从下拉菜单中一页接一页地阅读-在第二页找不到下拉菜单

Question

我有个传呼。

我想去每一个页面（为了得到URL）关联的下拉菜单的一个元素从页面的顶部。

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from selenium import webdriver
from selenium.webdriver.common.keys import Keys
from selenium.webdriver.support.ui import Select
import time

driver = webdriver.Firefox()
driver.get("http://www.hillsproducts.com/General.aspx/en-GB/PD/a-d-canine/original/can")
select = Select(driver.find_element_by_xpath("//select[@id='productSpecifier_product']"))
value="2"
select.select_by_value(value)
print(driver.current_url)
time.sleep(10)
value="3"
select.select_by_value(value)
print(driver.current_url)

有些事我不明白。我得到的错误如下：

回溯（最近的调用为last）：文件“/users/luigi/desktop/selenium_turption.py”，第19行，在select.select_by_value（值）文件“/library/frameworks/python.framework/versions/3.4/lib/python3.4/site-packages/selenium-2.46.1-py3.4.eg/selenium/webdriver/support/select.py”，第76行，在select_by_value Selenium-2.46.1-py3.4.egg/selenium/webdriver/remote/webelement.py“，第485行，在find_elements{”using“：by,”value“：value}）['value']文件”/library/frameworks/python.framework/versions/3.4/lib/python3.4/site-packages/selenium-2.46.1-py3.4.egg/selenium/webdriver/remote/webelement.py“，第447行，在_execute返回6.1-py3.4.egg/selenium/webdriver/remote/webdriver.py”，第193行，在execute self.error_handler.check_response中esponse）文件“/library/frameworks/python.framework/versions/3.4/lib/python3.4/site-packages/selenium-2.46.1-py3.4.egg/selenium/webdriver/remote/errorhandler.py”第181行，在check_response引发exception_class（message,screen,stacktrace）selenium.common.exceptions.staleelementreference:message：screme：staleelementreference:var/folders/8s/hl6bx6z91yq6r81hpqg995rw0000gn/t/tmpr37ozu9l/extensions/[e-mail]/components/driver-components:8942)在firefoxdriver.prototype.findelementsinternal_（文件：//文件：///var/folders/8s/hl6bx6z91yq6r81hpqg995rw0000gn/t/tmpr37ozu9l/extensions/[e-mail]/components/driver-component.js:10706)在[e-mail]/components/command-processor.js:12648)在delayedcommand.prototype.execute/<（文件：///var/folders/8s/hl6bx6z91yq6r81hpqg995rw0000gn/t/tmpr37ozu9l/extensions/[e-mail]/components/command-processor.js:12590)

任何想法都将不胜感激！

亚历克斯回答后的更新：

Traceback（最近的调用为last）：文件“/users/luigi/desktop/selenium_turption.py”，第18行，在if index>=len（select.options）中：文件“/library/frameworks/python.framework/versions/3.4/lib/python3.4/site-packages/selenium-2.46.1-py3.4.eg/selenium/webdriver/select.py”，第46行，在options return py3.4.egg/selenium/webdriver/remote/webelement.py“，第485行，在find_elements{”using“：by,”value“：value}）['value']文件”/library/frameworks/python.framework/versions/3.4/lib/python3.4/site-packages/selenium-2.46.1-py3.4.egg/selenium/webdriver/remote/webelement.py“，第447行，在_execute返回self._parent.execute（enium/webdriver/remote/webdriver.py”，第193行，在execute self.error_handler.check_response（response）文件“/library/frameworks/python.framework/versions/3.4/lib/python3.4/site-packages/selenium-2.46.1-py3.4.egg/selenium/webdriver/remote/errorhandler.py”第181行，在check_response引发exception_class（message,screen,stacktrace）selenium.common.exceptions.staleElementReferenceException：message,screen,stacktrace）/folders/8s/hl6bx6z91yq6r81hpqg995rw0000gn/t/tmpzrilw39c/extensions/[e-mail]/components/driver-component.js:8942)在firefoxdriver.prototype.findelementsinternal_（文件：///：///var/folders/8s/hl6bx6z91yq6r81hpqg995rw0000gn/t/tmpzrilw39c/extensions/[e-mail]/components/driver-component.js:10706)在delayedcommand.prototype.executeinternal_h(fil:///var/folders/8s/hl6bx6z91yq6r81hpqg995rw0000gn/t/tmpzrilw39c/extensions/fxdride.com/components/components/components/components/components.js:12643)在delayedcommand.prototype.executeinternal_（文件[e-mail]/components/command-processor.js:12648)在delayedcommand.prototype.execute/<（文件：///var/folders/8s/hl6bx6z91yq6r81hpqg995rw0000gn/t/tmpzrilw39c/extensions/[e-mail]/components/command-processor.js:12590)

Answer 1

每次加载新页时，必须重新实例化select():

from selenium import webdriver
from selenium.webdriver.support.ui import Select


driver = webdriver.Firefox()
driver.get("http://www.hillsproducts.com/General.aspx/en-GB/PD/a-d-canine/original/can")

index = 0
while True:
    select = Select(driver.find_element_by_id("productSpecifier_product"))

    # exit the loop if all the options were seen
    if index >= len(select.options):
        break

    select.select_by_index(index)
    print(driver.current_url)

    index += 1