Resolving "No module named 'pywintypes'" Error in Spotfire 14 Python environment

Problem:

Users may encounter a "ModuleNotFoundError: No module named 'pywintypes'" when using certain Python packages, particularly requests-negotiate-sspi, in Spotfire 14 Python environment. This issue is related to the pywin32 package, which requires a special post-installation step.

Solution:

- Identify the affected packages:

Typically, this issue affects packages that depend on pywin32, such as requests-negotiate-sspi.

Manual installation of pywin32:

a. Download the appropriate pywin32 wheel file for Python 3.11 from a trusted source.

b. Install the wheel file manually in the Spotfire Python environment:

For Analyst: [Spotfire installation path]\Python Packages Windows_[version]\site-packages
For Python Service: [Python Service installation path]\python\Lib\site-packages

- Run the post-installation script:

Locate the pywin32_postinstall.py script in the installed pywin32 package.
Run the script with administrator privileges using the Spotfire Python interpreter.

- Verify installation:

Open the Spotfire Python interpreter and attempt to import pywintypes.
If successful, retry the original package import (e.g., requests-negotiate-sspi).

- Update custom SPK files:

If using custom SPK files, ensure they do not include pywin32.
Document the manual installation step for pywin32 in your deployment process.

- Consider alternatives:

If possible, explore alternative packages that do not rely on pywin32 for your specific use case.

Note: This manual installation process is required because the Spotfire Package Manager (SPK) system cannot perform the necessary post-installation steps for pywin32. Always ensure that manually installed packages are compatible with your Spotfire version and Python environment.

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Source Case 301499