javascript - 执行 javascript 更改 webelement 时找不到变量错误

Question

当我执行以下命令来更改 webelement 文本值时，出现“cant error variable : e”

sel=webdriver.PhantomJS()
sel.get=('http://stackoverflow.com/questions?pagesize=50&sort=newest')
elements=sel.find_elements_by_xpath('//a[@href="/questions/31762200/traversing-through-nsset-is-slower-than-traversing-nsarray"]')
e=elements[0]
sel.execute_script(" e.text='testing' ")


WebDriverException: Message: {"errorMessage":"Can't find variable: e","request":
{"headers":{"Accept":"application/json","Accept-Encoding":"identity","Connection":"close","Content-Length":"95","Content-Type":"application/
json;charset=UTF-8","Host":"127.0.0.1:38324","User-Agent":"Python-urllib/2.7"},"httpVersion":"1.1","method":"POST","post":"{\"sessionId\": \"255a60c0-384f-11e5-
b643-5d2e25d3f62d\", \"args\": [], \"script\": \"e.text='testing'\"}","url":"/execute","urlParsed":{"anchor":"","query":"","file":"execute","directory":"/","path":"/
execute","relative":"/execute","port":"","host":"","password":"","user":"","userInfo":"","authority":"","protocol":"","source":"/execute","queryKey":{},"chunks":["execute"]},"urlOriginal":"/
session/255a60c0-384f-11e5-b643-5d2e25d3f62d/execute"}}

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Answer 1

python 代码和 javascript 代码不共享变量。

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通过将附加参数传递给 Webdriver.execute_script，将变量 e 从 Python 端传递给 javascript .在 javascript 代码中，您可以使用 arguments 数组访问参数:

sel.execute_script("arguments[0].text = 'testing'", e)