comtypes error 'tuple' object has no attribute '__ctypes_from_outparam__'

最近使用comtypes 需要使用到pythoncom功能，可以用
pip install pypiwin32

這樣就會附帶安裝pythoncom了

#2018年更新，這個問題在 comtypes 1.1.4 版中已經被修正了

使用comtypes 有時候會出現

'tuple' object has no attribute '__ctypes_from_outparam__'

將 comtypes 裡的 __init__.py  第 658 行程式碼做些修改可以修正這個bug

路徑大概類似這樣

~python\Lib\site-packages\comtypes\__init__.py

    657             # be iterable.
    658             if len(outargs) == 1:  # rescode is not iterable
--> 659                 return rescode.__ctypes_from_outparam__()
    660 
    661             rescode = list(rescode)

改成

            # be iterable.
            if len(outargs) == 1:  # rescode is not iterable
                try:
                    return rescode.__ctypes_from_outparam__()
                except: #somtimes rescode is tuple
                    return rescode

            rescode = list(rescode)

即可修正

Ref:

https://github.com/enthought/comtypes/issues/87