Unable to apply multiple objectlistview filters chosen by user

Question

I am attempting to add an Excel like filtering option to a program that is processing 3 xml files and optionally an xls file. One of the problems I am running into is finding good examples of applying multiple filters at once. I understand that Filter.Chain allows for multiple "pre-built" filters to be applied at once, the main trouble is being able to dynamically create the filters then applying them. For example, one of the things being looked at by the program is vehicle makes such as Honda, Ford, etc and I would like to be able to select which makes I want to see in the ObjectListView.

Due to the amount of code in use it is hosted at pastebin: Main Gui Worker Script Input Panel Primary Output Secondary Output

What I am hoping to find are examples of how I would be able to add an Excel like filtering. Currently I have a menu option set that opens a MultiChoiceDialog window which provides a list of options, but I am unable to find a good pythonic way of taking the selections and applying them as a filter or series of filters.

Thanks in advance.

Answer 1

It appears that you are reading an Excel file into your ObjectListView widget. I think it would be easier to load the data into a sqlite database and then use SQL commands to do your filtering. I prefer using SQLAlchemy. That way I can create a class that represents the data that I can use both for SQLAlchemy and for my ObjectListView widget.

You can read about some of this sort of thing in the following articles:

• http://www.blog.pythonlibrary.org/2012/06/04/wxpython-and-sqlalchemy-loading-random-sqlite-databases-for-viewing/
• http://www.blog.pythonlibrary.org/2011/11/10/wxpython-and-sqlalchemy-an-intro-to-mvc-and-crud/