Question 306515 in Visual Studio Code Question posted in
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Visual Studio Code – Trying to install JPype1 but getting errors: cl.exe' failed with exit code 2

Im trying to install JPype1
but i keep getting this:

error: command 'C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\bin\HostX86\x86\cl.exe' failed with exit code 2
      [end of output]

  note: This error originates from a subprocess, and is likely not a problem with pip.
  ERROR: Failed building wheel for JPype1
Failed to build JPype1
ERROR: Could not build wheels for JPype1, which is required to install pyproject.toml-based projects

I’m running on Python 3.12.0

Visual Studio 2022 Developer Command Prompt v17.8.3

and pip 23.3.1

Please help 🙁 i need it for an assignment

I tried using

pip install --upgrade pip setuptools

and the outcome was:

WARNING: The scripts pip.exe, pip3.12.exe and pip3.exe are installed in 'C:UsersxxxAppDataRoamingPythonPython312Scripts' which is not on PATH.
  Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location.
Successfully installed pip-23.3.2 setuptools-69.0.2

I try downloading JPype1 again and the output was:

Defaulting to user installation because normal site-packages is not writeable
Collecting JPype1
  Using cached JPype1-1.4.1.tar.gz (797 kB)
  Installing build dependencies ... done
  Getting requirements to build wheel ... done
  Preparing metadata (pyproject.toml) ... done
Requirement already satisfied: packaging in c:usersxxxappdataroamingpythonpython312site-packages (from JPype1) (23.2)
Building wheels for collected packages: JPype1
  Building wheel for JPype1 (pyproject.toml) ... error
  error: subprocess-exited-with-error

  × Building wheel for JPype1 (pyproject.toml) did not run successfully.
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2

Answers


  1. 0

    Unfortunately, jype1 is only supported till python 3.10 yet.

    https://pypi.org/project/JPype1/#:~:text=JPype%20is%20a%20Python%20module,scientific%20computing%2C%20and%20much%20more.

    You need to downgrade your python to 3.10 or less.

    enter image description here

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  2. 0

    I understand you’re encountering an issue with the JPype1 installation.

    Here’s a detailed, step-by-step guide to troubleshoot the problem:

    1. Install Microsoft Visual C++ Build Tools:

      • The error with cl.exe indicates a problem related to Microsoft Visual C++ Build Tools.
      • Steps:
        1. Visit the Official Microsoft Website to download the latest version.
        2. Run the installer and follow the on-screen instructions to complete the installation.

    2. Add to PATH:

      • The warning about pip.exe, pip3.12.exe, and pip3.exe suggests they are not in your PATH.
      • Steps:
        1. Right-click on ‘This PC’ or ‘My Computer’ and select ‘Properties’.
        2. Click on ‘Advanced system settings’ and then ‘Environment Variables’.
        3. Under ‘System variables’, find and select the ‘Path’ variable, then click ‘Edit’.
        4. Add C:UsersxxxAppDataRoamingPythonPython312Scripts to the list and click ‘OK’.

    3. Run as Administrator:

      • Running the command prompt as an administrator can solve permission-related issues.
      • Steps:
        1. Type cmd in the Windows search bar.
        2. Right-click on ‘Command Prompt’ and select ‘Run as administrator’.
        3. Proceed with the installation commands in this elevated command prompt.

    4. Use a Virtual Environment:

      • Isolating your project in a virtual environment can prevent conflicts.
      • Steps:
        1. Open your command prompt.
        2. Create a virtual environment: Run python -m venv venv.
        3. Activate the virtual environment: Run venvScriptsactivate on Windows.

    5. Install a Precompiled Wheel:

      • A precompiled wheel can be an easier alternative if building from source is problematic.
      • Steps:
        1. Visit Unofficial Windows Binaries for Python Extension Packages.
        2. Download the appropriate .whl file for JPype1 that matches your Python version.
        3. Install it using pip install path_to_whl_file.

    6. Check for Dependencies:

      • Ensuring all dependencies are up-to-date can resolve hidden issues.
      • Steps:
        1. Run pip list --outdated to see if any Python packages are outdated.
        2. Update any outdated packages, especially those related to JPype1.

    Please note that this message was generated by an artificial intelligence system currently in its beta phase.
    It is part of a script designed to automatically adopt the post format and provide solutions to the described problem.
    While I strive to offer accurate and helpful advice, I cannot guarantee the effectiveness of these solutions due to the automated nature of this response.
    My apologies if these steps do not resolve your issue, and I’m not directly responsible if the provided solutions are not successful.
    Your understanding is greatly appreciated.

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