用老师上课教的封装的截图方法，在APP原生页面可以正常运行，但是切换到H5页面的时候，截图方法会报错
报错信息：
self = <page.main.Main object at 0x000001F69F0FEDA0>, locator = 'xpath'
value = "//*[@class='cmsui-tabBar']//li[@class][2]"
@handle_black
def find(self, locator, value: str = None):
element: WebElement
# 截图
> self.screenshot("a.png")
..\page\base_page.py:38:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
self = <page.main.Main object at 0x000001F69F0FEDA0>, name = 'a.png'
def screenshot(self, name):
> self._driver.save_screenshot(name)
..\page\base_page.py:22:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
self = <appium.webdriver.webdriver.WebDriver (session="61ee47c6-3cc2-4eba-b689-1590922a555a")>
filename = 'a.png'
def save_screenshot(self, filename):
"""
Saves a screenshot of the current window to a PNG image file. Returns
False if there is any IOError, else returns True. Use full paths in
your filename.
:Args:
- filename: The full path you wish to save your screenshot to. This
should end with a `.png` extension.
:Usage:
driver.save_screenshot('/Screenshots/foo.png')
"""
> return self.get_screenshot_as_file(filename)
..\venv\lib\site-packages\selenium\webdriver\remote\webdriver.py:1055:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
self = <appium.webdriver.webdriver.WebDriver (session="61ee47c6-3cc2-4eba-b689-1590922a555a")>
filename = 'a.png'
def get_screenshot_as_file(self, filename):
"""
Saves a screenshot of the current window to a PNG image file. Returns
False if there is any IOError, else returns True. Use full paths in
your filename.
:Args:
- filename: The full path you wish to save your screenshot to. This
should end with a `.png` extension.
:Usage:
driver.get_screenshot_as_file('/Screenshots/foo.png')
"""
if not filename.lower().endswith('.png'):
warnings.warn("name used for saved screenshot does not match file "
"type. It should end with a `.png` extension", UserWarning)
> png = self.get_screenshot_as_png()
..\venv\lib\site-packages\selenium\webdriver\remote\webdriver.py:1032:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
self = <appium.webdriver.webdriver.WebDriver (session="61ee47c6-3cc2-4eba-b689-1590922a555a")>
def get_screenshot_as_png(self):
"""
Gets the screenshot of the current window as a binary data.
:Usage:
driver.get_screenshot_as_png()
"""
> return base64.b64decode(self.get_screenshot_as_base64().encode('ascii'))
E AttributeError: 'NoneType' object has no attribute 'encode'
同时下面还有另外一个报错信息：
> raise exception_class(message, screen, stacktrace)
E selenium.common.exceptions.WebDriverException: Message: An unknown server-side error occurred while processing the command. Original error: chrome not reachable
E (Session info: chrome=52.0.2743.100)
E (Driver info: chromedriver=2.23.409699 (49b0fa931cda1caad0ae15b7d1b68004acd05129),platform=Windows NT 10.0.17763 x86_64)
我开始一直以为我的浏览器驱动有问题，后面发现只要把截图的方法注释掉，脚本就会运行成功，后面那个关于chrome not reachable的错误也没有了。
截图方法（在bese_pege文件里）：
def screenshot(self, name):
self._driver.save_screenshot(name)
截图方法的引用（在bese_pege文件里）：
@handle_black
def find(self, locator, value: str = None):
element: WebElement
# 截图
self.screenshot("a.png")
with open("a.png", "rb") as f:
content = f.read()
allure.attach(content, attachment_type=allure.attachment_type.PNG)
if isinstance(locator, tuple):
element = self._driver.find_element(*locator)
else:
element = self._driver.find_element(locator, value)
return element
切换到H5页面后，只要触发到截图，就会直接报这个错误，想请教下老师，有什么方法可以让截图方法在原生和H5页面都可以正常截图吗？