Previously, restarting a kernel in the qtconsole always cleared the
entire session. Since qtconsole has a %clear command, it makes sense to
allow users to decouple the two activities - the restarting of kernels,
and clearing the console. This commit adds a configuration option which
allows for the restarting of kernels without losing console history. The
default value for clear_on_kernel_restart is set to True to stay
consistent with the way things worked before this functionality was
To test, run:
ipython qtconsole --IPythonWidget.clear_on_kernel_restart=False
Here's what it looks like when the user restarts the kernel on In:
Python 2.6.5 (r265:79063, Apr 16 2010, 13:57:41)
Type "copyright", "credits" or "license" for more information.
IPython 0.13.dev -- An enhanced Interactive Python.
? -> Introduction and overview of IPython's features.
%quickref -> Quick reference.
help -> Python's own help system.
object? -> Details about 'object', use 'object??' for extra details.
%guiref -> A brief reference about the graphical user interface.
In : 0x42
In : 042
In : # restarting kernel...
I originally made a new method (reset_on_restart) to accommodate this
new functionality, but it turns out I ended up needing to replicate
almost everything that reset() already does inside this new method. In
particular, reset_on_restart did not work properly when restarting a
kernel that was in debug mode.
Everything should now work, and we don't have another method to deal