Class PythonChildBackEnd

Function to initialize class members.

Parameters:

• job - The qube job object passed to the worker, this represents a job instance.

Overrides: object.__init__

Determine the arguments necessary to invoke the child process.

This is the main method that differentiates derived classes, and is probably the only method that will need to be overridden.

Parameters:

• port (int) - the port on which the PyCmdDispatcher's backchannel instance is listening, usually passed as a parameter to the child_bootstrapper.py script which starts up the pyCmdExecutor inside child process started by the PyCmdDispatcher

Returns: tuple ([childArgs], [pyInitCmds])

Return a tuple of a list of args to start the python interpreter, and a list of python commands to initialize the python working environment.

Raises:

• NotImplementedError - Raised when this method is not overridden in a derived class.

This is only overridden if a 3rd-party application which will be started cannot use the standard child_bootstrapper.py script. This can happen if the 3rd-party app doesn't support passing arguments to the bootstrapper.

Parameters:

• port (int) - the port on which the PyCmdDispatcher's backchannel instance is listening, usually passed as a parameter to the child_bootstrapper.py script which starts up the pyCmdExecutor inside child process started by the PyCmdDispatcher

Initialize a PyCmdDispatcher instance.

The PyCmdDispatcher is this side of the bi-directional communication with a python interpeter running in a child process. It is the mechanism to dispatch the commands to the interpreter and handle any return values or exceptions.

Returns: pythonChildHandler.PyCmdDispatcher

Return a pythonChildHandler.PyCmdDispatcher object, which will have a running python process of some sort (python, mayaPy, houdini, etc.) as a child attribute

Perform any steps necessary to initialize the working enviroment prior to beginning any agendaItem-specific steps.

Overrides: pythonBackEnd.PythonQubeBackEnd.jobSetup

Request an agendaItem (work) from the supervisor and do any steps necessary to perform the work.

Raises:

• NotImplementedError - Raised when this method is not overridden in a derived class.

Overrides: pythonBackEnd.PythonQubeBackEnd.executeWork

Perform any steps necessary to clean up the working enviroment prior to shutting down the job instance.

Overrides: pythonBackEnd.PythonQubeBackEnd.jobTeardown

DEFAULT_PYTHON

Value:

'/opt/local/Library/Frameworks/Python.framework/Versions/2.7/Resources /Python.app/Contents/MacOS/Python'