將方法參數傳遞給它的父類構造函數（Flask - ModelView.as_view（））

Question

這是一個比Flask問題更普遍的Python問題。

這段代碼來自https://github.com/mitsuhiko/flask/blob/master/flask/views.py#L18。

@classmethod 
def as_view(cls, name, *class_args, **class_kwargs): 
    """Converts the class into an actual view function that can be used 
    with the routing system. Internally this generates a function on the 
    fly which will instantiate the :class:`View` on each request and call 
    the :meth:`dispatch_request` method on it. 

    The arguments passed to :meth:`as_view` are forwarded to the 
    constructor of the class. 
    """ 
    def view(*args, **kwargs): 
     self = view.view_class(*class_args, **class_kwargs) 
     return self.dispatch_request(*args, **kwargs) 

    if cls.decorators: 
     view.__name__ = name 
     view.__module__ = cls.__module__ 
     for decorator in cls.decorators: 
      view = decorator(view) 

    # we attach the view class to the view function for two reasons: 
    # first of all it allows us to easily figure out what class-based 
    # view this thing came from, secondly it's also used for instantiating 
    # the view class so you can actually replace it with something else 
    # for testing purposes and debugging. 
    view.view_class = cls 
    view.__name__ = name 
    view.__doc__ = cls.__doc__ 
    view.__module__ = cls.__module__ 
    view.methods = cls.methods 
    return view 

有人可以給我解釋一下這個as_view()功能到底如何，因爲它說，它的方法評論它的參數轉發到View類的構造函數？

如果不是一個直接的解釋，也許是在正確的方向上推進具體什麼我需要學習Python的明智，以更好地瞭解發生了什麼事情。

感謝

Answer 1

這條線路是最關鍵的一步：

self = view.view_class(*class_args, **class_kwargs) 

它正在傳遞到as_view的參數和使用他們創造的view使用這些參數的實例。