`using PyPlot` fails

[crbinz]

On Windows 7, julia 1.1.0:

julia> using PyPlot
[ Info: Installing matplotlib via the Conda matplotlib package...
[ Info: Running `conda install -y matplotlib` in root environment
Collecting package metadata: done
Solving environment: done

# All requested packages already installed.

ERROR: InitError: PyError (PyImport_ImportModule) <class 'AttributeError'>
AttributeError("module 'numpy' has no attribute '__version__'",)
  File "C:\Users\cbinz\.julia\conda\3\lib\site-packages\matplotlib\__init__.py", line 210, in <module>
    if not compare_versions(numpy.__version__, __version__numpy__):

Stacktrace:
 [1] pyimport(::String) at C:\Users\cbinz\.julia\packages\PyCall\RQjD7\src\PyCall.jl:537
 [2] pyimport_conda(::String, ::String, ::String) at C:\Users\cbinz\.julia\packages\PyCall\RQjD7\src\PyCall.jl:701
 [3] pyimport_conda at C:\Users\cbinz\.julia\packages\PyCall\RQjD7\src\PyCall.jl:694 [inlined]
 [4] __init__() at C:\Users\cbinz\.julia\packages\PyPlot\KRYZs\src\init.jl:167
 [5] _include_from_serialized(::String, ::Array{Any,1}) at .\loading.jl:633
 [6] _require_search_from_serialized(::Base.PkgId, ::String) at .\loading.jl:713
 [7] _require(::Base.PkgId) at .\loading.jl:937
 [8] require(::Base.PkgId) at .\loading.jl:858
 [9] require(::Module, ::Symbol) at .\loading.jl:853
during initialization of module PyPlot

This is after I do ENV["PYTHON"]=""; Pkg.build("PyCall") and ]add PyPlot, both of which complete successfully.

[stevengj]

module 'numpy' has no attribute '__version__'

I haven't seen that error before. Note that the error occurs inside matplotlib. This would seem to indicate that your Python installation is broken somehow.

Maybe it will help to update the conda installation (do add Conda at the package prompt first):

using Conda
Conda.update()

?

If not, you could try removing Conda and reinstalling

rm(raw"C:\Users\cbinz\.julia\conda", recursive=true)

and then re-run build PyCall at the package prompt.

[crbinz]

Updating Conda didn't fix things, but nuking ~/.julia/conda did. :man_shrugging: