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<== Date ==> | <== Thread ==> |
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Subject: | Re: Question about "import MySQLdb" module problem in CSS python script |
From: | "Kasemir, Kay" <[email protected]> |
To: | lzf neu <[email protected]> |
Cc: | "[email protected]" <[email protected]> |
Date: | Sun, 18 Sep 2016 15:00:51 +0000 |
Hi:
CSS BOY scripts are executed in jython, not python.
Most of the default python modules are also available in jython, but when you install python modules with binary dependencies like numpy, MySQL_python, .. those are not available in jython.
In jython you can instead call all the Java modules included in CS-Studio, for example the RDBUtil which allows access to Oracle, Postgres, MySQL.
But you shouldn’t really do that in a BOY script, because it’ll execute on the UI thread. Database operations are too slow, they will cause your complete UI to freeze.
The display tool was meant to display PVs, not to perform database operations.
If you do enjoy writing python code that interacts with MySQL, just do that outside of the display tool, then add a pcaspy CA server to provide the results as PVs, and display those PVs in CSS BOY.
-Kay
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