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POPython - Is it possible to get the name of the chained function?
 

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  1. POPython - Is it possible to get the name of the chained function?
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    <p>I'm working on a class that basically allows for method chaining, for setting some attrbutes for different dictionaries stored. </p> <p>The syntax is as follows:</p> <pre><code>d = Test() d.connect().setAttrbutes(Message=Blah, Circle=True, Key=True) </code></pre> <p>But there can also be other instances, so, for example:</p> <pre><code>d = Test() d.initialise().setAttrbutes(Message=Blah) </code></pre> <p>Now I believe that I can overwrite the "setattrbutes" function; I just don't want to create a function for each of the dictionary. Instead I want to capture the name of the previous chained function. So in the example above I would then be given "connect" and "initialise" so I know which dictionary to store these inside.</p> <p>I hope this makes sense. Any ideas would be greatly appreciated :) </p> <p>EDIT:</p> <p>Would this work / Be a good work-around the above problem:</p> <p>Using method overloading, I can have the following methods:</p> <pre><code>def setAttrbutes(self, Name="Foo", Message="", Circle=False): print "Attrbutes method called for 'Foo'" def setAttrbutes(self, Name="Boo", Message=""): print "Attrbutes method called for 'Boo'" </code></pre> <p>So therefore, I can say which method to call depends on the name that is used. For example, in main, if I have the following:</p> <pre><code>d.setAttrbutes(Name="Foo", Message="Hello world", Circle=True) # this will call the first d.setAttrbutes(Name="Boo", Message="Hello world") # this will call the second </code></pre> <p>Would this work, and, if not, why?</p>
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    1. COMethod chaining is an anti-pattern in Python. Functions that mutate an object idiomatically return `None`, like `list.sort`. This is intentional.
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    2. COMeanwhile, why do you want to capture the name of the previous function, instead of making use of something identifiable about what each function returns?
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    3. CO@abarnert So could I create the function "setAttrbutes" to be able to pass a name in? I.e. `setAttrbutes(Name="Connect", Circle=False);` and in main when I call the this: `setAttrbutes(Name="Connect", Circle=True)` it knows which setAttrbutes function to call? So another example: `setAttrbutes(Name="Blah", Message="Hello world")` does this make sense?
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