal\u@\H:\Y2$ '
o.prompt_in2 = r'\C_Normal... '
...
The first option, import ipy_profile_sh, avoid you to have to escape all the Bash commands. The second and third options, o.prompt_in1 and o.prompt_in2, change the IPython's prompt. And now start the IPython as follow:
afurlan@merlin:~$ ipython -nosep -nobanner -noconfirm_exit
afurlan@merlin:~$
afurlan@merlin:~$
afurlan@merlin:~$ print 'hello python!'
hello python!
afurlan@merlin:~$ echo 'hello bash!'
hello bash!
Now you're able to run Python commands:
afurlan@merlin:~$ for line in open('domains.txt'):
... print line
...
...
afurlan.org
blog.afurlan.org
And a mixed of Python and Bash commands:
afurlan@merlin:~$ for line in open('domains.txt'):
... echo "$line"
...
...
afurlan.org
blog.afurlan.org
afurlan@merlin:~$ for line in open('domains.txt'):
... echo "$line.strip()"
...
...
afurlan.org
blog.afurlan.org
Setting the IPython as your default shell
Actually I don't like to set the IPython as my default shell... I use to run screen so I configure it to open five IPython sessions by default but if you really like to set it as your default shell, you can add the following line at the end of your ~/.bashrc file:
...
exec ipython -nosep -nobanner -noconfirm_exit
If you're a screen user too, you can add the following lines at your ~/.screenrc:
...
# open 5 ipython sessions by default
screen -t p 1 ipython -nosep -nobanner -noconfirm_exit
screen -t p 2 ipython -nosep -nobanner -noconfirm_exit
screen -t p 3 ipython -nosep -nobanner -noconfirm_exit
screen -t p 4 ipython -nosep -nobanner -noconfirm_exit
screen -t p 5 ipython -nosep -nobanner -noconfirm_exit
...
Or, if you like, you can also get my current .screenrc file.
And, as always: if you found some english bug, warn me and I'll be glad to fix it. :)
Very nice tips.
There's a mistake on the second paragraph, it would be better to use: "... so it should WORK for most of THE others linux distros ...".
Take care!
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