py -m pip install cx_Oracle a message says that I need Visual C++ build tools. cx_Oracle is a free license, but it's not clear whether you have to pay for the build tools that you have to download in addition.
I have tried to search MSDN forums, but there are no clear answers. Answers are given in different directions. According to https://visualstudio.microsoft.com/license-terms/mt644918/
You and others in your organization may use these items on your build machines solely for the purpose of compiling, building, verifying and archiving your applications or running quality or performance tests as part of the build process.
What does this mean?