On Tuesday, October 20, 2015 at 6:21:08 AM UTC-7, A3 wrote: > > Thanks for the detailed explanation. >
And, just to play Captain Obvious, you probably don't need that much effort if both your functions are in the same .py file. /dps > > Op dinsdag 20 oktober 2015 03:11:53 UTC+2 schreef Anthony: >> >> If you have the function name, you can do: >> >> if function_name in globals(): >> >> And if you have the actual function object, you can do: >> >> if function.__name__ in globals(): >> >> Note, those will yield hits even if there is an object of that name >> defined in a model file. If that is a concern, you can diff the globals >> before and after executing the controller to get a list of objects >> specifically defined in the controller. To do that, at the top of the >> controller file (or anywhere before the first component you want to >> register): >> >> pre_controller_objects = dir() >> >> Then at the bottom of the controller (or after the last component): >> >> controller_objects = set(dir()) - set(pre_controller_objects) >> >> Then, wherever you want to test for the existence of a function: >> >> if function_name in controller_objects: >> >> Note, that will identify any objects defined in the controller, even if >> they are not functions. If that's a concern, you can further filter >> controller_objects to include only function objects. >> >> Finally, if you only want to identify specific actions that your have >> defined as components, you could use a special prefix/postfix to identify >> them, or just manually maintain a list of their names. One other option >> would be to create a decorator that registers a component name in a special >> object. In a module or model file, or at the top of the controller: >> >> class Component(object): >> def __init__(self): >> self.names = [] >> >> def __call__(self, f): >> self.names.append(f.__name__) >> return f >> >> component = Component() >> >> Then you would decorate components: >> >> @component >> def component1(): >> return dict() >> >> @component >> def component2(): >> return dict() >> >> Finally, wherever needed, check for a component as follows: >> >> if 'component1' in component.names: >> >> Anthony >> >> On Monday, October 19, 2015 at 4:19:30 PM UTC-4, A3 wrote: >>> >>> >>> I want to be able to test if a certain function exists in a controller. >>> (I am loading a component with help of another) >>> >>> controller: >>> default.py >>> def myfunction() >>> return >>> >>> def mytest() >>> if exists(myfunction()): >>> do this. >>> >> -- Resources: - http://web2py.com - http://web2py.com/book (Documentation) - http://github.com/web2py/web2py (Source code) - https://code.google.com/p/web2py/issues/list (Report Issues) --- You received this message because you are subscribed to the Google Groups "web2py-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to web2py+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
