__init__.py 文件源码

def sniff_options(obj):
    options = set()
    # We walk the __wrapped__ chain to collect properties.
    while True:
        if getattr(obj, "__isabstractmethod__", False):
            options.add("abstractmethod")
        if isinstance(obj, classmethod):
            options.add("classmethod")
        if isinstance(obj, staticmethod):
            options.add("staticmethod")
        # if isinstance(obj, property):
        #     options.add("property")
        # Only check for these if we haven't seen any of them yet:
        if not (options & EXCLUSIVE_OPTIONS):
            if inspect.iscoroutinefunction(obj):
                options.add("async")
            # in some versions of Python, isgeneratorfunction returns true for
            # coroutines, so we use elif
            elif inspect.isgeneratorfunction(obj):
                options.add("for")
            if isasyncgenfunction(obj):
                options.add("async-for")
            # Some heuristics to detect when something is a context manager
            if getattr(obj, "__code__", None) in CM_CODES:
                options.add("with")
            if getattr(obj, "__returns_contextmanager__", False):
                options.add("with")
            if getattr(obj, "__returns_acontextmanager__", False):
                options.add("async-with")
        if hasattr(obj, "__wrapped__"):
            obj = obj.__wrapped__
        elif hasattr(obj, "__func__"):  # for staticmethod & classmethod
            obj = obj.__func__
        else:
            break

    return options