May 2018
Beginner to intermediate
452 pages
11h 26m
English
Let's apply our knowledge of multiple inheritance to build a mixin that will give us some boilerplate validation logic by performing the following steps:
class ValidatedMixin: """Adds a validation functionality to an input widget""" def __init__(self, *args, error_var=None, **kwargs): self.error = error_var or tk.StringVar() super().__init__(*args, **kwargs)