component.py 文件源码

def update_context(self, context, app=None):
        """Replace the component's context with a new one.

        Args:
            context (dict): The new context to set this component's context to.

        Keyword Args:
            app (flask.Flask, optional): The app to update this context for. If
                not provided, the result of ``Component.app`` will be used.
        """
        if (app is None and self._context is _CONTEXT_MISSING
                and not in_app_context()):
            raise RuntimeError("Attempted to update component context without"
                               " a bound app context or eager app set! Please"
                               " pass the related app you want to update the"
                               " context for!")

        if self._context is not _CONTEXT_MISSING:
            self._context = ImmutableDict(context)
        else:
            key = self._get_context_name(app=app)
            setattr(_CONTEXT_LOCALS, key, ImmutableDict(context))