如何为Pyjulia 0.5.2添加处理器（addprocs），并将Julia函数的值返回给Python？

在Python中调用Julia函数时，有人知道如何为Pyjulia添加处理器吗？我需要使用Python调用一个使用多核的Julia函数，并将值返回给Python

Python代码，

testJulia\u addproc.py

：

import julia
j = julia.Julia()
print("Core number = {}".format(j.nprocs()))
j.include("test_addproc.jl")
a = j.eval("test_addproc()")
print a

Julia代码

测试\u addproc.jl

：

function test_addproc()
    println("line 1")
    np = nprocs()
    println("line 2")
    if np < 12
        println("line 3")
        addprocs(12-np)
        println("line 4")
    end
    println("line 5")
    return(1+1)
end

基于，我发现pyjulia中的处理器数量需要与Julia中的处理器数量匹配（@Isaiah:

nprocs（）

纯Julia中的处理器数量必须匹配

j.nprocs（）

）

我试图在pyjulia中添加proc

import julia
j = julia.Julia()
j.addprocs(2)

出现错误：

ERROR (unhandled task failure): could not spawn setenv(`/anaconda/lib/python2.7/site-packages/julia-0.1.1-py2.7.egg/julia/../fake-julia/julia -Ccore2 -J/Applications/Julia-0.5.app/Contents/Resources/julia/lib/julia/sys.dylib --compile=yes --depwarn=yes --bind-to 127.0.0.1 --worker 8WpA7O0EArLzXh25`; dir="/Applications/Julia-0.5.app/Contents/Resources/julia/bin"): no such file or directory (ENOENT)
 in _jl_spawn(::String, ::Array{String,1}, ::Ptr{Void}, ::Base.Process, ::Base.DevNullStream, ::Base.PipeEndpoint, ::Base.TTY) at ./process.jl:321
 in #424 at ./process.jl:478 [inlined]
 in setup_stdio(::Base.##424#425{Cmd,Ptr{Void},Base.Process}, ::Tuple{Base.DevNullStream,Pipe,Base.TTY}) at ./process.jl:466
 in #spawn#423(::Nullable{Base.ProcessChain}, ::Function, ::Cmd, ::Tuple{Base.DevNullStream,Pipe,Base.TTY}, ::Bool, ::Bool) at ./process.jl:477
 in (::Base.#kw##spawn)(::Array{Any,1}, ::Base.#spawn, ::Cmd, ::Tuple{Base.DevNullStream,Pipe,Base.TTY}, ::Bool, ::Bool) at ./<missing>:0
 in #spawn#420(::Nullable{Base.ProcessChain}, ::Function, ::Base.CmdRedirect, ::Tuple{Base.DevNullStream,Pipe,Base.TTY}, ::Bool, ::Bool) at ./process.jl:359
 in (::Base.#kw##spawn)(::Array{Any,1}, ::Base.#spawn, ::Base.CmdRedirect, ::Tuple{Base.DevNullStream,Pipe,Base.TTY}, ::Bool, ::Bool) at ./<missing>:0
 in open(::Base.CmdRedirect, ::String, ::Base.DevNullStream) at ./process.jl:539
 in launch(::Base.LocalManager, ::Dict{Any,Any}, ::Array{WorkerConfig,1}, ::Condition) at ./managers.jl:318
 in (::Base.##666#670{Base.LocalManager,Dict{Any,Any},Array{WorkerConfig,1},Condition})() at ./event.jl:68
---------------------------------------------------------------------------
RuntimeError                              Traceback (most recent call last)
<ipython-input-3-bfa063d91dec> in <module>()
----> 1 j.addprocs(2)

RuntimeError: Julia exception: could not spawn setenv(`/anaconda/lib/python2.7/site-packages/julia-0.1.1-py2.7.egg/julia/../fake-julia/julia -Ccore2 -J/Applications/Julia-0.5.app/Contents/Resources/julia/lib/julia/sys.dylib --compile=yes --depwarn=yes --bind-to 127.0.0.1 --worker 8WpA7O0EArLzXh25`; dir="/Applications/Julia-0.5.app/Contents/Resources/julia/bin"): no such file or directory (ENOENT)

我的MacPro版本是OS X Yosemite 10.10.5
我的Python版本是

Python 2.7.12:：Anaconda 4.2.0（x86_64）

我的朱莉娅版本是

Julia Version 0.5.2
Commit f4c6c9d4bb (2017-05-06 16:34 UTC)
Platform Info:
  OS: macOS (x86_64-apple-darwin13.4.0)
  CPU: Intel(R) Xeon(R) CPU E5-1650 v2 @ 3.50GHz
  WORD_SIZE: 64
  BLAS: libopenblas (USE64BITINT DYNAMIC_ARCH NO_AFFINITY Sandybridge)
  LAPACK: libopenblas64_
  LIBM: libopenlibm
  LLVM: libLLVM-3.7.1 (ORCJIT, ivybridge)

---

欢迎提出任何建议或想法。谢谢。

第一条错误消息说

错误（未处理的任务失败）：无法生成setenv（`/anaconda/lib/python2.7/site packages/julia-0.1.1-py2.7.egg/julia/。/fake julia/julia-Ccore2-J/Applications/julia-0.5.app/Contents/Resources/julia/lib/julia/sys.dylib--compile=yes--depwarn=yes------绑定到127.0.0.0.0.1--worker pjvta5wbhfb7vs`；dir=“/Users/chlin/Dropbox/Projects/StackOverflow”）：没有这样的文件或目录（enoint）

我发现python包文件夹中没有

目录。

因此，我将
伪julia
目录复制到
/anaconda/lib/python2.7/site packages/julia-0.1.1-py2.7.egg/
中。

现在，我可以通过
j.addprocs（1）
添加处理器，并从
testJulia\u addproc.py
获得结果
2

到目前为止，这是一种解决方法。

我还在PyJulia GitHub上发布问题，希望在将来的版本中修复它

# One way to add procs in pyjulia
import ctypes
JLPATH=b"/Applications/Julia-0.5.app/Contents/Resources/julia"
jl = ctypes.PyDLL(JLPATH+b"/lib/libjulia.dylib", ctypes.RTLD_GLOBAL)
jl.jl_init(JLPATH+b"/bin/")
jl.jl_eval_string(" include(test_addproc.jl) ")
a = jl.jl_eval_string(" test_addproc()) ")
print a
# 0
# It should be 2

Julia Version 0.5.2
Commit f4c6c9d4bb (2017-05-06 16:34 UTC)
Platform Info:
  OS: macOS (x86_64-apple-darwin13.4.0)
  CPU: Intel(R) Xeon(R) CPU E5-1650 v2 @ 3.50GHz
  WORD_SIZE: 64
  BLAS: libopenblas (USE64BITINT DYNAMIC_ARCH NO_AFFINITY Sandybridge)
  LAPACK: libopenblas64_
  LIBM: libopenlibm
  LLVM: libLLVM-3.7.1 (ORCJIT, ivybridge)