I have four instances of Python installed on my machine, 2.7x32 & 3.7x32 that I installed manually into their default locations, and 2.7x64 & 3.4x64 that came pre-packaged with a third party piece of software (SPSS). Py Launcher successfully detects the two installations that I installed manually but cannot see the two installations that came with the third party software.
Here (https://www.python.org/dev/peps/pep-0397/#configuration-file) there is an allusion to there being commands which allow customization of Py launcher within user space (monkeying around with the registry in a corporate environments is often disallowed).
I have created a py.ini file using the [commands] section with respective copies of the following entry: "3.4-64="C:\Program Files\IBM\SPSS\Statistics\24\Python3\python.exe" and saved to "C:\Users\<USER>\AppData\Local" but the additional installations do not appear.
I have added the two additional installation directories (and Scripts folders) to the PATH variable and confirmed that the changes persisted (displayed below):
PATH=C:\Program Files (x86)\Python37-32\Scripts\;C:\Program Files (x86)\Python37-32\;C:\Python27\;C:\Python27\Scripts;C:\Program Files\IBM\SPSS\Statistics\24\Python\;C:\Program Files\IBM\SPSS\Statistics\24\Python\Scripts\;C:\Program Files\IBM\SPSS\Statistics\24\Python3\;C:\Program Files\IBM\SPSS\Statistics\24\Python3\Scripts\;
Current result of "py -0p" (List the available pythons with paths)
C:\>py -0p
Installed Pythons found by py Launcher for Windows
-3.7-32 "C:\Program Files (x86)\Python37-32\python.exe" *
-2.7-32 C:\Python27\python.exe
Expected result of "py -0p"
C:\>py -0p
Installed Pythons found by py Launcher for Windows
-3.7-32 "C:\Program Files (x86)\Python37-32\python.exe" *
-2.7-32 C:\Python27\python.exe
-3.4-64 "C:\Program Files\IBM\SPSS\Statistics\24\Python3\python.exe"
-2.7-64 "C:\Program Files\IBM\SPSS\Statistics\24\Python\python.exe"
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