django模版中带参数调用任意函数的方法

#template_filters.py
@register.filter
def template_args(instance, arg):
    """
    stores the arguments in a separate instance attribute
    """
    if not hasattr(instance, "_TemplateArgs"):
        setattr(instance, "_TemplateArgs", [])
    instance._TemplateArgs.append(arg)
    return instance
@register.filter
def template_method(instance, method):
    """
    retrieves the arguments if any and calls the method
    """
    method = getattr(instance, method)
    if hasattr(instance, "_TemplateArgs"):
        to_return = method(*instance._TemplateArgs)
        delattr(instance, '_TemplateArgs')
        return to_return
    return method()

{{ instance|template_args:"value1"|template_args:"value2"|template_args:"value3"|template_method:"test_template_call" }}