<p>文本为<em>Majors</em>字段的元素位于<code><iframe></code>内，因此您必须：</p>
<ul>
<li><p>诱导<a href="https://stackoverflow.com/questions/59130200/selenium-wait-until-element-is-present-visible-and-interactable/59130336#59130336">WebDriverWait</a>使所需的<em>帧可用，并切换到它</em></p>
</li>
<li><p>诱导<a href="https://stackoverflow.com/questions/52603847/how-to-sleep-webdriver-in-python-for-milliseconds/52607451#52607451">WebDriverWait</a>使所需的<em>元素可单击</em></p>
</li>
<li><p>您可以使用以下任一<a href="https://stackoverflow.com/questions/48369043/official-locator-strategies-for-the-webdriver/48376890#48376890">Locator Strategies</a>：</p>
<ul>
<li><p>使用<code>CSS_SELECTOR</code>：</p>
<pre><code>driver.get('https://www.dukascopy.com/swiss/english/marketwatch/historical/')
WebDriverWait(driver, 20).until(EC.frame_to_be_available_and_switch_to_it((By.CSS_SELECTOR,"iframe[src*='freeserv.dukascopy.com/2.0/?path=historical_data_feed']")))
driver.execute_script("return arguments[0].scrollIntoView(true);", WebDriverWait(driver, 20).until(EC.visibility_of_element_located((By.XPATH, "//div[text()='Instrument']"))))
WebDriverWait(driver, 20).until(EC.element_to_be_clickable((By.CSS_SELECTOR, "li[data-group='FX_MAJORS'][data-parent='FX']"))).click()
</code></pre>
</li>
<li><p>使用<code>XPATH</code>：</p>
<pre><code>driver.get('https://www.dukascopy.com/swiss/english/marketwatch/historical/')
WebDriverWait(driver, 10).until(EC.frame_to_be_available_and_switch_to_it((By.XPATH,"//iframe[contains(@src, 'freeserv.dukascopy.com/2.0/?path=historical_data_feed')]")))
driver.execute_script("return arguments[0].scrollIntoView(true);", WebDriverWait(driver, 20).until(EC.visibility_of_element_located((By.XPATH, "//div[text()='Instrument']"))))
WebDriverWait(driver, 20).until(EC.element_to_be_clickable((By.XPATH, "//li[text()='Majors']"))).click()
</code></pre>
</li>
</ul>
</li>
<li><p><strong>注意</strong>：您必须添加以下导入：</p>
<pre><code>from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.common.by import By
from selenium.webdriver.support import expected_conditions as EC
</code></pre>
</li>
<li><p>浏览器快照：</p>
</li>
</ul>
<p><a href="https://i.stack.imgur.com/Fu3JY.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Fu3JY.png" alt="Major"/></a></p>
<hr/>
<h2>参考文献</h2>
<p>您可以在以下内容中找到一些相关讨论：</p>
<ul>
<li><a href="https://stackoverflow.com/questions/53203417/ways-to-deal-with-document-under-iframe">Ways to deal with #document under iframe</a></li>
<li><a href="https://stackoverflow.com/questions/44834358/switch-to-an-iframe-through-selenium-and-python/44847390#44847390">Switch to an iframe through Selenium and python</a></li>
</ul>
