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queue functions for execution later

Project description

I use Later objects for convenient queuing of functions whose execution occurs later in a priority order with capacity constraints.

Why not futures? I already had this, I prefer its naming scheme and interface, and futures did not seem to support prioritising execution.

Use is simple enough: create a Later instance and typically queue functions with the .defer() method:

L = Later(4)      # a Later with a parallelism of 4
LF = L.defer(func, *args, **kwargs)
x = LF()          # collect result

The .defer method and its sublings return a LateFunction, which is a subclass of cs.asynchron.Asynchron. As such it is a callable, so to collect the result you just call the LateFunction.

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