ArticleFolderCollection.py

class ArticleFolderCollection(object):
    """A simple iterable collection for ArticleFolder objects"""
    def __init__(self):
        self.folders = []

    def __iter__(self):
        for f in self.folders:
            yield f

    def __contains__(self, folder):
        for f in self.folders:
            if f.id == folder.id:
                return True
        return False

    def append(self,folder):
        self.folders.append(folder)