我们从Python开源项目中，提取了以下16个代码示例，用于说明如何使用inspect.unwrap()。
def _get_function_source(func): if _PY34: func = inspect.unwrap(func) elif hasattr(func, '__wrapped__'): func = func.__wrapped__ if inspect.isfunction(func): code = func.__code__ return (code.co_filename, code.co_firstlineno) if isinstance(func, functools.partial): return _get_function_source(func.func) if _PY34 and isinstance(func, functools.partialmethod): return _get_function_source(func.func) return None
def unwrap(func, stop=None): # NOTE: implementation is taken from CPython/Lib/inspect.py, Python 3.6 if stop is None: def _is_wrapper(f): return hasattr(f, '__wrapped__') else: def _is_wrapper(f): return hasattr(f, '__wrapped__') and not stop(f) f = func # remember the original func for error reporting memo = {id(f)} # Memoise by id to tolerate non-hashable objects while _is_wrapper(func): func = func.__wrapped__ id_func = id(func) if id_func in memo: raise ValueError('wrapper loop when unwrapping {!r}'.format(f)) memo.add(id_func) return func
def _collect_grammar_rules(func): grammar = [] while func: prodname = func.__name__ unwrapped = inspect.unwrap(func) filename = unwrapped.__code__.co_filename lineno = unwrapped.__code__.co_firstlineno for rule, lineno in zip(func.rules, range(lineno+len(func.rules)-1, 0, -1)): syms = rule.split() if syms[1:2] == [':'] or syms[1:2] == ['::=']: grammar.append((func, filename, lineno, syms[0], syms[2:])) else: grammar.append((func, filename, lineno, prodname, syms)) func = getattr(func, 'next_func', None) return grammar
def _unwrap_func(cls, decorated_func): '''This unwraps a decorated func, returning the inner wrapped func. This may become unnecessary with Python 3.4's inspect.unwrap(). ''' if click is not None: # Workaround for click.command() decorator not setting # __wrapped__ if isinstance(decorated_func, click.Command): return cls._unwrap_func(decorated_func.callback) if hasattr(decorated_func, '__wrapped__'): # Recursion: unwrap more if needed return cls._unwrap_func(decorated_func.__wrapped__) else: # decorated_func isn't actually decorated, no more # unwrapping to do return decorated_func
def get_func_in_module(module: str, qualname: str) -> Callable: """Return the function specified by qualname in module. Raises: NameLookupError if we can't find the named function InvalidTypeError if we the name isn't a function """ func = get_name_in_module(module, qualname) # TODO: Incorrect typeshed stub, stop arg should be optional # https://github.com/python/typeshed/blob/master/stdlib/3/inspect.pyi#L213 func = inspect.unwrap(func) # type: ignore if isinstance(func, types.MethodType): func = func.__func__ elif isinstance(func, property): if func.fget is not None: if (func.fset is None) and (func.fdel is None): func = func.fget else: raise InvalidTypeError( f"Property {module}.{qualname} has setter or deleter.") else: raise InvalidTypeError( f"Property {module}.{qualname} is missing getter") elif not isinstance(func, (types.FunctionType, types.BuiltinFunctionType)): raise InvalidTypeError( f"{module}.{qualname} is of type '{type(func)}', not function.") return func
def _get_function_source(func): if compat.PY34: func = inspect.unwrap(func) elif hasattr(func, '__wrapped__'): func = func.__wrapped__ if inspect.isfunction(func): code = func.__code__ return (code.co_filename, code.co_firstlineno) if isinstance(func, functools.partial): return _get_function_source(func.func) if compat.PY34 and isinstance(func, functools.partialmethod): return _get_function_source(func.func) return None
def test_unwrap_one(self): def func(a, b): return a + b wrapper = functools.lru_cache(maxsize=20)(func) self.assertIs(inspect.unwrap(wrapper), func)
def test_unwrap_several(self): def func(a, b): return a + b wrapper = func for __ in range(10): @functools.wraps(wrapper) def wrapper(): pass self.assertIsNot(wrapper.__wrapped__, func) self.assertIs(inspect.unwrap(wrapper), func)
def test_stop(self): def func1(a, b): return a + b @functools.wraps(func1) def func2(): pass @functools.wraps(func2) def wrapper(): pass func2.stop_here = 1 unwrapped = inspect.unwrap(wrapper, stop=(lambda f: hasattr(f, "stop_here"))) self.assertIs(unwrapped, func2)
def test_cycle(self): def func1(): pass func1.__wrapped__ = func1 with self.assertRaisesRegex(ValueError, 'wrapper loop'): inspect.unwrap(func1) def func2(): pass func2.__wrapped__ = func1 func1.__wrapped__ = func2 with self.assertRaisesRegex(ValueError, 'wrapper loop'): inspect.unwrap(func1) with self.assertRaisesRegex(ValueError, 'wrapper loop'): inspect.unwrap(func2)
