TkAgg backend on macOS aborts

[tkf]

It seems that there are problems using TkAgg in macOS:
#405
#399
#253 (comment)
https://discourse.julialang.org/t/pyplot-installation-error-related-to-libpython3-7m-dylib-and-libsystem-kernel-dylib/17649

Upstream issues:
matplotlib/matplotlib#7743
https://sourceforge.net/p/tktoolkit/bugs/3082/

How about removing :tk from the list of GUIs to try in macOS? Or maybe move it to the end?

PyPlot.jl/src/init.jl

Lines 50 to 60 in daadae4

	function find_backend(matplotlib::PyObject)
	gui2matplotlib = Dict(:wx=>"WXAgg",:gtk=>"GTKAgg",:gtk3=>"GTK3Agg",
	:qt_pyqt4=>"Qt4Agg", :qt_pyqt5=>"Qt5Agg",
	:qt_pyside=>"Qt4Agg", :qt4=>"Qt4Agg",
	:qt5=>"Qt5Agg", :qt=>"Qt4Agg",:tk=>"TkAgg")
	conda = PyCall.conda || !isempty(PyCall.anaconda_conda())
	if Compat.Sys.islinux()
	guis = [:tk, :gtk3, :gtk, :qt5, :qt4, :wx]
	else
	guis = [:tk, :qt5, :qt4, :wx, :gtk, :gtk3]
	end

I also suggest to install pyqt in build.jl using JuliaPy/PyCall.jl#613

[stevengj]

Is this still an issue? On my MacOS machine with Conda PyPlot defaults to qt5 already

[tkf]

Reading the conda recipe it still looks like matplotlib does not install pyqt by default? https://github.com/AnacondaRecipes/matplotlib-feedstock/blob/f5ecb6832741888ab853ac92345d9fc4124de5d0/recipe/meta.yaml#L56

Also, the fact that :tk comes before :qt5 means that this problem would pops up once tk is installed via some other dependencies.

But I don't have macOS so I can't check the situation myself. So, if you (or other macOS users) think it's already fixed then I don't have any reasons to stop closing this issue.

[stevengj]

Changed to put tk last since this seems to still be an issue.

[stevengj]

This seems to be fine these days, at least with the Conda tkinter package which is nowadays the default on MacOS.

See 52ff225