动态创建类 - Python [英] Dynamically creating classes - Python

问题描述

我需要动态创建一个类.为了更详细，我需要动态创建 Django Form 类的子类.

I need to dynamically create a class. To go in futher detail I need to dynamically create a subclass of Django's Form class.

通过动态"我打算根据用户提供的配置创建一个类.

By "dynamically" I intend to create a class based on configuration provided by a user.

例如

我想要一个名为 CommentForm 的类，它应该是 Form 类的子类.

I want a class named CommentForm which should subclass the Form class.

该类应该有一个选定属性的列表.

The class should have a list of chosen attributes.

....在这种情况下

name = forms.CharField()
comment = forms.CharField(widget=forms.Textarea())

<小时>

有什么有用的提示吗?:)

---

Any useful tips? :)

推荐答案

您可以通过调用内置的 type 来动态创建类，同时传递适当的参数，例如:

You can create classes on the fly by calling the type built-in, passing appropriate arguments along, like:

CommentForm = type("CommentForm", (Form,), { 
    'name': forms.CharField(),
    ...
})

它适用于新式类.我不确定，这是否也适用于旧式类.

It works with new-style classes. I am not sure, whether this would also work with old-style classes.

这篇关于动态创建类 - Python的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！