如何使用python3和selenium拍摄元素的屏幕截图

问题描述

我想截取该元素的屏幕截图.我尝试使用下面提到的代码:

I want to take screenshot of the element.I tried with below mentioned code:

ElementIs=driver.find_element_by_xpath(".//body/img")
ElementIs.screenshot('abc.jpg')

但出现错误:

File "C:\Python34\lib\site-packages\selenium-2.47.1-y3.4.egg\selenium\webdriver\remote\webelement.py", line 448, in _execute   return self._parent.execute(command, params)
File "C:\Python34\lib\site-packages\selenium-2.47.1-y3.4.egg\selenium\webdriver\remote\webdriver.py", line 196, in execute self.error_handler.check_response(response)
File "C:\Python34\lib\site-packages\selenium-2.47.1-py3.4.egg\selenium\webdriver\remote\errorhandler.py", line 102, in check_responsevalue = json.loads(value_json)
File "C:\Python34\lib\json\__init__.py", line 318, in loads   return _default_decoder.decode(s)
File "C:\Python34\lib\json\decoder.py", line 343, in decode   obj, end = self.raw_decode(s, idx=_w(s, 0).end())
File "C:\Python34\lib\json\decoder.py", line 361, in raw_decode raise ValueError(errmsg("Expecting value", s, err.value)) from None ValueError: Expecting value: line 1 column 1 (char 0)

推荐答案

几个问题:

1. find_elements_by_xpath返回一个列表，您不能在列表上请求屏幕截图.您是说find_element_by_xpath吗?
2. 在任何情况下，除Microsoft Edge以外，没有WebDriver实际上实现基于元素的屏幕截图.您必须生成一个完整的窗口截图并将其裁剪.

1. find_elements_by_xpath returns a list, and you can't request a screenshot on a list. Did you mean find_element_by_xpath?
2. In any case, with the exception of Microsoft Edge, no WebDriver actually implements element-based screenshots. You have to generate a full-window screenshot and crop it.

有关该背景的更多背景信息和解决方法，请参见我之前的答案.

See my earlier answer on this topic for more background and workarounds.

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