julia.install() fails on python import error

I am trying to run a Julia script from python. I have Julia 1.6.4 installed (also tried 1.7.3) and installed pip install julia from Pycharm’s terminal in the virtual environment. When importing julia and then running julia.install() I get the following error message:

I use Pycharm with a virtual environment with Python 3.9.7 for my project. However, I have also tried different python versions in different virtual environments or by using the base python installed. All give the same error.

Also, ~/.julia/packages/PyCall/*/deps/build.log does not exist for me.

[ Info: Trying to import PyCall...
Fatal Python error: init_import_size: Failed to import the site module
Python runtime state: initialized
Traceback (most recent call last):
  File "C:Program FilesWindowsAppsPythonSoftwareFoundation.Python.3.9_3.9.3568.0_x64__qbz5n2kfra8p0libsite.py", line 73, in <module>
    import os
  File "C:Program FilesWindowsAppsPythonSoftwareFoundation.Python.3.9_3.9.3568.0_x64__qbz5n2kfra8p0libos.py", line 29, in <module>
    from _collections_abc import _check_methods
  File "C:Program FilesWindowsAppsPythonSoftwareFoundation.Python.3.9_3.9.3568.0_x64__qbz5n2kfra8p0lib_collections_abc.py", line 12, in <module>
    GenericAlias = type(list[int])
TypeError: 'type' object is not subscriptable
Traceback (most recent call last):
  File "<input>", line 1, in <module>
  File "C:Users<user>PycharmProjects<project>venvlibsite-packagesjuliatools.py", line 118, in install
    raise PyCallInstallError("Installing", output)
julia.tools.PyCallInstallError: Installing PyCall failed.
** Important information from Julia may be printed before Python's Traceback **
Some useful information may also be stored in the build log file
`~/.julia/packages/PyCall/*/deps/build.log`.```

JavaScript
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[ Info: Trying to import PyCall...
Fatal Python error: init_import_size: Failed to import the site module
Python runtime state: initialized
Traceback (most recent call last):
  File "C:Program FilesWindowsAppsPythonSoftwareFoundation.Python.3.9_3.9.3568.0_x64__qbz5n2kfra8p0libsite.py", line 73, in <module>
    import os
  File "C:Program FilesWindowsAppsPythonSoftwareFoundation.Python.3.9_3.9.3568.0_x64__qbz5n2kfra8p0libos.py", line 29, in <module>
    from _collections_abc import _check_methods
  File "C:Program FilesWindowsAppsPythonSoftwareFoundation.Python.3.9_3.9.3568.0_x64__qbz5n2kfra8p0lib_collections_abc.py", line 12, in <module>
    GenericAlias = type(list[int])
TypeError: 'type' object is not subscriptable
Traceback (most recent call last):
  File "<input>", line 1, in <module>
  File "C:Users<user>PycharmProjects<project>venvlibsite-packagesjuliatools.py", line 118, in install
    raise PyCallInstallError("Installing", output)
julia.tools.PyCallInstallError: Installing PyCall failed.
** Important information from Julia may be printed before Python's Traceback **
Some useful information may also be stored in the build log file
`~/.julia/packages/PyCall/*/deps/build.log`.```
​
​

Answer

Julia needs to have PyCall installed
PyCall in Julia needs to be configured to use the same Python that you are using to call Julia from

For more information see this post: I have a high-performant function written in Julia, how can I use it from Python?

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Answer