It was a bit more confusing with the Python instructions once SQL Server 2019 was installed with Python. The actual path I find is as follows:
C:\Program Files (x86)\Microsoft Visual Studio\Shared\Python37_64
Scripts run with an Execute command:
Declare @script nvarchar(max)=N'print(11-2)' execute sp_execute_external_script @language = N'Python', @script = @script
There is additional documentation in reference to SQL 2019's version of Python. There is a statement that recommends PIP be used only from a download of sqlmutils-x.x.x.zip located on git (https://www.github.com/Microsoft/sqlmutils) But there is a caveat. Currently this only works for R and not for Python (Anaconda and consequently pip). Python over SQL works but pip is not yet available. (11/25/2019)
Would be great to get an update when this occurs.