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POpythonic way to wrap xmlrpclib calls in similar multicalls
 

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  1. POpythonic way to wrap xmlrpclib calls in similar multicalls
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    <p>I'm writing a class that interfaces to a MoinMoin wiki via xmlrpc (simplified code follows):</p> <pre><code>class MoinMoin(object): token = None def __init__(self, url, username=None, password=None): self.wiki = xmlrpclib.ServerProxy(url + '/?action=xmlrpc2') if username and password: self.token = self.wiki.getAuthToken(username, password) # some sample methods: def searchPages(self, regexp): def getPage(self, page): def putPage(self, page): </code></pre> <p>now each of my methods needs to call the relevant xmlrpc method alone if there isn't authentication involved, or to wrap it in a multicall if there's auth. Example:</p> <pre><code>def getPage(self, page): if not self.token: result = self.wiki.getPage(page) else: mc = xmlrpclib.MultiCall(self.wiki) # build an XML-RPC multicall mc.applyAuthToken(self.token) # call 1 mc.getPage(page) # call 2 result = mc()[-1] # run both, keep result of the latter return result </code></pre> <p>is there any nicer way to do it other than repeating that stuff for each and every method?</p> <p>Since I have to call arbitrary methods, wrap them with stuff, then call the identically named method on another class, select relevant results and give them back, I suspect the solution would involve meta-classes or similar esoteric (for me) stuff. I should probably look at xmlrpclib sources and see how it's done, then maybe subclass their MultiCall to add my stuff...</p> <p>But maybe I'm missing something easier. The best I've come out with is something like:</p> <pre><code>def _getMultiCall(self): mc = xmlrpclib.MultiCall(self.wiki) if self.token: mc.applyAuthToken(self.token) return mc def fooMethod(self, x): mc = self._getMultiCall() mc.fooMethod(x) return mc()[-1] </code></pre> <p>but it still repeats the same three lines of code for each and every method I need to implement, just changing the called method name. Any better?</p>
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