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Implements data execution through the whole flow. Note that one could also pass the flow itself as the callable, so this class is not really needed. However, it serves as the base class for more complicated callables, e.g. which do some kind of preprocessing before executing the data with the flow.
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Inherited from Inherited from |
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Inherited from |
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Return the execution result. x -- data chunk
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Store everything for the execution. keyword arguments: flow -- flow instance for the execution nodenr -- optional nodenr argument for the flow execute method extensions -- List of the names of the extensions required by the callable. These are then activated by setup_environment.
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Return a fork of this callable, e.g. by making a copy. This method is always used before a callable is actually called, so instead of the original callable the fork is called. The ensures that the original callable is preserved when cachin is used. If the callable is not modified by the call it can simply return itself.
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