Question

我想去一个网站。在那里搜索一个关键字，并在搜索结果中找到HP产品的一些细节。这是我的代码，没有错误但也没有输出。有时我也会得到StaleElementException。

from selenium.webdriver.common.keys import Keys
from selenium.webdriver.support.ui import WebDriverWait as wait
from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.common.by import By

from selenium import webdriver


driver = webdriver.Chrome( "C:\All\chromedriver_win32\chromedriver.exe" )
driver.get('https://www.insight.com/en_US/search.html')
driver.find_element_by_id("search-tab-banner-box-input").send_keys("printer")
wait( driver, 10 ).until( EC.visibility_of_element_located( (By.ID, "search-tab-banner-box-input") ) ).send_keys(Keys.ENTER )
wait( driver, 10 ).until( EC.visibility_of_element_located( (By.ID, "search-tab-banner-box-input") ) ).send_keys(Keys.ESCAPE )
items_count = 0

while True:
 try:
  items = driver.find_elements_by_class_name("prod-section-container")

  for index, item in enumerate( items ):
      if 'HP'in item.text:
          print(index, item.text, item.find_element_by_class_name('prod-part-number show-for-medium-up'))

  items_count += len( items )
 except:
  break

  try:
        driver.find_element_by_xpath( '//div[@class="next-btn"]/a' ).click()
  except:
      break

谁能告诉我哪里出错？

Answer 1

find_element_by_class_name('prod-part-number')（而不是find_element_by_class_name('prod-part-number show-for-medium-up')）。

>>> item = items[0]
>>> item
<selenium.webdriver.remote.webelement.WebElement (session="f81b46ea9715f98e1eaf6e35ae62f601", element="0.9138180044548743-2")>
>>> item.text
'HP LaserJet Enterprise M506n - printer - monochrome - laser\nInsight Part # : F2A68A#BGJ\nMfr Part #: F2A68A#BGJ\n1 year warranty\nAdd to My Compare List\nCompare Similar\nList priceUSD $649.99\n3,710 in stock\nAdd to Cart'
>>> 
>>> item.find_element_by_class_name('prod-part-number show-for-medium-up')
Traceback (most recent call last):
  File "<interactive input>", line 1, in <module>
  File "C:\Python34\lib\site-packages\selenium\webdriver\remote\webelement.py", line 291, in find_element_by_class_name
    return self.find_element(by=By.CLASS_NAME, value=name)
  File "C:\Python34\lib\site-packages\selenium\webdriver\remote\webelement.py", line 511, in find_element
    {"using": by, "value": value})['value']
  File "C:\Python34\lib\site-packages\selenium\webdriver\remote\webelement.py", line 494, in _execute
    return self._parent.execute(command, params)
  File "C:\Python34\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 236, in execute
    self.error_handler.check_response(response)
  File "C:\Python34\lib\site-packages\selenium\webdriver\remote\errorhandler.py", line 192, in check_response
    raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.InvalidSelectorException: Message: invalid selector: Compound class names not permitted
  (Session info: chrome=59.0.3071.115)
  (Driver info: chromedriver=2.30.477700 (0057494ad8732195794a7b32078424f92a5fce41),platform=Windows NT 10.0.15063 x86_64)

>>> item.find_element_by_class_name('prod-part-number')
<selenium.webdriver.remote.webelement.WebElement (session="f81b46ea9715f98e1eaf6e35ae62f601", element="0.9138180044548743-12")>
>>> item.find_element_by_class_name('prod-part-number').text
'Insight Part # : F2A68A#BGJ\nMfr Part #: F2A68A#BGJ'

在selenium python中自动执行搜索过程没有错误但没有输出

1 个答案: