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Prep

md stubs-esp8266-test
cd stubs-esp8266-test
git init 
echo .venv >> .gitignore
python -m venv .venv

# Activate the virtual environment
.venv/Scripts/Activate.ps1 ( )

# install the stubs into the venv
pip install micropython-esp8266-stubs

# Optional : pyright cmdline checker
pip install pyright

# copy in some code to test the stubs
md project
copy ..\micropython-stubs\snippets\esp8266 project
copy ..\micropython-stubs\snippets\validate-stdlib project

code .

In vscode run the following command:

  • [F1]

    • Python: Select interpreter
      • select the .venv you just created : Python 3.9.13 ('.venv':venv)
    • Python: Restart Language Server

  • Workspace Settings

    • Python › Analysis: Diagnostic Mode
      • Workspace

  • Use Pymaker to connect to a MCU and open it in explorer this will cause a multi-root workspace to be created and opened

  • Save the workspace as stubs-esp-test.code-workspace

to simplify clean testing : quit vscode and reopen it using

code .\stubs-esp-test.code-workspace

MEMFS test

To test with the sample remote / virtual filesystem

To get started you need this:

  • install MEMFS from the VSIX file included in this repro : vscode-memfs-0.0.3.vsix

  • In VSCode , select 'F1 > [MemFS] Setup Workspace' (optionally save the workspace now)

NOTE: that as soon as a virtual filesystem is part of the workspace, Pylance will attempt to scan the local rootdrive (C:\ or '/' ) where the path is relative to the rootpath of the virtual filesystem.

After that essentially PyLance stops functiong for either the local or the virtual filesystem.

this is shown in the Pylance logs by looking for the tag : Search paths for \

[Info  - 12:39:18] (26416) Pylance language server 2022.6.30 (pyright 212d1465) starting
[Info  - 12:39:19] (26416) Server root directory: c:\Users\josverl\.vscode\extensions\ms-python.vscode-pylance-2022.6.30\dist
Notebook support: Legacy
[Info  - 12:39:20] (26416) Background analysis(1) root directory: c:\Users\josverl\.vscode\extensions\ms-python.vscode-pylance-2022.6.30\dist
[Info  - 12:39:20] (26416) Background analysis(1) started
[Info  - 12:39:20] (26416) Background analysis(3) root directory: c:\Users\josverl\.vscode\extensions\ms-python.vscode-pylance-2022.6.30\dist
[Info  - 12:39:20] (26416) Background analysis(3) started
[Info  - 12:39:21] (26416) Background analysis(2) root directory: c:\Users\josverl\.vscode\extensions\ms-python.vscode-pylance-2022.6.30\dist
[Info  - 12:39:21] (26416) Background analysis(2) started
[Info  - 12:39:21] (26416) Background analysis(4) root directory: c:\Users\josverl\.vscode\extensions\ms-python.vscode-pylance-2022.6.30\dist
[Info  - 12:39:21] (26416) Background analysis(4) started
[Info  - 12:39:21] (26416) No configuration file found.
[Info  - 12:39:22] (26416) No pyproject.toml file found.
[Info  - 12:39:22] (26416) Setting pythonPath for service "MemFS - Sample": "C:\Users\josverl\AppData\Local\Microsoft\WindowsApps\python3.9.exe"
[Warn  - 12:39:23] (26416) stubPath \typings is not a valid directory.
[Info  - 12:39:23] (26416) Assuming Python version 3.9
[Info  - 12:39:23] (26416) Assuming Python platform Windows
[Info  - 12:39:23] (26416) Search paths for \
[Info  - 12:39:24] (26416)   c:\Users\josverl\.vscode\extensions\ms-python.vscode-pylance-2022.6.30\dist\typeshed-fallback\stdlib
[Info  - 12:39:24] (26416)   \
[Info  - 12:39:24] (26416)   \typings
....
[Info  - 12:39:24] (26416) Adding fs watcher for directories:
 \
[Info  - 12:39:24] (26416) Searching for source files
[Info  - 12:39:24] (26416) Auto-excluding \$Recycle.Bin\S-1-12-1-3020494159-1235939459-3438115750-967420959\$REJ16W7.venv
[Info  - 12:39:24] (26416) Auto-excluding \$Recycle.Bin\S-1-12-1-3020494159-1235939459-3438115750-967420959\$RGXEZSB.venv
...
[Warn  - 12:39:24] (26416) Skipping broken link "\$Recycle.Bin\S-1-5-18"
[Warn  - 12:39:24] (26416) Skipping broken link "\PerfLogs"
[Warn  - 12:39:24] (26416) Skipping broken link "\Program Files\WindowsApps"
[Warn  - 12:39:25] (26416) Skipping broken link "\ProgramData\Microsoft\Crypto\PCPKSP\WindowsAIK"
....

[Error - 12:47:03] (29996) Enumeration of workspace source files is taking longer than 10 seconds.
This may be because:
* You have opened your home directory or entire hard drive as a workspace
* Your workspace contains a very large number of directories and files
* Your workspace contains a symlink to a directory with many files
* Your workspace is remote, and file enumeration is slow
To reduce this time, open a workspace directory with fewer files or add a pyrightconfig.json configuration file with an "exclude" section to exclude subdirectories from your workspace. For more details, refer to https://github.com/microsoft/pyright/blob/
  • select 'F1 > [MemFs] Create Files' and notice how the explorer is now populated
  • ... try things out, e.g. IntelliSense in memfs-files, create new files, save them, etc
  • select 'F1 > [MemFs] Delete Files' or reload to restart

repro with Pymaker2

This requires Pymaker2 and at least one microcontrollers running MicroPython.

  • install the pymakr v2.x extension
  • connect to a microcontroller
  • mount the microcontroller's filesystem in VSCVode explorer
  • Notice PyLance stop functioning.

recording