So I went through the documentation and was trying to screenshot an element using
wd = webdriver.Chrome(chrome_path, chrome_options=options)
url = "https://results.vtu.ac.in/AS_CBCS/index.php"
wd.get(url)
img = wd.find_element_by_xpath('//img[@alt="CAPTCHA code"]')
img.screenshot('foo.png')
But I was getting error :
WebDriverException: Message: unknown command: session/64908e933eb1a91d71fe794e239f1687/element/0.8903743608717787-2/screenshot
WebDriverException Traceback (most recent call last)
<ipython-input-41-4474be757d45> in <module>()
10
11
---> 12 img.screenshot('foo.png')
c:\users\himanshu poddar\appdata\local\programs\python\python36-32\lib\site-packages\selenium\webdriver\remote\webelement.py in screenshot(self, filename)
451 warnings.warn("name used for saved screenshot does not match file "
452 "type. It should end with a `.png` extension", UserWarning)
--> 453 png = self.screenshot_as_png
454 try:
455 with open(filename, 'wb') as f:
c:\users\himanshu poddar\appdata\local\programs\python\python36-32\lib\site-packages\selenium\webdriver\remote\webelement.py in screenshot_as_png(self)
433 element_png = element.screenshot_as_png
434 """
--> 435 return base64.b64decode(self.screenshot_as_base64.encode('ascii'))
436
437 def screenshot(self, filename):
c:\users\himanshu poddar\appdata\local\programs\python\python36-32\lib\site-packages\selenium\webdriver\remote\webelement.py in screenshot_as_base64(self)
423 img_b64 = element.screenshot_as_base64
424 """
--> 425 return self._execute(Command.ELEMENT_SCREENSHOT)['value']
426
427 @property
c:\users\himanshu poddar\appdata\local\programs\python\python36-32\lib\site-packages\selenium\webdriver\remote\webelement.py in _execute(self, command, params)
499 params = {}
500 params['id'] = self._id
--> 501 return self._parent.execute(command, params)
502
503 def find_element(self, by=By.ID, value=None):
c:\users\himanshu poddar\appdata\local\programs\python\python36-32\lib\site-packages\selenium\webdriver\remote\webdriver.py in execute(self, driver_command, params)
309 response = self.command_executor.execute(driver_command, params)
310 if response:
--> 311 self.error_handler.check_response(response)
312 response['value'] = self._unwrap_value(
313 response.get('value', None))
c:\users\himanshu poddar\appdata\local\programs\python\python36-32\lib\site-packages\selenium\webdriver\remote\errorhandler.py in check_response(self, response)
206 if exception_class == ErrorInResponseException:
207 raise exception_class(response, value)
--> 208 raise exception_class(value)
209 if message == "" and 'message' in value:
210 message = value['message']
WebDriverException: Message: unknown command: session/7446082ee2eab255d16e7ac489d4b9b1/element/0.7847029784212665-2/screenshot
s.screenshot('screenshot.png')
---------------------------------------------------------------------------
WebDriverException Traceback (most recent call last)
<ipython-input-29-53a118d5bd49> in <module>()
----> 1 s.screenshot('screenshot.png')
c:\users\himanshu poddar\appdata\local\programs\python\python36-32\lib\site-packages\selenium\webdriver\remote\webelement.py in screenshot(self, filename)
451 warnings.warn("name used for saved screenshot does not match file "
452 "type. It should end with a `.png` extension", UserWarning)
--> 453 png = self.screenshot_as_png
454 try:
455 with open(filename, 'wb') as f:
c:\users\himanshu poddar\appdata\local\programs\python\python36-32\lib\site-packages\selenium\webdriver\remote\webelement.py in screenshot_as_png(self)
433 element_png = element.screenshot_as_png
434 """
--> 435 return base64.b64decode(self.screenshot_as_base64.encode('ascii'))
436
437 def screenshot(self, filename):
c:\users\himanshu poddar\appdata\local\programs\python\python36-32\lib\site-packages\selenium\webdriver\remote\webelement.py in screenshot_as_base64(self)
423 img_b64 = element.screenshot_as_base64
424 """
--> 425 return self._execute(Command.ELEMENT_SCREENSHOT)['value']
426
427 @property
c:\users\himanshu poddar\appdata\local\programs\python\python36-32\lib\site-packages\selenium\webdriver\remote\webelement.py in _execute(self, command, params)
499 params = {}
500 params['id'] = self._id
--> 501 return self._parent.execute(command, params)
502
503 def find_element(self, by=By.ID, value=None):
c:\users\himanshu poddar\appdata\local\programs\python\python36-32\lib\site-packages\selenium\webdriver\remote\webdriver.py in execute(self, driver_command, params)
309 response = self.command_executor.execute(driver_command, params)
310 if response:
--> 311 self.error_handler.check_response(response)
312 response['value'] = self._unwrap_value(
313 response.get('value', None))
c:\users\himanshu poddar\appdata\local\programs\python\python36-32\lib\site-packages\selenium\webdriver\remote\errorhandler.py in check_response(self, response)
206 if exception_class == ErrorInResponseException:
207 raise exception_class(response, value)
--> 208 raise exception_class(value)
209 if message == "" and 'message' in value:
210 message = value['message']
WebDriverException: Message: unknown command: session/64908e933eb1a91d71fe794e239f1687/element/0.8903743608717787-2/screenshot
Chrome version : 85.0.4183.121 (Official Build) (64-bit)
Chrome driver version : 2.38.552522
So installing and updating my chrome driver version to (85.X.X.X) solved my issue.