python-3.x - 在里面执行带有 Selenium 的脚本 doesn't work, but when doing in Console it does</a></h1> <div class="ml12 aside-cta flex--item print:d-none sm:ml0 sm:mb12 sm:order-first sm:as-end"> <a href="https://stackoverflow.com/questions/ask" target="_blank" class="ws-nowrap s-btn s-btnprimary">问问题</a></div> </div> <div class="d-flex fw-wrap pb8 mb16 bb bc-black-075"> <div class="flex--item ws-nowrap mr16 mb8"> <span class="fc-light mr2"></span> </div> <div class="flex--item ws-nowrap mr16 mb8" title="2022-04-17 15:46:40Z"> <span class="fc-light mr2">问问题</span> <time itemprop="dateCreated" datetime="2019-02-13T15:31:24.917">2019-02-13T15:31:24.917</time> </div> <div class="flex--item ws-nowrap mb8" title="Viewed 6 times"> <span class="fc-light mr2"></span> 132 次 </div> </div> <div id="mainbar" role="main" aria-label="question and answers"> <div class="question" data-questionid="4" data-position-on-page="0" data-score="763" id="question"> <div class="post-layout"> <div class="votecell post-layout--left"> <div class="js-voting-container d-flex jc-center fd-column ai-stretch gs4 fc-black-200" data-post-id="4"> <button class="js-vote-up-btn flex--item s-btn s-btnunset c-pointer " data-controller="s-tooltip" data-s-tooltip-placement="right" aria-pressed="false" aria-label="Up vote" data-selected-classes="fc-theme-primary" data-unselected-classes="" aria-describedby="--stacks-s-tooltip-peeufs8c"> <svg aria-hidden="true" class="svg-icon iconArrowUpLg" width="36" height="36" viewBox="0 0 36 36"><path d="M2 25h32L18 9 2 25Z"></path></svg> </button> <div id="--stacks-s-tooltip-peeufs8c" class="s-popover s-popovertooltip pe-none" aria-hidden="true" role="tooltip">This question shows research effort; it is useful and clear<div class="s-popover--arrow"></div></div> <div class="js-vote-count flex--item d-flex fd-column ai-center fc-black-500 fs-title" itemprop="upvoteCount" data-value=""> 1 </div> <button class="js-vote-down-btn flex--item s-btn s-btnunset c-pointer " data-controller="s-tooltip" data-s-tooltip-placement="right" aria-pressed="false" aria-label="Down vote" data-selected-classes="fc-theme-primary" data-unselected-classes="" aria-describedby="--stacks-s-tooltip-04106eqn"> <svg aria-hidden="true" class="svg-icon iconArrowDownLg" width="36" height="36" viewBox="0 0 36 36"><path d="M2 11h32L18 27 2 11Z"></path></svg> </button><div id="--stacks-s-tooltip-04106eqn" class="s-popover s-popovertooltip pe-none" aria-hidden="true" role="tooltip">This question does not show any research effort; it is unclear or not useful<div class="s-popover--arrow"></div></div> <div id="--stacks-s-tooltip-tgvwendx" class="s-popover s-popovertooltip pe-none" aria-hidden="true" role="tooltip">Bookmark this question.<div class="s-popover--arrow"></div></div> <a class="js-post-issue flex--item s-btn s-btnunset c-pointer py6 mx-auto" data-shortcut="T" data-ks-title="timeline" data-controller="s-tooltip" data-s-tooltip-placement="right" aria-label="Timeline" aria-describedby="--stacks-s-tooltip-abwmy15k"><svg aria-hidden="true" class="mln2 mr0 svg-icon iconHistory" width="19" height="18" viewBox="0 0 19 18"><path d="M3 9a8 8 0 1 1 3.73 6.77L8.2 14.3A6 6 0 1 0 5 9l3.01-.01-4 4-4-4h3L3 9Zm7-4h1.01L11 9.36l3.22 2.1-.6.93L10 10V5Z"></path></svg></a><div id="--stacks-s-tooltip-abwmy15k" class="s-popover s-popovertooltip pe-none" aria-hidden="true" role="tooltip">Show activity on this post.<div class="s-popover--arrow"></div></div> </div> </div> <div class="postcell post-layout--right"> <div class="s-prose js-post-body" itemprop="text"> <p>I'm automating a service with Selenium, and the website I need to access uses iframes tags, and I need to alter the value of some elements inside this tag.</p>

<p>I was using the Edge WebDriver, but I changed to Chrome because I thought it'd solve the problem, and unfortunately, it didn't, so I don't think it had anything to do with the Driver, but I'd rather keep with Chrome, if possible.</p>

<p>This is the line that simulates the script:</p>

<pre><code>gc.execute_script("""document.evaluate('//[@id="QRYSELECT_WRK_QRYSEARCHTEXT254"]', document, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue.setAttribute('value','foo')""")
</code></pre>

<p>And it raises me an exception about null pointers, but basically, it's saying that the browser couldn't find this element, and, therefore, couldn't change its value.</p>

<p>Ironically, when I open the console and write the following command (wich is the same script above):</p>

<pre><code>document.evaluate('//[@id="QRYSELECT_WRK_QRYSEARCHTEXT254"]', document, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue.setAttribute('value','foo')
</code></pre>

<p>It works.</p>

<p>Here's the traceback to the error when I call execute_script from gc:</p>

<pre><code>Traceback (most recent call last):
 File "<pyshell#12>", line 1, in <module>
 gc.execute_script("""document.evaluate('//[@id="QRYSELECT_WRK_QRYSEARCHTEXT254"]', document, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue.setAttribute('value','CEL_ADMITIDOS')""")
 File "C:\Program Files\Python36\lib\site-packages\selenium\webdriver\support\event_firing_webdriver.py", line 88, in execute_script
 return self._dispatch("execute_script", (script, self._driver), "execute_script", unwrapped_args)
 File "C:\Program Files\Python36\lib\site-packages\selenium\webdriver\support\event_firing_webdriver.py", line 160, in _dispatch
 raise e
 File "C:\Program Files\Python36\lib\site-packages\selenium\webdriver\support\event_firing_webdriver.py", line 157, in _dispatch
 result = getattr(self._driver, d_call)(d_args)
 File "C:\Program Files\Python36\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 636, in execute_script
 'args': converted_args})['value']
 File "C:\Program Files\Python36\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 321, in execute
 self.error_handler.check_response(response)
 File "C:\Program Files\Python36\lib\site-packages\selenium\webdriver\remote\errorhandler.py", line 242, in check_response
 raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.WebDriverException: Message: unknown error: Cannot read property 'setAttribute' of null
 (Session info: chrome=71.0.3578.98)
 (Driver info: chromedriver=71.0.3578.137 (86ee722808adfe9e3c92e6e8ea746ade08423c7e),platform=Windows NT 10.0.17134 x86_64)
</code></pre>

<p>So I guess it's probably something related to permissions...? But I don't know, it's quite weird to get two different results to the same script, isn't it?</p>

<p>Thanks!</p>
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