This is depressing... Installing a new matplotlib did not fix the problem
at all. After I exited and restarted Julia the old error came right back,
even with the new Python install:
------------------
Orion ~ % julia
_
_ _ _(_)_ | A fresh approach to technical computing
(_) | (_) (_) | Documentation: http://docs.julialang.org
_ _ _| |_ __ _ | Type "?help" for help.
| | | | | | |/ _` | |
| | |_| | | | (_| | | Version 0.5.0 (2016-09-19 18:14 UTC)
_/ |\__'_|_|_|\__'_| | Official http://julialang.org/ release
|__/ | x86_64-pc-linux-gnu
julia> using PyPlot
/home/daniel/.julia/v0.5/Conda/deps/usr/lib/python2.7/site-packages/matplotlib/font_manager.py:273:
UserWarning: Matplotlib is building the font cache using fc-list. This may
take a moment.
warnings.warn('Matplotlib is building the font cache using fc-list. This
may take a moment.')
WARNING: No working GUI backend found for matplotlib.
/home/daniel/.julia/v0.5/Conda/deps/usr/lib/python2.7/site-packages/matplotlib/__init__.py:1357:
UserWarning: This call to matplotlib.use() has no effect
because the backend has already been chosen;
matplotlib.use() must be called *before* pylab, matplotlib.pyplot,
or matplotlib.backends is imported for the first time.
warnings.warn(_use_error_msg)
/home/daniel/.julia/v0.5/Conda/deps/usr/lib/python2.7/site-packages/matplotlib/font_manager.py:273:
UserWarning: Matplotlib is building the font cache using fc-list. This may
take a moment.
warnings.warn('Matplotlib is building the font cache using fc-list. This
may take a moment.')
ERROR: InitError: PyError (:PyImport_ImportModule) <type
'exceptions.IOError'>
IOError(13, 'Permission denied')
File
"/home/daniel/.julia/v0.5/Conda/deps/usr/lib/python2.7/site-packages/matplotlib/pyplot.py",
line 29, in <module>
import matplotlib.colorbar
File
"/home/daniel/.julia/v0.5/Conda/deps/usr/lib/python2.7/site-packages/matplotlib/colorbar.py",
line 34, in <module>
import matplotlib.collections as collections
File
"/home/daniel/.julia/v0.5/Conda/deps/usr/lib/python2.7/site-packages/matplotlib/collections.py",
line 27, in <module>
import matplotlib.backend_bases as backend_bases
File
"/home/daniel/.julia/v0.5/Conda/deps/usr/lib/python2.7/site-packages/matplotlib/backend_bases.py",
line 62, in <module>
import matplotlib.textpath as textpath
File
"/home/daniel/.julia/v0.5/Conda/deps/usr/lib/python2.7/site-packages/matplotlib/textpath.py",
line 15, in <module>
import matplotlib.font_manager as font_manager
File
"/home/daniel/.julia/v0.5/Conda/deps/usr/lib/python2.7/site-packages/matplotlib/font_manager.py",
line 1421, in <module>
_rebuild()
File
"/home/daniel/.julia/v0.5/Conda/deps/usr/lib/python2.7/site-packages/matplotlib/font_manager.py",
line 1406, in _rebuild
fontManager = FontManager()
File
"/home/daniel/.julia/v0.5/Conda/deps/usr/lib/python2.7/site-packages/matplotlib/font_manager.py",
line 1059, in __init__
self.ttflist = createFontList(self.ttffiles)
File
"/home/daniel/.julia/v0.5/Conda/deps/usr/lib/python2.7/site-packages/matplotlib/font_manager.py",
line 581, in createFontList
font = ft2font.FT2Font(fpath)
in pyerr_check at /home/daniel/.julia/v0.5/PyCall/src/exception.jl:56
[inlined]
in pyerr_check at /home/daniel/.julia/v0.5/PyCall/src/exception.jl:61
[inlined]
in macro expansion at /home/daniel/.julia/v0.5/PyCall/src/exception.jl:81
[inlined]
in pyimport(::String) at /home/daniel/.julia/v0.5/PyCall/src/PyCall.jl:387
in __init__() at /home/daniel/.julia/v0.5/PyPlot/src/PyPlot.jl:235
in _include_from_serialized(::String) at ./loading.jl:150
in _require_from_serialized(::Int64, ::Symbol, ::String, ::Bool) at
./loading.jl:187
in _require_search_from_serialized(::Int64, ::Symbol, ::String, ::Bool) at
./loading.jl:217
in require(::Symbol) at ./loading.jl:371
during initialization of module PyPlot
------------------
Notice that it's now looking at my brand-new locally installed Python in
~/.julia/v0.5/Conda/deps
What's perhaps more surprising is that I still see an IO error and a
"Permission denied". How is that possible? I'm pretty sure I never typed
"sudo" when I did any of this. Incidentally, I already tried removing the
~/.cache directory and it didn't help.
Cheers,
Daniel.
On Wednesday, 2 November 2016 16:16:33 UTC+1, Daniel Carrera wrote:
>
> Thanks! Ok... getting close, but not quite there:
>
> Deleting ~/.cache/matplotlib and even ~/.cache/fontconfig didn't work for
> me, but I figured out how to use Conda.jl to install matplotlib separately.
> So I did this:
>
> $ sudo apt-get remove python-matplotlib
> $ julia
>
> julia> Pkg.add("Conda")
> julia> using Conda
> julia> Conda.add("matplotlib")
> julia> ENV["PYTHON"] = "/home/daniel/.julia/v0.5/Conda/deps/usr/bin/python"
> julia> Pkg.add("PyPlot")
> julia> using PyPlot
>
> Up to this point there are no errors! But this is what happens next:
>
> julia> plot( [1,2,3], [4,5,6] )
> ERROR: ArgumentError: haskey of NULL PyObject
> in haskey(::PyCall.PyObject, ::String) at
> /home/daniel/.julia/v0.5/PyCall/src/PyCall.jl:282
> in #plot#85(::Array{Any,1}, ::Function, ::Array{Int64,1},
> ::Vararg{Array{Int64,1},N}) at
> /home/daniel/.julia/v0.5/PyPlot/src/PyPlot.jl:396
> in plot(::Array{Int64,1}, ::Vararg{Array{Int64,1},N}) at
> /home/daniel/.julia/v0.5/PyPlot/src/PyPlot.jl:396
>
>
> I partially understand the error. I'll experiment a bit more to see if I
> can resolve it, but I thought you'd like to know about it.
>
> Cheers,
> Daniel.
>
>
>
>
> so I think I'll switch to Conda Python. I figured out how to use Conda.jl
> to get a separate matplotlib install
>
>
> On Wednesday, 2 November 2016 15:29:31 UTC+1, Steven G. Johnson wrote:
>>
>> For the font-cache, see
>> https://github.com/matplotlib/matplotlib/issues/5836
>> ...there is some ~/.cache/matplotlib directory that you can delete to get
>> rid of this.
>>
>> To tell PyPlot to use the Conda Python, you need to set the PYTHON
>> environment variable and re-build PyCall:
>>
>> ENV["PYTHON"]=""
>> Pkg.build("PyCall")
>>
>
