inline plot in ipython

[Gio Piantoni]

Hi,

Thanks for the amazing package, it's really fantastic.

I'm trying to plot inline figures with ipython (qtconsole or notebook) and it works well. I implemented my own class and it works fine if I run each command separately but when they are in the same cell the figure is not updated. See attachment ipython_inline.html for an example. Running ipython (2.4.1), pyqt (4.11.2) and QT (4.8.6), pyqtgraph (0.9.10) with python 3.4.2 in a virtualenv in Debian Testing.

How can I update / redraw the figure before writing it inline? I searched for terms like "update" / "redraw" / "flush" / "exec" / "force" in the code and in this forum but I don't know if I should call a function in ipython, qt, pyqt or pyqtgraph.

Thank you!
-g

[Luke Campagnola]

Interesting! I had no idea pyqtgraph could be used with ipython notebook. If you can get this class working reliably then I'd like to add it to pyqtgraph. 

I tried the code you linked to and I get the same result in both cases:

This is with ipython 2.4.1 and pyqtgraph 0.9.10 as well.
However if I add `QApplication.processEvents()` to the end of `MyFigure.__init__()` then everything seems to work correctly. 

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[Gio Piantoni]

Great, I didn't know you could use processEvents as a static method, that's neat. Thanks!

FYI, I modified _repr_png_ so that it can deal with opengl images as well (see attachment)

[Merlin von Soosten]

That looks interesting,

however when I try this my Ipython kernel dies with the message:

QWidget: Must construct a QApplication before a QPaintDevice

How do I do that in the notebook?

[Gio Piantoni]

try:
%gui qt
at the beginning of your notebook / ipython session

[Merlin von Soosten]

Great that did the trick, thanks!