PyPlot needs to be reinstalled after Julia is interrupted

[mancolric]

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Hello,

I have Julia 1.2.0 installed with Plots. For installing PyPlot backend without manually installing Python, I followed the instructions in https://github.com/JuliaPy/PyPlot.jl and did:

ENV["PYTHON"]="" Pkg.build("PyCall") Pkg.add("PyPlot") using Plots pyplot()

Then, everything went fine. However, if I interrupt Julia (not with Ctrl+C, but, e.g., when the light suddenly turns off and the computer suddenly shuts down), when I execute Julia again, I receive the following message:

error compiling __init__: could not load library "/tmp/lib/libpython3.7m.so.1.0" /tmp/lib/libpython3.7m.so.1.0: cannot open shared object file: No such file or directory

and I have to reinstall PyPlot with the commands above.

I have the same problem in two computers (one uses Debian Stretch, the other uses Ubuntu).