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Initial refactor of task dependency system....
Initial refactor of task dependency system. We are thinking about refactoring the task dependency system. Currently is is based on engine properties and a function sent with each task. In this commit, I have added a TaskRejectError that tasks can raise to indicate that the engine doesn't have the required dependencies. For now I have not removed any of the old stuff, but I have added warnings that we might remove the older *_prop* methods in IMultiEngine. See this ticket for more info: https://bugs.launchpad.net/bugs/361419
Fernando Perez - - Load All Authors

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test_combo.txt
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=======================
Combo testing example
=======================
This is a simple example that mixes ipython doctests::
In [1]: import code
In [2]: 2**12
Out[2]: 4096
with command-line example information that does *not* get executed::
$ mpirun -n 4 ipengine --controller-port=10000 --controller-ip=host0
and with literal examples of Python source code::
controller = dict(host='myhost',
engine_port=None, # default is 10105
control_port=None,
)
# keys are hostnames, values are the number of engine on that host
engines = dict(node1=2,
node2=2,
node3=2,
node3=2,
)
# Force failure to detect that this test is being run.
1/0
These source code examples are executed but no output is compared at all. An
error or failure is reported only if an exception is raised.
NOTE: the execution of pure python blocks is not yet working!