I am hoping to use PyPlot functions in a module MyTest. I create the MyTest project/package, add PyCall, PyPlot, and Conda to MyTest’s Project.toml, and compare what happens when I try using the module vs using PyPlot in REPL.
(v1.1) pkg> generate MyTest
Generating project MyTest:
MyTest/Project.toml
MyTest/src/MyTest.jl
(v1.1) pkg> activate MyTest
(MyTest) pkg> add PyPlot PyCall Conda
Updating registry at `~/.julia/registries/General`
Updating git-repo `https://github.com/JuliaRegistries/General.git`
Resolving package versions...
Updating `/USER/Desktop/MyTest/Project.toml`
[438e738f] + PyCall v1.18.5
[d330b81b] + PyPlot v2.7.0
[8f4d0f93] + Conda v1.2.0
Updating `/USER/Desktop/MyTest/Manifest.toml`
[3da002f7] + ColorTypes v0.7.5
[5ae59095] + Colors v0.9.5
[34da2185] + Compat v1.5.1
[8f4d0f93] + Conda v1.2.0
[53c48c17] + FixedPointNumbers v0.5.3
[682c06a0] + JSON v0.20.0
[b964fa9f] + LaTeXStrings v1.0.3
[1914dd2f] + MacroTools v0.4.5
[438e738f] + PyCall v1.18.5
[d330b81b] + PyPlot v2.7.0
[189a3867] + Reexport v0.2.0
[81def892] + VersionParsing v1.1.3
[2a0f44e3] + Base64
[ade2ca70] + Dates
[8bb1440f] + DelimitedFiles
[8ba89e20] + Distributed
[b77e0a4c] + InteractiveUtils
[76f85450] + LibGit2
[8f399da3] + Libdl
[37e2e46d] + LinearAlgebra
[56ddb016] + Logging
[d6f4376e] + Markdown
[a63ad114] + Mmap
[44cfe95a] + Pkg
[de0858da] + Printf
[3fa0cd96] + REPL
[9a3f8284] + Random
[ea8e919c] + SHA
[9e88b42a] + Serialization
[1a1011a3] + SharedArrays
[6462fe0b] + Sockets
[2f01184e] + SparseArrays
[10745b16] + Statistics
[8dfed614] + Test
[cf7118a7] + UUIDs
[4ec0a83e] + Unicode
Then from REPL I try
-
using PyPlot; this works fine -
using MyTest; (whereJULIA_LOAD_PATHhas been updated to includepath_to_/MyTest/src/)
In the below, (1) works fine, but (2) gives the following error:
julia> using PyPlot
julia> using MyTest
[ Info: Precompiling MyTest [top-level]
┌ Warning: No working GUI backend found for matplotlib
└ @ PyPlot ~/.julia/packages/PyPlot/mQXSC/src/init.jl:160
ERROR: LoadError: InitError: PyError (PyImport_ImportModule
The Python package matplotlib.pyplot could not be found by pyimport. Usually this means
that you did not install matplotlib.pyplot in the Python version being used by PyCall.
PyCall is currently configured to use the Julia-specific Python distribution
installed by the Conda.jl package. To install the matplotlib.pyplot module, you can
use `pyimport_conda("matplotlib.pyplot", PKG)`, where PKG is the Anaconda
package the contains the module matplotlib.pyplot, or alternatively you can use the
Conda package directly (via `using Conda` followed by `Conda.add` etcetera).
Alternatively, if you want to use a different Python distribution on your
system, such as a system-wide Python (as opposed to the Julia-specific Python),
you can re-configure PyCall with that Python. As explained in the PyCall
documentation, set ENV["PYTHON"] to the path/name of the python executable
you want to use, run Pkg.build("PyCall"), and re-launch Julia.
) <class 'ImportError'>
ImportError("/lib/x86_64-linux-gnu/libz.so.1: version `ZLIB_1.2.9' not found (required by /USER/.julia/conda/3/lib/python3.7/site-packages/matplotlib/../../.././libpng16.so.16)")
File "/USER/.julia/conda/3/lib/python3.7/site-packages/matplotlib/pyplot.py", line 32, in <module>
import matplotlib.colorbar
File "/USER/.julia/conda/3/lib/python3.7/site-packages/matplotlib/colorbar.py", line 32, in <module>
import matplotlib.contour as contour
File "/homes/jmroth/.julia/conda/3/lib/python3.7/site-packages/matplotlib/contour.py", line 18, in <module>
import matplotlib.font_manager as font_manager
File "/USER/.julia/conda/3/lib/python3.7/site-packages/matplotlib/font_manager.py", line 48, in <module>
from matplotlib import afm, cbook, ft2font, rcParams, get_cachedir
Do I have to somehow adjust the ENV["PYTHONPATH"] in MyTest? I think I previously did that for REPL, but I’m confused about why it works from REPL and not inside my module.