# PyCall not properly installed

**URL:** <https://discourse.julialang.org/t/pycall-not-properly-installed/39928>\
**Category:** New to Julia\
**Tags:** pycall\
**Created:** [May 22, 2020, 2:22am UTC](https://discourse.julialang.org/t/pycall-not-properly-installed/39928 "2020-05-22T02:22:22Z")\
**Posts on this page:** 7\
**Page:** 1

<div class="post-metadata">

**Author:** ![SambitMishra98](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/sambitmishra98/32/14263_2.png) [@SambitMishra98](https://discourse.julialang.org/u/SambitMishra98)\
**Post date:** [May 22, 2020, 2:22am UTC](https://discourse.julialang.org/t/pycall-not-properly-installed/39928/1 "2020-05-22T02:22:22Z")

</div>

I am not able to use any package which has some connection with the PyCall package. I tried following the instructions in one of the cases (for using ScikitLearn package) and have given the output below. I tried resolving the error by following online resolved issues and felt like I am making it worse. Please help me fix this issue. I am using Julia v1.4.1 in Ubuntu 20.04 WSL.

```julia
using ScikitLearn
┌ Info: Precompiling ScikitLearn [3646fa90-6ef7-5e7e-9f22-8aca16db6324]
└ @ Base loading.jl:1260
ERROR: LoadError: LoadError: PyCall not properly installed. Please run Pkg.build("PyCall")
Stacktrace:
 [1] error(::String) at ./error.jl:33
 [2] top-level scope at /home/sambit98/.juliapro/JuliaPro_v1.4.1-1/packages/PyCall/zqDXB/src/startup.jl:44
 [3] include(::Module, ::String) at ./Base.jl:377
 [4] include(::String) at /home/sambit98/.juliapro/JuliaPro_v1.4.1-1/packages/PyCall/zqDXB/src/PyCall.jl:1
 [5] top-level scope at /home/sambit98/.juliapro/JuliaPro_v1.4.1-1/packages/PyCall/zqDXB/src/PyCall.jl:34
 [6] include(::Module, ::String) at ./Base.jl:377
 [7] top-level scope at none:2
 [8] eval at ./boot.jl:331 [inlined]
 [9] eval(::Expr) at ./client.jl:449
 [10] top-level scope at ./none:3
in expression starting at /home/sambit98/.juliapro/JuliaPro_v1.4.1-1/packages/PyCall/zqDXB/src/startup.jl:41
in expression starting at /home/sambit98/.juliapro/JuliaPro_v1.4.1-1/packages/PyCall/zqDXB/src/PyCall.jl:34
ERROR: LoadError: LoadError: Failed to precompile PyCall [438e738f-606a-5dbb-bf0a-cddfbfd45ab0] to /home/sambit98/.juliapro/JuliaPro_v1.4.1-1/compiled/v1.4/PyCall/GkzkC_XmPoC.ji.
Stacktrace:
 [1] error(::String) at ./error.jl:33
 [2] compilecache(::Base.PkgId, ::String) at ./loading.jl:1272
 [3] _require(::Base.PkgId) at ./loading.jl:1029
 [4] require(::Base.PkgId) at ./loading.jl:927
 [5] require(::Module, ::Symbol) at ./loading.jl:922
 [6] include(::Module, ::String) at ./Base.jl:377
 [7] include(::String) at /home/sambit98/.juliapro/JuliaPro_v1.4.1-1/packages/ScikitLearn/bo2Pt/src/ScikitLearn.jl:10
 [8] top-level scope at /home/sambit98/.juliapro/JuliaPro_v1.4.1-1/packages/ScikitLearn/bo2Pt/src/ScikitLearn.jl:12
 [9] include(::Module, ::String) at ./Base.jl:377
 [10] top-level scope at none:2
 [11] eval at ./boot.jl:331 [inlined]
 [12] eval(::Expr) at ./client.jl:449
 [13] top-level scope at ./none:3
in expression starting at /home/sambit98/.juliapro/JuliaPro_v1.4.1-1/packages/ScikitLearn/bo2Pt/src/Skcore.jl:11
in expression starting at /home/sambit98/.juliapro/JuliaPro_v1.4.1-1/packages/ScikitLearn/bo2Pt/src/ScikitLearn.jl:12
Failed to precompile ScikitLearn [3646fa90-6ef7-5e7e-9f22-8aca16db6324] to /home/sambit98/.juliapro/JuliaPro_v1.4.1-1/compiled/v1.4/ScikitLearn/tbUuI_XmPoC.ji.

Stacktrace:
 [1] error(::String) at ./error.jl:33
 [2] compilecache(::Base.PkgId, ::String) at ./loading.jl:1272
 [3] _require(::Base.PkgId) at ./loading.jl:1029
 [4] require(::Base.PkgId) at ./loading.jl:927
 [5] require(::Module, ::Symbol) at ./loading.jl:922
 [6] top-level scope at In[1]:1

1
Pkg.build("PyCall")
   Building Conda ─→ `~/.juliapro/JuliaPro_v1.4.1-1/packages/Conda/3rPhK/deps/build.log`
┌ Error: Error building `Conda`: 
│ ERROR: LoadError: ArgumentError: Package Pkg not found in current path:
│ - Run `import Pkg; Pkg.add("Pkg")` to install the Pkg package.
│ 
│ Stacktrace:
│ [1] require(::Module, ::Symbol) at ./loading.jl:892
│ [2] include(::Module, ::String) at ./Base.jl:377
│ [3] load_julia_startup() at ./client.jl:316
│ [4] exec_options(::Base.JLOptions) at ./client.jl:259
│ [5] _start() at ./client.jl:484
│ in expression starting at /mnt/d/SAMBIT/JULIA/JuliaInstallation/JuliaPro-1.4.1-1/Julia/etc/julia/startup.jl:5
└ @ Pkg.Operations /home/buildbot/build-worker/worker/juliapro-release-centos7-0_6/build/tmp_julia/share/julia/stdlib/v1.4/Pkg/src/Operations.jl:892
   Building PyCall → `~/.juliapro/JuliaPro_v1.4.1-1/packages/PyCall/zqDXB/deps/build.log`
┌ Error: Error building `PyCall`: 
│ ERROR: LoadError: ArgumentError: Package Pkg not found in current path:
│ - Run `import Pkg; Pkg.add("Pkg")` to install the Pkg package.
│ 
│ Stacktrace:
│ [1] require(::Module, ::Symbol) at ./loading.jl:892
│ [2] include(::Module, ::String) at ./Base.jl:377
│ [3] load_julia_startup() at ./client.jl:316
│ [4] exec_options(::Base.JLOptions) at ./client.jl:259
│ [5] _start() at ./client.jl:484
│ in expression starting at /mnt/d/SAMBIT/JULIA/JuliaInstallation/JuliaPro-1.4.1-1/Julia/etc/julia/startup.jl:5
└ @ Pkg.Operations /home/buildbot/build-worker/worker/juliapro-release-centos7-0_6/build/tmp_julia/share/julia/stdlib/v1.4/Pkg/src/Operations.jl:892
Pkg
1
import Pkg; Pkg.add("Pkg")
   Updating registry at `~/.juliapro/JuliaPro_v1.4.1-1/registries/JuliaPro`
  Resolving package versions...
   Updating `~/.juliapro/JuliaPro_v1.4.1-1/environments/v1.4/Project.toml`
 [no changes]
   Updating `~/.juliapro/JuliaPro_v1.4.1-1/environments/v1.4/Manifest.toml`
 [no changes]

```

---

<div class="post-metadata">

**Author:** ![anon67531922](https://avatars.discourse-cdn.com/v4/letter/a/48db29/32.png) [@anon67531922](https://discourse.julialang.org/u/anon67531922)\
**Post date:** [May 22, 2020, 2:53am UTC](https://discourse.julialang.org/t/pycall-not-properly-installed/39928/2 "2020-05-22T02:53:35Z")

</div>

I’ve never used `PyCall` or `ScikitLearn`, but it looks like perhaps those error messages have led you a little astray.

You probably don’t want `Pkg` in your Project.toml, so I’d start by undoing the `Pkg.add("Pkg")` step.

I’d just hit the backbrace ‘`]`’ to enter package mode and do

```julia-auto
pkg> rm Pkg

```

For safe, measure, I’d suggest trying:

```julia-auto
pkg> st

```

and see what you have in there. You should have at least `ScikitLearn`.

Your first error message indicates that you need to rebuild `PyCall`. For that, I’d try

```julia-auto
pkg> build PyCall

```

How far does that get you?

### Note:

`Pkg` is a standard library, so unless your package is doing something with `Pkg`, you don’t need to `add` it, but you do need to either `import` it or use the package mode by hitting ‘`]`’ like above.

I usually do the latter when I’m in the REPL so I don’t need to `import Pkg`.

---

<div class="post-metadata">

**Author:** ![SambitMishra98](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/sambitmishra98/32/14263_2.png) [@SambitMishra98](https://discourse.julialang.org/u/SambitMishra98)\
**Post date:** [May 22, 2020, 3:01am UTC](https://discourse.julialang.org/t/pycall-not-properly-installed/39928/3 "2020-05-22T03:01:50Z")

</div>

I got the below output after executing the 3 commands you mentioned. I have `ScikitLearn` in the output of line 2, but the problem still persists, as seen in output of line 3.

```julia
1
]rm Pkg
   Updating `~/.juliapro/JuliaPro_v1.4.1-1/environments/v1.4/Project.toml`
  [44cfe95a] - Pkg 
   Updating `~/.juliapro/JuliaPro_v1.4.1-1/environments/v1.4/Manifest.toml`
 [no changes]
]
1
]st
Status `~/.juliapro/JuliaPro_v1.4.1-1/environments/v1.4/Project.toml`
  [69666777] Arrow v0.2.4
  [c52e3926] Atom v0.12.10 ⚲
  [6e4b80f9] BenchmarkTools v0.5.0
  [8f4d0f93] Conda v1.4.1
  [a93c6f00] DataFrames v0.20.2
  [aaf54ef3] DistributedArrays v0.6.4
  [31c24e10] Distributions v0.23.2
  [becb17da] Feather v0.5.5
  [587475ba] Flux v0.10.4
  [0e44f5e4] Hwloc v1.0.3
  [7073ff75] IJulia v1.21.2
  [a98d9a8b] Interpolations v0.12.9
  [aa1ae85d] JuliaInterpreter v0.7.14
  [e5e0dc1b] Juno v0.8.1 ⚲
  [cc2ba9b6] MLDataUtils v0.5.1
  [872c559c] NNlib v0.6.6
  [4722fa14] PkgAuthentication v0.1.2
  [91a5bcdd] Plots v1.2.2
  [c46f51b8] ProfileView v0.6.5
  [438e738f] PyCall v1.91.4
  [3646fa90] ScikitLearn v0.5.1
  [a759f4b9] TimerOutputs v0.5.5
  [1cfade01] UnicodeFun v0.4.1
  [44d3d7a6] Weave v0.9.4
C
1
]build PyCall
   Building Conda ─→ `~/.juliapro/JuliaPro_v1.4.1-1/packages/Conda/3rPhK/deps/build.log`
┌ Error: Error building `Conda`: 
│ ERROR: LoadError: ArgumentError: Package Pkg not found in current path:
│ - Run `import Pkg; Pkg.add("Pkg")` to install the Pkg package.
│ 
│ Stacktrace:
│ [1] require(::Module, ::Symbol) at ./loading.jl:892
│ [2] include(::Module, ::String) at ./Base.jl:377
│ [3] load_julia_startup() at ./client.jl:316
│ [4] exec_options(::Base.JLOptions) at ./client.jl:259
│ [5] _start() at ./client.jl:484
│ in expression starting at /mnt/d/SAMBIT/JULIA/JuliaInstallation/JuliaPro-1.4.1-1/Julia/etc/julia/startup.jl:5
└ @ Pkg.Operations /home/buildbot/build-worker/worker/juliapro-release-centos7-0_6/build/tmp_julia/share/julia/stdlib/v1.4/Pkg/src/Operations.jl:892
   Building PyCall → `~/.juliapro/JuliaPro_v1.4.1-1/packages/PyCall/zqDXB/deps/build.log`
┌ Error: Error building `PyCall`: 
│ ERROR: LoadError: ArgumentError: Package Pkg not found in current path:
│ - Run `import Pkg; Pkg.add("Pkg")` to install the Pkg package.
│ 
│ Stacktrace:
│ [1] require(::Module, ::Symbol) at ./loading.jl:892
│ [2] include(::Module, ::String) at ./Base.jl:377
│ [3] load_julia_startup() at ./client.jl:316
│ [4] exec_options(::Base.JLOptions) at ./client.jl:259
│ [5] _start() at ./client.jl:484
│ in expression starting at /mnt/d/SAMBIT/JULIA/JuliaInstallation/JuliaPro-1.4.1-1/Julia/etc/julia/startup.jl:5
└ @ Pkg.Operations /home/buildbot/build-worker/worker/juliapro-release-centos7-0_6/build/tmp_julia/share/julia/stdlib/v1.4/Pkg/src/Operations.jl:892

```

---

<div class="post-metadata">

**Author:** ![anon67531922](https://avatars.discourse-cdn.com/v4/letter/a/48db29/32.png) [@anon67531922](https://discourse.julialang.org/u/anon67531922)\
**Post date:** [May 22, 2020, 3:29am UTC](https://discourse.julialang.org/t/pycall-not-properly-installed/39928/4 "2020-05-22T03:29:26Z")

</div>

Ok. Maybe you do need to import `Pkg`. So I’d try,

```julia
julia> import Pkg; Pkg.build("PyCall");

```

How is that?

---

<div class="post-metadata">

**Author:** ![SambitMishra98](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/sambitmishra98/32/14263_2.png) [@SambitMishra98](https://discourse.julialang.org/u/SambitMishra98)\
**Post date:** [May 22, 2020, 4:06am UTC](https://discourse.julialang.org/t/pycall-not-properly-installed/39928/5 "2020-05-22T04:06:48Z")

</div>

> [@anon67531922](#):
>
> `import Pkg; Pkg.build("PyCall");`

I had tried that already. It doesn’t work. The following is the output.

```julia
   Building Conda ─→ `~/.juliapro/JuliaPro_v1.4.1-1/packages/Conda/3rPhK/deps/build.log`
┌ Error: Error building `Conda`: 
│ ERROR: LoadError: ArgumentError: Package Pkg not found in current path:
│ - Run `import Pkg; Pkg.add("Pkg")` to install the Pkg package.
│ 
│ Stacktrace:
│ [1] require(::Module, ::Symbol) at ./loading.jl:892
│ [2] include(::Module, ::String) at ./Base.jl:377
│ [3] load_julia_startup() at ./client.jl:316
│ [4] exec_options(::Base.JLOptions) at ./client.jl:259
│ [5] _start() at ./client.jl:484
│ in expression starting at /mnt/d/SAMBIT/JULIA/JuliaInstallation/JuliaPro-1.4.1-1/Julia/etc/julia/startup.jl:5
└ @ Pkg.Operations /home/buildbot/build-worker/worker/juliapro-release-centos7-0_6/build/tmp_julia/share/julia/stdlib/v1.4/Pkg/src/Operations.jl:892
   Building PyCall → `~/.juliapro/JuliaPro_v1.4.1-1/packages/PyCall/zqDXB/deps/build.log`
┌ Error: Error building `PyCall`: 
│ ERROR: LoadError: ArgumentError: Package Pkg not found in current path:
│ - Run `import Pkg; Pkg.add("Pkg")` to install the Pkg package.
│ 
│ Stacktrace:
│ [1] require(::Module, ::Symbol) at ./loading.jl:892
│ [2] include(::Module, ::String) at ./Base.jl:377
│ [3] load_julia_startup() at ./client.jl:316
│ [4] exec_options(::Base.JLOptions) at ./client.jl:259
│ [5] _start() at ./client.jl:484
│ in expression starting at /mnt/d/SAMBIT/JULIA/JuliaInstallation/JuliaPro-1.4.1-1/Julia/etc/julia/startup.jl:5
└ @ Pkg.Operations /home/buildbot/build-worker/worker/juliapro-release-centos7-0_6/build/tmp_julia/share/julia/stdlib/v1.4/Pkg/src/Operations.jl:892

```

Maybe there is some issue with Conda installation? I am seeing the `Error: Error building `Conda` ` line a lot in these error messages.

---

<div class="post-metadata">

**Author:** ![SambitMishra98](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/sambitmishra98/32/14263_2.png) [@SambitMishra98](https://discourse.julialang.org/u/SambitMishra98)\
**Post date:** [May 22, 2020, 12:21pm UTC](https://discourse.julialang.org/t/pycall-not-properly-installed/39928/6 "2020-05-22T12:21:15Z")

</div>

I just installed Julia in Windows through Atom and successfully installed the packages I wanted. I am guessing there is some issue either with me using WSL, or using Jupyter Notebook, or a combination of both. I guess this is the only way I have right now to make use of the packages I want.  
Thank you EricForgy for trying to help me on this issue.

---

<div class="post-metadata">

**Author:** ![anon67531922](https://avatars.discourse-cdn.com/v4/letter/a/48db29/32.png) [@anon67531922](https://discourse.julialang.org/u/anon67531922)\
**Post date:** [May 22, 2020, 7:57pm UTC](https://discourse.julialang.org/t/pycall-not-properly-installed/39928/7 "2020-05-22T19:57:36Z")

</div>

I’m glad you got it to work. Sorry I wasn’t of more help 😅

PS: Welcome to Julia! :julia:🤝😊