delegate functions to member

[Ulrich Eckhardt]

Hi!

I have an extension module (a plugin written with Boost.Python) and around
that a wrapper class that adapts a few things. Since the module is a
plugin, there are multiple implementations of this. What I'm currently
doing is this:

 plugin = __import__(plugin_name)

 class PluginWrapper(plugin.PluginClass):
     ...

This means that the definition of class PluginWrapper actually depends on
the previously loaded module. What I would like to do is to define the
wrapper just once and instead pass the plugin module to the constructor:

 class PluginWrapper(object):
    ...
 plugin = __import__(plugin_name)
 instance = PluginWrapper(plugin)


Now, I use the wrapper to make some function more friendly (e.g. default
parameters, keyword-parameters, wrapping raw handles) but I want other
functions from the baseclass to remain untouched. If I use a baseclass,
this lookup is automatic. However, when I pass the instance to the
constructor, I have to store it in a member, and then I have to add code
for every function only to delegate it to that member.

Is there an easy and generic way out of this?

Thanks!

Uli

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