cannot install on Windows 10

[isaac2lord]

Have already installed nodejs 8.9.3 with conda, bumped into the following error when trying to install plotly-extension with command jupyter labextension install @jupyterlab/plotly-extension --debug:

> C:\Users\<>\AppData\Local\Continuum\anaconda3\npm.CMD pack @jupyterlab/plotly-extension
jupyterlab-plotly-extension-0.14.5.tgz
Traceback (most recent call last):

  File "C:\Users\<>\AppData\Local\Continuum\anaconda3\lib\site-packages\jupyterlab\labextensions.py", line 71, in start
    ans = self.run_task()

  File "C:\Users\<>\AppData\Local\Continuum\anaconda3\lib\site-packages\jupyterlab\labextensions.py", line 100, in run_task
    for arg in self.extra_args

  File "C:\Users\<>\AppData\Local\Continuum\anaconda3\lib\site-packages\jupyterlab\labextensions.py", line 100, in <listcomp>
    for arg in self.extra_args

  File "C:\Users\<>\AppData\Local\Continuum\anaconda3\lib\site-packages\jupyterlab\commands.py", line 210, in install_extension
    return handler.install_extension(extension)

  File "C:\Users\<>\AppData\Local\Continuum\anaconda3\lib\site-packages\jupyterlab\commands.py", line 347, in install_extension
    info = self._install_extension(extension, tempdir)

  File "C:\Users\<>\AppData\Local\Continuum\anaconda3\lib\tempfile.py", line 807, in __exit__
    self.cleanup()

  File "C:\Users\<>\AppData\Local\Continuum\anaconda3\lib\tempfile.py", line 811, in cleanup
    _shutil.rmtree(self.name)

  File "C:\Users\<>\AppData\Local\Continuum\anaconda3\lib\shutil.py", line 494, in rmtree
    return _rmtree_unsafe(path, onerror)

  File "C:\Users\<>\AppData\Local\Continuum\anaconda3\lib\shutil.py", line 393, in _rmtree_unsafe
    onerror(os.rmdir, path, sys.exc_info())

  File "C:\Users\<>\AppData\Local\Continuum\anaconda3\lib\shutil.py", line 391, in _rmtree_unsafe
    os.rmdir(path)

PermissionError: [WinError 32] The process cannot access the file because it is being used by another process: 'C:\\Users\\<>\\AppData\\Local\\Temp\\tmpet5pksuo'


Errored, use --debug for full output:
PermissionError: [WinError 32] The process cannot access the file because it is being used by another process: 'C:\\Users\\<>\\AppData\\Local\\Temp\\tmpet5pksuo'

Any words of wisdom would be appreciated.

[isaac2lord]

Issue has been resolved, had to restart jupyterlab. After starting it again, it asks for "Build Suggestion" and I clicked "build" and it got it done.

[gnestor]

Good news!

[darkniobe]

I ran into this exact problem with Nodejs version 10. It appears to be similar to a problem noted in issue #132 . I was able to resolve it by downloading Nodejs 6 from here: https://nodejs.org/download/release/v6.14.4/node-v6.14.4-win-x64.zip
then extracting it and putting it in my path somewhere before Nodejs 10.

[jmrouet]

PermissionError: [WinError 32] The process cannot access the file because it is being used by another process: 'C:\Users\<>\AppData\Local\Temp\tmpet5pksuo'

What worked for me on Win10, was to temporarily patch the shutil.py module in my conda environment
in /Lib/shutil.py
look for method:
def _rmtree_unsafe(path, onerror):
and replace the last line:
onerror(os.rmdir, path, sys.exc_info())
with
if True: # changed temporarily to solve a jupyterinstall issue
print("os.rmdir: ignoring OSError")
pass
else:
onerror(os.rmdir, path, sys.exc_info())

[vidartf]

Note that this should be fixed from Python 3.8 onwards.

[MaximilianHoffmann]

Doesn't seem fixed for me

[vidartf]

I'm thinking of this being included now (https://bugs.python.org/issue26660).

[vidartf]

That might be different though (another process using vs access denied)... :-/

[asodeur]

This is a different issue, indeed. Seems hard to believe (rightly so) for non-Windows developers that rmtree is working async in Windows and there is no easy way to tell if it actually has finished.

The usual strategy to cope with this is some sort of exponential backoff. See this (and corresponding PR) for essentially the same issue hitting Python's testsuite.

[bjudkewitz]

Command line shutil.py patch, if you are using conda:

rename %CONDA_PREFIX%\Lib\shutil.py shutil.bak
powershell -Command "(gc %CONDA_PREFIX%\Lib\shutil.bak) -replace 'onerror\(os.rmdir, path, sys.exc_info\(\)\)', 'print(\"os.rmdir: ignoring OSError\") #$&' | Out-File -encoding ASCII %CONDA_PREFIX%\Lib\shutil.py"