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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def create_dep(self, projects):
 """Create and return a new dep :param projects: the projects for the dep :type projects: :class:`jukeboxcore.djadapter.models.Project` :returns: The created dep or None :rtype: None | :class:`jukeboxcore.djadapter.models.Dep` :raises: None """

        dialog = DepCreatorDialog(projects=projects, parent=self)
        dialog.exec_()
        dep = dialog.dep
        return dep