瀏覽器強制退出時Webdriver無法捕捉異常（python）

Question

我有一系列的網頁測試。爲此，我使用Webdriver，並嘗試檢測一會兒，例如，當瀏覽器（Firefox）被迫在gui中退出時。當它發生時，我會得到一個非常漫長而又醜陋的回溯。

主程序在單獨的線程中執行測試套件。例如此代碼：

def urlopen(self, url): 
    ''' Opens browser driver and redirects it to specified url addresss. It web driver 
    is not initialized, it tries to initialize it at first. 
    ''' 
    # check webdriver initialization, if broken or not initialized, can be fixed 

    try: 
     self.redirectToBlank(self.driver); 
    except (urllib.error.URLError, AttributeError): # User closed web driver or is None 

     try: 
      self.initDriver() 
     except: 
      raise 

    # !! this is the moment, when I close the browser window 

    # if there is a problem with URL loading, it cannot be reapaired 
    try: 
     self._driver.get(url); 
    except: 
     print("Webdriver crashed or was forced to quit!", file=sys.stderr) 

此方法用於打開瀏覽器。 initDriver方法來初始化self._driver，這是webdriver.Firefox

Exception in thread Thread-2: 
Traceback (most recent call last): 
    File "c:\Users\david\workspace\tester\sdi\testing.py", line 165, in urlopen 
    self._driver.get(url); 
    File "c:\Python33\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 176, in get 
    self.execute(Command.GET, {'url': url}) 
    File "c:\Python33\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 162, in execute 
    response = self.command_executor.execute(driver_command, params) 
    File "c:\Python33\lib\site-packages\selenium\webdriver\remote\remote_connection.py", line 355, in execute 
    return self._request(url, method=command_info[0], data=data) 
    File "c:\Python33\lib\site-packages\selenium\webdriver\remote\remote_connection.py", line 402, in _request 
    response = opener.open(request) 
    File "c:\Python33\lib\urllib\request.py", line 469, in open 
    response = self._open(req, data) 
    File "c:\Python33\lib\urllib\request.py", line 487, in _open 
    '_open', req) 
    File "c:\Python33\lib\urllib\request.py", line 447, in _call_chain 
    result = func(*args) 
    File "c:\Python33\lib\urllib\request.py", line 1268, in http_open 
    return self.do_open(http.client.HTTPConnection, req) 
    File "c:\Python33\lib\urllib\request.py", line 1253, in do_open 
    r = h.getresponse() 
    File "c:\Python33\lib\http\client.py", line 1143, in getresponse 
    response.begin() 
    File "c:\Python33\lib\http\client.py", line 354, in begin 
    version, status, reason = self._read_status() 
    File "c:\Python33\lib\http\client.py", line 324, in _read_status 
    raise BadStatusLine(line) 
http.client.BadStatusLine: '' 

During handling of the above exception, another exception occurred: 

Traceback (most recent call last): 
    File "c:\Python33\lib\threading.py", line 637, in _bootstrap_inner 
    self.run() 
    File "c:\Python33\lib\threading.py", line 594, in run 
    self._target(*self._args, **self._kwargs) 
    File "c:\Users\david\workspace\tester\sdi\testing.py", line 361, in runFromStart 
    self._run() 
    File "c:\Users\david\workspace\tester\sdi\testing.py", line 369, in _run 
    self.units[0]() # run self.test_openBrowser() 
    File "c:\Users\david\workspace\tester\sdi\testing.py", line 418, in test_openBrowser 
    result = self.webtester.urlopen(self.url) 
    File "c:\Users\david\workspace\tester\sdi\testing.py", line 168, in urlopen 
    log.warn("Webdriver crashed or was forced to quit!", file=sys.stderr) 
    File "c:\Python33\lib\logging\__init__.py", line 1778, in warn 
    warning(msg, *args, **kwargs) 
    File "c:\Python33\lib\logging\__init__.py", line 1773, in warning 
    root.warning(msg, *args, **kwargs) 
    File "c:\Python33\lib\logging\__init__.py", line 1244, in warning 
    self._log(WARNING, msg, args, **kwargs) 
TypeError: _log() got an unexpected keyword argument 'file' 

一個實例我不太明白，爲什麼try-except沒有發現任何異常，這被拋出。我認爲第一個異常是相關的，但是如果您需要回溯的第二部分中提到的方法代碼，我會添加它。

謝謝你的任何建議！

Answer 1

1日回溯：

File "c:\Users\david\workspace\tester\sdi\testing.py", line 165, in urlopen 
    self._driver.get(url); 

第二回溯：

File "c:\Users\david\workspace\tester\sdi\testing.py", line 361, in runFromStart 
    self._run() 
... 
File "c:\Users\david\workspace\tester\sdi\testing.py", line 168, in urlopen 
    log.warn("Webdriver crashed or was forced to quit!", file=sys.stderr) 

您try-except有記錄的語句有問題。

但是我不認爲你可以從另一個線程捕獲異常，你必須在它自己的線程中捕獲它，例如使用消息隊列通知主線程。