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POHow to initialize a python object once and share across other modules?
 

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  1. POHow to initialize a python object once and share across other modules?
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    <p>For the life of me I am finding me python transition to be extremely frustrating. One of the things I am attempting at doing is to initialize a single instance of a class from a configuration dictionary, then access that class in other modules.</p> <p>The problems I am facing / the approaches I have taken are not working out and am hoping someone could steer in the right 'pythonic' approach.</p> <p>First off my app can be initialized as part of a twistd plugin, or as a standalone script.</p> <pre><code>import resource class App(object): _config = None _someotherobject = None def __init__(self, config): self._config = config .... def main(): global myapp myapp = App({}) # Could use help here, how to pass config to it myapp = None #Global doesnt work as I expect, it doesnt modify this instance, stays as None if __name__ == '__main__': main() #-----------resource.py class Foo(object): def foo(self): app.myapp.somefunction() #NoneType object has no attribute </code></pre> <p>I have verified the app object is created before the code in the other module is kicked off. I just can't figure out why the 'global' instance in the module doesn't actually do what I expect, also confused as to how to reference the instance from another module.</p> <p>----- Edit ------ To clarify a couple points, the script is called with <code>python app.py</code> app.py references a module called <code>resources.py</code> which is a bunch of class definitions. In some of the classes, when executed, they reference the 'singleton' instance of app.myapp.</p>
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    1. USMatthew Ward
    1. USMatthew Ward
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