如何解决可能来自PyPlot的Juno命令提示"LoadError: PyPlot load library compiling error“？

Question

当我尝试在Julia命令提示符中编译Julia文件时，如下所示：

julia> include("file.jl")

它向我显示了这个错误，我无法理解它：

[ Info: Precompiling PyPlot [d330b81b-6aea-500a-939a-2ce795aea3ee]
ERROR: LoadError: LoadError: could not load library "/usr/lib/x86_64-linux-gnu/libpython3.6m.so.1.0"
/usr/lib/x86_64-linux-gnu/libpython3.6m.so.1.0: wrong ELF class: ELFCLASS64
Stacktrace:
[1] dlopen(::String, ::UInt32) at /buildworker/worker/package_linux32/build/usr/share/julia/stdlib/v1.0/Libdl/src/Libdl.jl:97
 [2] top-level scope at /home/toto/.julia/packages/PyCall/zqDXB/src/startup.jl:47 [inlined]
 [3] top-level scope at ./none:0
 [4] include at ./boot.jl:317 [inlined]
 [5] include_relative(::Module, ::String) at ./loading.jl:1044
 [6] include at ./sysimg.jl:29 [inlined]
 [7] include(::String) at /home/toto/.julia/packages/PyCall/zqDXB/src/PyCall.jl:1
 [8] top-level scope at none:0
 [9] include at ./boot.jl:317 [inlined]
 [10] include_relative(::Module, ::String) at ./loading.jl:1044
 [11] include(::Module, ::String) at ./sysimg.jl:29
 [12] top-level scope at none:2
 [13] eval at ./boot.jl:319 [inlined]
 [14] eval(::Expr) at ./client.jl:393
 [15] top-level scope at ./none:3
in expression starting at /home/toto/.julia/packages/PyCall/zqDXB/src/startup.jl:41
in expression starting at /home/toto/.julia/packages/PyCall/zqDXB/src/PyCall.jl:34
ERROR: LoadError: Failed to precompile PyCall [438e738f-606a-5dbb-bf0a-cddfbfd45ab0] to /home/toto/.julia/compiled/v1.0/PyCall/GkzkC.ji.
Stacktrace:
 [1] error(::String) at ./error.jl:33
 [2] compilecache(::Base.PkgId, ::String) at ./loading.jl:1203
 [3] _require(::Base.PkgId) at ./loading.jl:960
 [4] require(::Base.PkgId) at ./loading.jl:858
 [5] require(::Module, ::Symbol) at ./loading.jl:853
 [6] include at ./boot.jl:317 [inlined]
 [7] include_relative(::Module, ::String) at ./loading.jl:1044
 [8] include(::Module, ::String) at ./sysimg.jl:29
 [9] top-level scope at none:2
 [10] eval at ./boot.jl:319 [inlined]
 [11] eval(::Expr) at ./client.jl:393
 [12] top-level scope at ./none:3
in expression starting at /home/toto/.julia/packages/PyPlot/XHEG0/src/PyPlot.jl:4
ERROR: LoadError: LoadError: LoadError: Failed to precompile PyPlot [d330b81b-6aea-500a-939a-2ce795aea3ee] to /home/toto/.julia/compiled/v1.0/PyPlot/oatAj.ji.
Stacktrace:
 [1] error(::String) at ./error.jl:33
 [2] compilecache(::Base.PkgId, ::String) at ./loading.jl:1203
 [3] _require(::Base.PkgId) at ./loading.jl:960
 [4] require(::Base.PkgId) at ./loading.jl:858
 [5] require(::Module, ::Symbol) at ./loading.jl:853
 [6] include at ./boot.jl:317 [inlined]
 [7] include_relative(::Module, ::String) at ./loading.jl:1044
 [8] include(::Module, ::String) at ./sysimg.jl:29
 [9] include(::String) at ./client.jl:392
 [10] top-level scope at none:0
 [11] include at ./boot.jl:317 [inlined]
 [12] include_relative(::Module, ::String) at ./loading.jl:1044
 [13] include(::Module, ::String) at ./sysimg.jl:29
 [14] include(::String) at ./client.jl:392
 [15] top-level scope at none:0
 [16] include at ./boot.jl:317 [inlined]
 [17] include_relative(::Module, ::String) at ./loading.jl:1044
 [18] include(::Module, ::String) at ./sysimg.jl:29
 [19] include(::String) at ./client.jl:392
 [20] top-level scope at none:0
in expression starting at /home/toto/project/code/julia/file3.jl:1
in expression starting at /home/toto/project/code/julia/file2.jl:2
in expression starting at /home/toto/project/code/julia/file.jl:1

我该如何解决这个问题？我注意到我已经安装了PyPlot：

julia> import Pkg; Pkg.add("PyPlot")
 Resolving package versions...
  Updating `~/.julia/environments/v1.0/Project.toml`
 [no changes]
  Updating `~/.julia/environments/v1.0/Manifest.toml`
 [no changes]

我还注意到，我在使用Juno的第二个Julia命令窗口中得到了这个错误，因为Juno的标准REPL正忙于运行一些其他代码。REPL中的其他代码还包括我的“有问题的”文件file.jl, file2.jl和file3.jl，并且在那里运行得很好。

Answer 1

当我试图通过点击菜单栏Juno -> Open External REPL而不是我最初的Juno -> New Terminal -> Current File's Folder来打开第二个REPL时，这个问题自己解决了。