Compatibility with PyPlot

[ufechner7]

Hello,
I already built a nice GUI with QML.jl .
Now I want to use it together with PyPlot to plot the results. This fails:

julia> using QML

julia> using PyPlot
ERROR: InitError: PyError (:PyImport_ImportModule) <type 'exceptions.AttributeError'>
AttributeError("'module' object has no attribute 'new_figure_manager'",)
  File "/home/ufechner/.julia/v0.4/Conda/deps/usr/lib/python2.7/site-packages/matplotlib/pyplot.py", line 114, in <module>
    _backend_mod, new_figure_manager, draw_if_interactive, _show = pylab_setup()
  File "/home/ufechner/.julia/v0.4/Conda/deps/usr/lib/python2.7/site-packages/matplotlib/backends/__init__.py", line 35, in pylab_setup
    new_figure_manager = backend_mod.new_figure_manager

 [inlined code] from /home/ufechner/.julia/v0.4/PyCall/src/exception.jl:81
 in pyimport at /home/ufechner/.julia/v0.4/PyCall/src/PyCall.jl:285
 in __init__ at /home/ufechner/.julia/v0.4/PyPlot/src/PyPlot.jl:264
 in _require_from_serialized at loading.jl:84
 in _require_from_serialized at ./loading.jl:109
 in require at ./loading.jl:219
during initialization of module PyPlot

julia> 

I know that it might be difficult to get this right. Is there a way to make PyPlot and QML compatible?

[barche]

Hi,

What is the new_figure_manager? Do you get this error just from the two using lines? If I do the same, I get no error.

[ufechner7]

If I use another backend then QT for PyPlot everything works fine. This works:

using PyCall
pygui(:wx)
using PyPlot

This doesn't work with QML:

using PyCall
pygui(:qt)
using PyPlot

While importing still works, plotting crashes with the following error:

ERROR: ReadOnlyMemoryError()
 [inlined code] from /home/ufechner/.julia/v0.4/PyCall/src/exception.jl:78
 in pycall at /home/ufechner/.julia/v0.4/PyCall/src/PyCall.jl:344
 in figure at /home/ufechner/.julia/v0.4/PyPlot/src/PyPlot.jl:442
 in plot_costs_per_watt at /mnt/ssd/ufechner/00PythonSoftware/FastSim/Plotting.jl:211
 in plot_costs_per_watt at /mnt/ssd/ufechner/00PythonSoftware/FastSim/Plotting.jl:210
 in plot_diagrams at /mnt/ssd/ufechner/00PythonSoftware/FastSim/Plotting.jl:259
signal (11): Speicherzugriffsfehler
PyObject_Call at -------src-dir-------/Python-2.7.11/Objects/abstract.c:2544
pycall at /home/ufechner/.julia/v0.4/PyCall/src/exception.jl:78
doevent at /home/ufechner/.julia/v0.4/PyCall/src/gui.jl:102
jl_apply_generic at /usr/bin/../lib/x86_64-linux-gnu/julia/libjulia.so (unknown line)
anonymous at stream.jl:693
unknown function (ip: 0x7fdecc72646a)
unknown function (ip: (nil))
Speicherzugriffsfehler (Speicherabzug geschrieben)
ufechner@uwe-desktop64:~$ 

There should be a way to make sure, that only one QT event loop is used. But I have a work-around for now.

[barche]

There is an example using PyPlot now, so I'm closing this.