我一直在为同样的问题苦苦挣扎，但现在我已经找到了一个对我有用的解决方案。
我创建了一个类 ComWrapper，我将 Excel COM 对象包装在其中。它会自动包装每个嵌套对象并在 ComWrapper 中调用，并在它们用作函数调用的参数或对包装对象的赋值时将它们解包。包装器通过捕获“呼叫被被呼叫者拒绝”异常并重试呼叫直到达到顶部定义的超时来工作。如果达到超时，异常最终会被抛出到包装对象之外。
对包装对象的函数调用由函数 _com_call_wrapper 自动包装，这就是神奇之处。
要使其工作，只需使用 ComWrapper 包装来自 Dispatch 的 com 对象，然后像往常一样使用它，就像在代码底部一样。如有问题请评论。
import win32com.client
from pywintypes import com_error
import time
import logging
_DELAY = 0.05 # seconds
_TIMEOUT = 60.0 # seconds
def _com_call_wrapper(f, *args, **kwargs):
"""
COMWrapper support function.
Repeats calls when 'Call was rejected by callee.' exception occurs.
"""
# Unwrap inputs
args = [arg._wrapped_object if isinstance(arg, ComWrapper) else arg for arg in args]
kwargs = dict([(key, value._wrapped_object)
if isinstance(value, ComWrapper)
else (key, value)
for key, value in dict(kwargs).items()])
start_time = None
while True:
try:
result = f(*args, **kwargs)
except com_error as e:
if e.strerror == 'Call was rejected by callee.':
if start_time is None:
start_time = time.time()
logging.warning('Call was rejected by callee.')
elif time.time() - start_time >= _TIMEOUT:
raise
time.sleep(_DELAY)
continue
raise
break
if isinstance(result, win32com.client.CDispatch) or callable(result):
return ComWrapper(result)
return result
class ComWrapper(object):
"""
Class to wrap COM objects to repeat calls when 'Call was rejected by callee.' exception occurs.
"""
def __init__(self, wrapped_object):
assert isinstance(wrapped_object, win32com.client.CDispatch) or callable(wrapped_object)
self.__dict__['_wrapped_object'] = wrapped_object
def __getattr__(self, item):
return _com_call_wrapper(self._wrapped_object.__getattr__, item)
def __getitem__(self, item):
return _com_call_wrapper(self._wrapped_object.__getitem__, item)
def __setattr__(self, key, value):
_com_call_wrapper(self._wrapped_object.__setattr__, key, value)
def __setitem__(self, key, value):
_com_call_wrapper(self._wrapped_object.__setitem__, key, value)
def __call__(self, *args, **kwargs):
return _com_call_wrapper(self._wrapped_object.__call__, *args, **kwargs)
def __repr__(self):
return 'ComWrapper<{}>'.format(repr(self._wrapped_object))
_xl = win32com.client.dynamic.Dispatch('Excel.Application')
xl = ComWrapper(_xl)
# Do stuff with xl instead of _xl, and calls will be attempted until the timeout is
# reached if "Call was rejected by callee."-exceptions are thrown.
我在这里对一个较新的问题给出了相同的答案：
https://stackoverflow.com/a/55892457/2828033