为了封装模块中的所有函数调用,并通过包装类的
__getattr__
方法访问它,我尝试使用typing
库,但我无法弄清楚如何正确操作。import interface
"""
>>> print(interface.__all__)
['execute_foo_operation', ...]
"""
class InterfaceWrapper(object):
def __init__(self, job_queue):
self.job_queue = job_queue
self.callbacks = []
def __getattr__(self, name):
func = getattr(interface, name)
return functools.partial(self._wrapper, func)
def _wrapper(self, func, *args, **kwargs):
job = func(*args, **kwargs)
self.job_queue.push(job)
for callback in self.callbacks:
callback(job)
return job
def register_callback(self, callback):
self.callbacks.append(callback)
class Operator(object):
def __init__(self, job_queue):
self.interface = InterfaceWrapper(job_queue)
def after_queuing(self):
# do something
def execute_foo_operation(self):
self.interface.register_callback(self.after_queuing)
self.interface.execute_foo_operation() # unresolved attribute
有人能指导我如何使我的代码正常运行吗?
InterfaceWrapper.__getattr__
,我认为很难做到这一点,因为它需要知道func
的参数类型,而我猜每个函数的参数类型都是不同的。 - Zecong Hu