我應該如何處理調試NULL COM指針訪問錯誤？

嗨Stack Overflow社區，我應該如何處理調試NULL COM指針訪問錯誤？

我需要爲客戶端自動化專有應用程序。我已經能夠成功運行一些示例代碼here（即pywinauto在記事本上工作）。對於專有應用程序，似乎任何最終的elements_from_uia_array(ptrs_array, cache_enable)調用失敗，特別是針對此應用程序的相同NULL COM指針訪問錯誤。我應該如何解決這個問題？

語境：

環境：Windows 10的Python 3.6.2，pywinauto-0.6.3
觀察：自動化谷歌瀏覽器時，沒有空COM錯誤&記事本

這裏我試圖從WindowsSpecification創建包裝器對象時得到的堆棧跟蹤。任何頂級窗口上的print_control_identifiers()也給我同樣的錯誤。

>>> test = actual_window.child_window(auto_id="_buttonFindStudent",control_type="Button") 
>>> test 
<pywinauto.application.WindowSpecification object at 0x000002277006DC50> 
>>> profit = test.wrapper_object() 
Traceback (most recent call last): 
    File "<pyshell#30>", line 1, in <module> 
profit = test.wrapper_object() 
    File "C:\Users\SK2\AppData\Local\Programs\Python\Python36\lib\site-packages\pywinauto\application.py", line 254, in wrapper_object 
ctrls = self.__resolve_control(self.criteria) 
    File "C:\Users\SK2\AppData\Local\Programs\Python\Python36\lib\site-packages\pywinauto\application.py", line 245, in __resolve_control 
criteria) 
    File "C:\Users\SK2\AppData\Local\Programs\Python\Python36\lib\site-packages\pywinauto\timings.py", line 425, in wait_until_passes 
func_val = func(*args) 
    File "C:\Users\SK2\AppData\Local\Programs\Python\Python36\lib\site-packages\pywinauto\application.py", line 209, in __get_ctrl 
ctrl = self.backend.generic_wrapper_class(findwindows.find_element(**ctrl_criteria)) 
    File "C:\Users\SK2\AppData\Local\Programs\Python\Python36\lib\site-packages\pywinauto\findwindows.py", line 84, in find_element 
elements = find_elements(**kwargs) 
    File "C:\Users\SK2\AppData\Local\Programs\Python\Python36\lib\site-packages\pywinauto\findwindows.py", line 214, in find_elements 
depth=depth) 
    File "C:\Users\SK2\AppData\Local\Programs\Python\Python36\lib\site-packages\pywinauto\uia_element_info.py", line 283, in descendants 
elements = self._get_elements(IUIA().tree_scope["descendants"], cond, cache_enable) 
    File "C:\Users\SK2\AppData\Local\Programs\Python\Python36\lib\site-packages\pywinauto\uia_element_info.py", line 262, in _get_elements 
return elements_from_uia_array(ptrs_array, cache_enable) 
    File "C:\Users\SK2\AppData\Local\Programs\Python\Python36\lib\site-packages\pywinauto\uia_element_info.py", line 48, in elements_from_uia_array 
for n in range(ptrs.Length): 
ValueError: NULL COM pointer access

來源

2017-09-19 AMemberofDollars

類似於這樣的問題：https://github.com/pywinauto/pywinauto/issues/296要儘快修復它（本月）。 –

你可以嘗試從[這個分支]修復（https://github.com/airelil/pywinauto/archive/dev.zip）？ –

將嘗試修復並讓你知道！ – AMemberofDollars

pywinauto==0.6.4修正了這個問題（剛剛發佈在PyPI上）。對不起，等了很久。只需升級它pip install -U pywinauto。

來源

2018-01-21 18:28:33

我應該如何處理調試NULL COM指針訪問錯誤？

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