wx.lib.delayedresult.PreProcessChain

Represent a ‘delayed result pre-processing chain’, a kind of Handler. Useful when lower-level objects need to apply a sequence of transformations to the delayed result before handing it over to a final handler. This allows the starter of the worker function to not know anything about the lower-level objects.

Class Hierarchy

Inheritance diagram for class PreProcessChain:

Methods Summary

__init__	Wrap handler(result, *args, **kwargs) so that the result
addSub	Add a sub-callable, ie a callable(result, *args, **kwargs)
clone	Clone the chain. Shallow only. Useful when several threads
cloneAddSub	Convenience method that first clones self, then calls addSub()
count	How many pre-processors in the chain

Class API

class PreProcessChain

Represent a ‘delayed result pre-processing chain’, a kind of Handler. Useful when lower-level objects need to apply a sequence of transformations to the delayed result before handing it over to a final handler. This allows the starter of the worker function to not know anything about the lower-level objects.

Methods

__init__(self, handler, \*args, \*\*kwargs)

Wrap handler(result, *args, **kwargs) so that the result it receives has been transformed by us.

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addSub(self, callable, \*args, \*\*kwargs)

Add a sub-callable, ie a callable(result, *args, **kwargs) that returns a transformed result to the previously added sub-callable (or the handler given at construction, if this is the first call to addSub).

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clone(self)

Clone the chain. Shallow only. Useful when several threads must be started but have different sub-callables.

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cloneAddSub(self, callable, \*args, \*\*kwargs)

Convenience method that first clones self, then calls addSub() on that clone with given arguments.

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count(self)

How many pre-processors in the chain