Krishnakant 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 > Happy hacking. > Krishnakant. > You don't need to have the names of the classes related to anything in the interface. Just use a list of classes, and have the user interface return the correct index for each class. Then (supposing the selection by the user is seln) use
Books = classes[seln]() If the classes are all in different modules, import them before creating the list of classes. regards Steve -- Steve Holden +1 571 484 6266 +1 800 494 3119 Holden Web LLC http://www.holdenweb.com/ -- http://mail.python.org/mailman/listinfo/python-list
