使用“请求-HTML”库获取交易价格时遇到麻烦

我在 python中编写了一个脚本,以便从 javascript呈现的网页中获取最后一笔交易的价格.如果我选择使用硒,我可以获得内容.我的目标是不使用任何浏览器模拟器,如SELEnium或其他东西,因为最新版本的 Requests-HTML应该能够解析javascript加密内容.但是,我无法顺利完成任务.当我运行脚本时,我收到以下错误.任何有关这方面的帮助将受到高度赞赏.

地址：webpage_link

我尝试过的脚本：

import requests_html

with requests_html.HTMLSession() as session:
    r = session.get('https://www.gdax.com/trade/LTC-EUR')
    js = r.html.render()
    item = js.find('.MarkeTinfo_market-num_1lAXs',first=TruE).text
    print(item)

这是完整的追溯：

Exception in callBACk NavigatorWatcher.waitForNavigation.<locals>.watchdog_cb(<Task finishe...> result=None>) at C:\Users\ar\ApPDAta\Local\Programs\Python\Python36-32\lib\site-packages\pyppeteer\navigator_watcher.py:49
handle: <Handle NavigatorWatcher.waitForNavigation.<locals>.watchdog_cb(<Task finishe...> result=None>) at C:\Users\ar\ApPDAta\Local\Programs\Python\Python36-32\lib\site-packages\pyppeteer\navigator_watcher.py:49>
TraceBACk (most recent call last):
  File "C:\Users\ar\ApPDAta\Local\Programs\Python\Python36-32\lib\asyncio\events.py",line 145,in _run
    self._callBACk(*self._args)
  File "C:\Users\ar\ApPDAta\Local\Programs\Python\Python36-32\lib\site-packages\pyppeteer\navigator_watcher.py",line 52,in watchdog_cb
    self._timeout)
  File "C:\Users\ar\ApPDAta\Local\Programs\Python\Python36-32\lib\site-packages\pyppeteer\navigator_watcher.py",line 40,in _raise_error
    raise error
concurrent.futures._base.TimeoutError: Navigation Timeout Exceeded: 3000 ms exceeded
TraceBACk (most recent call last):
  File "C:\Users\ar\ApPDAta\Local\Programs\Python\Python36-32\experiment.py",line 6,in <module>
    item = js.find('.MarkeTinfo_market-num_1lAXs',first=TruE).text
AttributeError: 'NoneType' object has no attribute 'find'
Error in atexit._run_exitfuncs:
TraceBACk (most recent call last):
  File "C:\Users\ar\ApPDAta\Local\Programs\Python\Python36-32\lib\shutil.py",line 387,in _rmtree_unsafe
    oS.Unlink(full@R_675_8313@
PermissionError: [WinError 5] Access is denied: 'C:\\Users\\ar\\.pyppeteer\\.dev_profile\\tmp1gng46sw\\CrashpadMetrics-active.pma'

我所能找到的价格在页面顶部可以看到这样的177.59 EUR最后交易价格.我希望得到177.59或当前的价格.

Exception in callBACk NavigatorWatcher.waitForNavigation.<locals>.watchdog_cb(<Task finishe...> result=None>) at C:\Users\ar\ApPDAta\Local\Programs\Python\Python36-32\lib\site-packages\pyppeteer\navigator_watcher.py:49
handle: <Handle NavigatorWatcher.waitForNavigation.<locals>.watchdog_cb(<Task finishe...> result=None>) at C:\Users\ar\ApPDAta\Local\Programs\Python\Python36-32\lib\site-packages\pyppeteer\navigator_watcher.py:49>
TraceBACk (most recent call last):
  File "C:\Users\ar\ApPDAta\Local\Programs\Python\Python36-32\lib\asyncio\events.py",in _raise_error
    raise error
concurrent.futures._base.TimeoutError: Navigation Timeout Exceeded: 3000 ms exceeded

r.html.render()
item = r.html.find('.MarkeTinfo_market-num_1lAXs',first=TruE)

r.html.render(timeout=10,sleep=10)

# search for CSS suffixes
suffixes = [r[0] for r in r.html.search_all('MarkeTinfo_market-num_{:w}')]
for suffix in suffixes:
    # for each suffix,find all matching elements with that class
    items = r.html.find('.MarkeTinfo_market-num_{}'.format(suffiX))
    for item in items:
        print(item.text)

169.81 EUR
+
1.01 %
18,420 LTC
169.81 EUR
+
1.01 %
18,420 LTC