Always start ipython with pylab being equal to inline, but toggle it off at some time

问题

Is there any convention or configuration setting for how to start IPython shell? For example, when I start IPython, I almost always start it with pylab --inline. One approach is to create an alias, such as alias ipython="ipython --pylab inline". However, I think it's impossible to start the shell with different options (other than inline option) once I decide to create and use the alias.

So is it feasible to always start the shell with pylab=inline option, but still to toggle it off whenever I don't need it (or more correctly, whenever I want to avoid it)?

(Don't suggest to create an alias with different names, such as ipy or ipyWithPylab, please.)

Thanks.

回答1:

ipython qtconsole --help-all says :

--IPKernelApp.matplotlib=<CaselessStrEnum>
    Default: None
    Choices: ['auto', 'gtk', 'inline', 'osx', 'qt', 'qt4', 'tk', 'wx']

--IPKernelApp.pylab=<CaselessStrEnum>
    Default: None
    Choices: ['auto', 'gtk', 'inline', 'osx', 'qt', 'qt4', 'tk', 'wx']
    Pre-load matplotlib and numpy for interactive use, selecting a particular
    matplotlib backend and loop integration.

so c.IPKernelApp.matplotlib='inline'in your *_config.py(probably in ~/.ipython/profile_default) will work. Please read how to configure IPyton, usually doc explain a lot of things on how to do stuff.

Be careful though, there is a difference between having inlines figures and having a %pylab kernel. It is not possible to un-pylab a kernel (like it is impossible in python to un-import a module). With 1.0 and above and recent matplotlib, you can toggle inline/not inline with the %matplotlib <backend> magic.

来源：https://stackoverflow.com/questions/19902984/always-start-ipython-with-pylab-being-equal-to-inline-but-toggle-it-off-at-some