将 Robot Framework xPath 转换为 Selenium Python 等效项。

Question

I am trying to convert xpath in robot to python code. I wanted the below xpath in Robot to be converted to python code

This works in Robot:

xpath=(//th[@class="picker-switch"])[2]

I have tried in python

self._driver.find_element_by_xpath("//th[@class='picker-switch'][2]")

Which resulted in the following error:

NoSuchElementException: Message: no such element: Unable to locate element: {"method":"xpath","selector":"//th[@class='datepicker-switch'][2]"}

and

self._driver.find_element_by_xpath("//th[@class='picker-switch']")[2]

That caused:

'WebElement' object does not support indexing

Answer 1

当我用括号(...)将 xpath 语句括起来时，它开始工作：

self._driver.find_element_by_xpath("(//th[@class='picker-switch'])[2]").click()

Answer 2

It failed, as what you have put in the first python attempt was not the same xpath as in RF ;).

In the original xpath the expression is surrounded with brackets (expression) , and then the index. Which reads - find all elements matching the expression, and return the second one.

Without the brackets it is - find all th with that class, which are the 2nd child of their parents element - quite different :)

For the record, the corrected second python attempt should be

self._driver.find_elements_by_xpath("//th[@class='picker-switch']")[1]

find_elements_by_xpath will return all elements matching the expression as a list, and [1] will return the 2nd element in that list - python's lists are zero-based (start from index 0), while xpath's - one-based.