所以我试图捕获Webdriver异常,并且不希望它的回溯污染我的日志.这是一些代码
from selenium.common.exceptions import TimeoutException, WebDriverException
try:
webdriverwait(driver, 10).until(
EC.presence_of_element_located((By.CSS_SELECTOR, '.loading')))
except TimeoutException:
log.msg("Seneium Timeout: {}".format(response.url))
except WebDriverException as e:
log.msg("Selenium Exception: {0} Message: {1}".format("my message", str(e)))
finally:
driver.quit()
但我仍然得到这些:
<full traceback here>
selenium.common.exceptions.WebDriverException: Message: Can not connect to GhostDriver
我究竟做错了什么?
解决方法:
初始化WebDriver实例时,异常会在try / except块之外引发:
driver = webdriver.PhantomJS()
仅供参考,这是在使用GhostDriver启动PhantomJS时发生的,引自source code:
def start(self):
"""
Starts PhantomJS with GhostDriver.
:Exceptions:
- WebDriverException : Raised either when it can't start the service
or when it can't connect to the service
"""
try:
self.process = subprocess.Popen(self.service_args, stdin=subprocess.PIPE,
close_fds=platform.system() != 'Windows',
stdout=self._log, stderr=self._log)
except Exception as e:
raise WebDriverException("Unable to start phantomjs with ghostdriver.", e)
count = 0
while not utils.is_connectable(self.port):
count += 1
time.sleep(1)
if count == 30:
raise WebDriverException("Can not connect to GhostDriver")
并且,start()是called in WebDriver
‘s constructor (__init__()
method).
换句话说,它启动服务,但无法连接到它.