Python 3.5中的新typing
模块提供了许多用于类型注释的工具。它是否提供了封装 class 概念的对象或类型? 功能的想法怎么样?
在下面的定义装饰器的代码中,class_
应该代表什么? function
应该代表什么? (typing.Callable
是不合适的,因为例如一个类是可调用的,但是代码正试图识别方法。)(no_type_check()
模块中的typing
装饰器本身可能是装饰器的原型这样做。no_type_check()
本身没有任何注释,类型提示或其他。)
import typing
def is_double_underscore_name (name):
return len(name) > 4 and name.startswith('__') and name.endswith('__')
# This code will not run, because 'class_' and 'function' are names that do not have any
# predefined meaning. See the text of the question.
# Note: This modifies classes in-place but (probably) does not modify functions in-place;
# this is not a considered design decision; it is just the easiest thing to do in a very
# basic example like this.
def do_something (class_or_function: typing.Union[class_, function]):
if isinstance(class_or_function, class_):
for name in class_or_function.__dict__:
if not is_double_underscore_name(name):
object = class_or_function.__dict__[name]
if isinstance(object, function):
class_or_function.__dict__[name] = do_something(object)
return class_or_function
else:
... # return the function, modified in some way
答案 0 :(得分:3)
类是type
类型的实例。
功能属于types.FunctionType
或types.BuiltinFunctionType
类型。
方法的类型为types.MethodType
或types.BuiltinMethodType
。
types
已经成为Python的一部分......很长一段时间。