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.
>
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