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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_prefix(self):
 """ Each resource defined in config for pages as dict. This method returns key from config where located current resource. """

        for key, value in self.pages_config.items():
            if not hasattr(value, '__iter__'):
                value = (value, )
            for item in value:
                if type(self.node) == item\
                        or type(self.node) == getattr(item, 'model', None):
                    return key