When attempting to build an SPK containing Python packages through the TIBCO Spotfire Analyst Python Interpreter from a command line prompt, it fails with the error:
"Cannot open include file: 'Python.h': No such file or directory"

The same error also occur when attempting to install python packages to the Spotfire Analyst Python Interpreter from a command line prompt:
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>"C:\Users\lizliu\AppData\Local\TIBCO\Spotfire\10.10.2\Modules\Python Interpreter_3.810.10300.14\python\python.exe" -m pip install cvxpy
........
scsmodule.c
src/scsmodule.c(1): fatal error C1083: Cannot open include file: 'Python.h': No such file or directory
{}
{}
error: Command "C:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Tools\MSVC\14.29.30133\bin\HostX86\x64\cl.exe /c /nologo /Ox /W3 /GL /DNDEBUG /MD -DPYTHON -DCTRLC=1 -DDLONG=1 -DCOPYAMATRIX -Iscs/include -Iscs/linsys -Iscs/linsys/cpu/direct/ -Iscs/linsys/external/amd -Iscs/linsys/external/dqlql -IC:\Users\lizliu\AppData\Local\Temp\pip-build-env-cg0ot51u\overlay\Lib\site-packages\numpy\core\include -IC:\Users\lizliu\AppData\Local\TIBCO\Spotfire\10.10.2\Modules\Python Interpreter_3.810.10300.14\python\include -IC:\Users\lizliu\AppData\Local\TIBCO\Spotfire\10.10.2\Modules\Python Interpreter_3.810.10300.14\python\include -IC:\Program Files (x86)\Microsoft Visual Studio\2019\BuildTools\VC\Tools\MSVC\14.29.30133\include -IC:\Program Files (x86)\Windows Kits\NETFXSDK\4.8\include\um -IC:\Program Files (x86)\Windows Kits\10\include\10.0.19041.0\ucrt -IC:\Program Files (x86)\Windows Kits\10\include\10.0.19041.0\shared -IC:\Program Files (x86)\Windows Kits\10\include\10.0.19041.0\um -IC:\Program Files (x86)\Windows Kits\10\include\10.0.19041.0\winrt -IC:\Program Files (x86)\Windows Kits\10\include\10.0.19041.0\cppwinrt /Tcsrc/scsmodule.c /Fobuild\temp.win-amd64-3.8\Release\src/scsmodule.obj -O3" failed with exit status 2
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The cause is that the include file "Python.h" is required by Python to build or install python packages from source but the TIBCO Spotfire Analyst Python Interpreter does not have access to this out of the box.

1. Shut down TIBCO Spotfire Analyst.
2. On the TIBCO Spotfire Analyst client machine, do an independent Open Source Python installation, using the same version as the Python Interpreter for your Spotfire Analyst client (for example, python interpreter 3.8.10 for Spotfire Analyst 11.4.0). Note: you can find that version number by looking at the Python Interpreter module in your Spotfire Modules folder, which is named Python Interpreter_[version number] - e.g. C:\Users\lizliu\AppData\Local\TIBCO\Spotfire\10.10.2\Modules\Python Interpreter_3.810.10300.14. 
3. From the Python installation folder, copy the "include" folder (for example, C:\Python381\include) and paste it into the TIBCO Spotfire Analyst Python Interpreter directory (for example: C:\Users\lizliu\AppData\Local\TIBCO\Spotfire\11.4\Modules\Python Interpreter_3.810.10300.14\python).