Athena Developer Guide

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Athena Chapter 6 Scripting Version/Issue: 2.0.0 1. This creates a new Python object of type Sequencer, having the same name as the newly created Athena Sequencer. 2. This creates a new Python object of type Algorithm, having the same name as the newly created Athena Algorithm. The Python commands that might require a subsequent synchronization are shown in Listing 6.7: Listing 6.7 Examples of Python commands that might create new Algorithms or Services theApp.ExtSvc = [...] theApp.TopAlg = [...] Sequencer.Members = [...] Sequencer.BranchMembers = [...] OutStream.AcceptAlgs = [...] OutStream.RequireAlgs = [...] OutStream.VetoAlgs = [...] 6.8 Controlling job execution This is very limited in the prototype, and will be replaced in a future release by the ability to call functions on the Python objects corresponding to the ApplicationMgr (theApp), Algorithms, and Services. In the prototype, control is returned from the Python shell to the Athena environment by the command in Listing 6.8: Listing 6.8 Python command to resume Athena execution >>> theApp.Go [1] Notes: 1. This is a temporary command that will be replaced in a future release by a more flexible ability to access more functions of the ApplicationMgr. This will cause the currently configured event loop to be executed, after which control will be returned to the Python shell. Typing Ctrl-D (holding down the Ctrl key while striking the D key) at the Python shell prompt will cause an orderly termination of the job. Althernatively, the command shown in Listing 6.9 will also cause an orderly application termination. Listing 6.9 Python command to terminate Athena execution >>> theApp.Exit [1] page 40
Athena Chapter 6 Scripting Version/Issue: 2.0.0 This command, used in conjunction with the theApp.Go command, can be used to execute a Python script in batch rather than interactive mode. This provides equivalent functionality to a job options text file, but using the Python syntax. An example of such a batch Python script is shown in Listing 6.10: Listing 6.10 Python batch script >>> theApp.TopAlg = [ "HelloWorld" ] [other configuration commands] >>> theApp.Go >>> theApp.Exit page 41
Page 1 and 2: ATLAS Athena The ATLAS Common Frame
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