On Tue, Jan 13, 2009 at 9:46 PM, Krishnakant <krm...@gmail.com> wrote: > hello all, > I have a strange situation where I have to load initiate an instance of > a class at run-time with the name given by the user from a dropdown > list. > Is this possible in python and how? > To make things clear, let me give the real example. > there is an inventory management system and products belong to different > categories. > There are predefined categories in the database and for each category > there is a module which contains a class made out of pygtk. > This means what class gets instantiated and displayed in the gui depends > on the choice a user makes in the dropdown. > Now, I could have created a list of if conditions for all the categories > as in > if categorySelection == "books": > Books = BookForm() > > However this is a problem because when there will be more than 100 > categories there will be that many if conditions and this will make the > code uggly. > so my idea is to name the class exactly after the name of the category > so that when the user selects a category that name is used to initialise > the instance of that class. > So is it possible to initialise an instance of a class given its name > from a variable? > thanks and
Assuming all the classes are in the same module as the main program: instance = vars()[class_name](args, to, init) Assuming the classes are all in the same module "mod", which is separate from the main program: instance = getattr(mod, class_name)(args, to, init) Cheers, Chris -- Follow the path of the Iguana... http://rebertia.com -- http://mail.python.org/mailman/listinfo/python-list
