Question

我正在尝试以编程方式选择网站中的货币：http://www.asos.com/asos/asos-skinny-chinos-in-dark-khaki/prd/5542109

但是它对我有些问题，我正在使用以下代码：

def set_currency(text):
    one = WebDriverWait(driver1, 10).until(EC.visibility_of_element_located((By.CLASS_NAME, "selected-currency")))
    one.click()
    select_element = WebDriverWait(driver1, 10).until(EC.visibility_of_element_located((By.ID, "currencyList")))
    select = Select(select_element)
    select.select_by_visible_text(text)

有时它会在此行selenium.common.exceptions.ElementNotVisibleException:中给出此错误：select.select_by_visible_text(text)，但有时它可以正常工作。我使用WebDriverWait直到它可见，所以我无法理解为什么做这个错误。

如果需要，则出现完整错误：

Traceback (most recent call last):
  File "C:/Users/dodob/PycharmProjects/AsosPriceCheckerWindows/currency.py", line 35, in <module>
    set_currency(currency)
  File "C:/Users/dodob/PycharmProjects/AsosPriceCheckerWindows/currency.py", line 18, in set_currency
    select.select_by_visible_text(text)
  File "C:\Python\Python35\lib\site-packages\selenium\webdriver\support\select.py", line 120, in select_by_visible_text
    self._setSelected(opt)
  File "C:\Python\Python35\lib\site-packages\selenium\webdriver\support\select.py", line 212, in _setSelected
    option.click()
  File "C:\Python\Python35\lib\site-packages\selenium\webdriver\remote\webelement.py", line 77, in click
    self._execute(Command.CLICK_ELEMENT)
  File "C:\Python\Python35\lib\site-packages\selenium\webdriver\remote\webelement.py", line 494, in _execute
    return self._parent.execute(command, params)
  File "C:\Python\Python35\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 236, in execute
    self.error_handler.check_response(response)
  File "C:\Python\Python35\lib\site-packages\selenium\webdriver\remote\errorhandler.py", line 192, in check_response
    raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.ElementNotVisibleException: Message: {"errorMessage":"Element is not currently visible and may not be manipulated","request":{"headers":{"Accept":"application/json","Accept-Encoding":"identity","Connection":"close","Content-Length":"81","Content-Type":"application/json;charset=UTF-8","Host":"127.0.0.1:17758","User-Agent":"Python-urllib/3.5"},"httpVersion":"1.1","method":"POST","post":"{\"id\": \":wdc:1479563250968\", \"sessionId\": \"b2aa4180-ae5e-11e6-b8b3-e1a4ad040bb7\"}","url":"/click","urlParsed":{"anchor":"","query":"","file":"click","directory":"/","path":"/click","relative":"/click","port":"","host":"","password":"","user":"","userInfo":"","authority":"","protocol":"","source":"/click","queryKey":{},"chunks":["click"]},"urlOriginal":"/session/b2aa4180-ae5e-11e6-b8b3-e1a4ad040bb7/element/:wdc:1479563250968/click"}}
Screenshot: available via screen

修改：

当前代码：

    from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
from selenium.common.exceptions import TimeoutException
from selenium.common.exceptions import ElementNotVisibleException
import traceback
from selenium.webdriver.support.select import Select

driver1 = webdriver.PhantomJS(r'C:\Users\dodob\Desktop\Apps Workspace\phantomjs-2.1.1-windows\bin\phantomjs.exe')

def set_currency(label):
    is_change_currency_displayed = driver1.find_element_by_id("currencyList").is_displayed()
    if not is_change_currency_displayed:
        print("dropdown is not displayed.")
        one = WebDriverWait(driver1, 10).until(EC.element_to_be_clickable((By.CLASS_NAME, "selected-currency")))
        one.click()
    select_element = WebDriverWait(driver1, 10).until(EC.visibility_of_element_located((By.ID, "currencyList")))
    select = Select(select_element)
    select.select_by_visible_text(label)


def get_all_currencies():
    one = WebDriverWait(driver1, 10).until(EC.visibility_of_element_located((By.CLASS_NAME, "selected-currency")))
    one.click()
    el = WebDriverWait(driver1, 10).until(EC.visibility_of_element_located((By.ID, "currencyList")))
    currency2 = []
    options = el.find_elements_by_tag_name('option')
    for option in options:
        currency2.append(option.text)
    return currency2


def main(url):
    print(url)
    driver1.get(url)
    to_return_string = ''
    list_of_currencies = get_all_currencies()
    print(list_of_currencies)
    for currency in list_of_currencies:
        try:
            set_currency(currency)
            current_price = WebDriverWait(driver1, 10).until(
                EC.visibility_of_element_located((By.CSS_SELECTOR, ".current-price")))
            to_return_string += ("In " + currency + " : " + current_price.text + ' \n')
            print("In", currency, ":", current_price.text)
        except TimeoutException:
            print(traceback.print_exc())
            print("In", currency, ":", "Timed out waiting for page to load")
            to_return_string += ("In " + currency + " : " + " Timed out waiting for page to load" + ' \n')
        except ElementNotVisibleException:
            print(traceback.print_exc())
    return to_return_string


main('http://www.asos.com/it/asos/asos-jeans-skinny-alla-caviglia-kaki/prd/6759361')

当前输出：

C:\Python\Python35\python.exe C:/Users/dodob/PycharmProjects/AsosPriceCheckerWindows/currency.py
http://www.asos.com/it/asos/asos-jeans-skinny-alla-caviglia-kaki/prd/6759361
['£ GBP', '$ USD', 'C$ CAD', 'kr SEK', 'kr NOK', 'kr DKK', '₣ CHF', ' € EUR', '$ AUD', '¥ RMB', '$ HKD', '$ NZD', '$ SGD', 'NT$ TWD', 'руб.  RUB']
In £ GBP : € 33,99
In $ USD : € 33,99
None
Traceback (most recent call last):
In C$ CAD : Timed out waiting for page to load
  File "C:/Users/dodob/PycharmProjects/AsosPriceCheckerWindows/currency.py", line 43, in main
    set_currency(currency)
  File "C:/Users/dodob/PycharmProjects/AsosPriceCheckerWindows/currency.py", line 19, in set_currency
    select_element = WebDriverWait(driver1, 10).until(EC.visibility_of_element_located((By.ID, "currencyList")))
  File "C:\Python\Python35\lib\site-packages\selenium\webdriver\support\wait.py", line 80, in until
    raise TimeoutException(message, screen, stacktrace)
selenium.common.exceptions.TimeoutException: Message: 

dropdown is not displayed.
In kr SEK : € 33,99
In kr NOK : € 33,99
None
Traceback (most recent call last):
  File "C:/Users/dodob/PycharmProjects/AsosPriceCheckerWindows/currency.py", line 43, in main
    set_currency(currency)
  File "C:/Users/dodob/PycharmProjects/AsosPriceCheckerWindows/currency.py", line 21, in set_currency
    select.select_by_visible_text(label)
  File "C:\Python\Python35\lib\site-packages\selenium\webdriver\support\select.py", line 120, in select_by_visible_text
    self._setSelected(opt)
  File "C:\Python\Python35\lib\site-packages\selenium\webdriver\support\select.py", line 212, in _setSelected
    option.click()
  File "C:\Python\Python35\lib\site-packages\selenium\webdriver\remote\webelement.py", line 77, in click
    self._execute(Command.CLICK_ELEMENT)
  File "C:\Python\Python35\lib\site-packages\selenium\webdriver\remote\webelement.py", line 494, in _execute
    return self._parent.execute(command, params)
  File "C:\Python\Python35\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 236, in execute
    self.error_handler.check_response(response)
  File "C:\Python\Python35\lib\site-packages\selenium\webdriver\remote\errorhandler.py", line 192, in check_response
    raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.ElementNotVisibleException: Message: {"errorMessage":"Element is not currently visible and may not be manipulated","request":{"headers":{"Accept":"application/json","Accept-Encoding":"identity","Connection":"close","Content-Length":"81","Content-Type":"application/json;charset=UTF-8","Host":"127.0.0.1:60873","User-Agent":"Python-urllib/3.5"},"httpVersion":"1.1","method":"POST","post":"{\"id\": \":wdc:1479841552848\", \"sessionId\": \"aae52750-b0e6-11e6-a0c1-5193111f996c\"}","url":"/click","urlParsed":{"anchor":"","query":"","file":"click","directory":"/","path":"/click","relative":"/click","port":"","host":"","password":"","user":"","userInfo":"","authority":"","protocol":"","source":"/click","queryKey":{},"chunks":["click"]},"urlOriginal":"/session/aae52750-b0e6-11e6-a0c1-5193111f996c/element/:wdc:1479841552848/click"}}
Screenshot: available via screen

dropdown is not displayed.
In ₣ CHF : € 33,99
In  € EUR : € 33,99
Traceback (most recent call last):
None
  File "C:/Users/dodob/PycharmProjects/AsosPriceCheckerWindows/currency.py", line 43, in main
    set_currency(currency)
  File "C:/Users/dodob/PycharmProjects/AsosPriceCheckerWindows/currency.py", line 21, in set_currency
    select.select_by_visible_text(label)
  File "C:\Python\Python35\lib\site-packages\selenium\webdriver\support\select.py", line 120, in select_by_visible_text
    self._setSelected(opt)
  File "C:\Python\Python35\lib\site-packages\selenium\webdriver\support\select.py", line 212, in _setSelected
    option.click()
  File "C:\Python\Python35\lib\site-packages\selenium\webdriver\remote\webelement.py", line 77, in click
    self._execute(Command.CLICK_ELEMENT)
  File "C:\Python\Python35\lib\site-packages\selenium\webdriver\remote\webelement.py", line 494, in _execute
    return self._parent.execute(command, params)
  File "C:\Python\Python35\lib\site-packages\selenium\webdriver\remote\webdriver.py", line 236, in execute
    self.error_handler.check_response(response)
  File "C:\Python\Python35\lib\site-packages\selenium\webdriver\remote\errorhandler.py", line 192, in check_response
    raise exception_class(message, screen, stacktrace)
selenium.common.exceptions.ElementNotVisibleException: Message: {"errorMessage":"Element is not currently visible and may not be manipulated","request":{"headers":{"Accept":"application/json","Accept-Encoding":"identity","Connection":"close","Content-Length":"81","Content-Type":"application/json;charset=UTF-8","Host":"127.0.0.1:60873","User-Agent":"Python-urllib/3.5"},"httpVersion":"1.1","method":"POST","post":"{\"id\": \":wdc:1479841552851\", \"sessionId\": \"aae52750-b0e6-11e6-a0c1-5193111f996c\"}","url":"/click","urlParsed":{"anchor":"","query":"","file":"click","directory":"/","path":"/click","relative":"/click","port":"","host":"","password":"","user":"","userInfo":"","authority":"","protocol":"","source":"/click","queryKey":{},"chunks":["click"]},"urlOriginal":"/session/aae52750-b0e6-11e6-a0c1-5193111f996c/element/:wdc:1479841552851/click"}}
Screenshot: available via screen

dropdown is not displayed.
In ¥ RMB : € 33,99
In $ HKD : € 33,99
None
In $ NZD : Timed out waiting for page to load
Traceback (most recent call last):
  File "C:/Users/dodob/PycharmProjects/AsosPriceCheckerWindows/currency.py", line 43, in main
    set_currency(currency)
  File "C:/Users/dodob/PycharmProjects/AsosPriceCheckerWindows/currency.py", line 19, in set_currency
    select_element = WebDriverWait(driver1, 10).until(EC.visibility_of_element_located((By.ID, "currencyList")))
  File "C:\Python\Python35\lib\site-packages\selenium\webdriver\support\wait.py", line 80, in until
    raise TimeoutException(message, screen, stacktrace)
selenium.common.exceptions.TimeoutException: Message: 

dropdown is not displayed.
In $ SGD : € 33,99
In NT$ TWD : € 33,99
None
Traceback (most recent call last):
In руб.  RUB : Timed out waiting for page to load
  File "C:/Users/dodob/PycharmProjects/AsosPriceCheckerWindows/currency.py", line 43, in main
    set_currency(currency)
  File "C:/Users/dodob/PycharmProjects/AsosPriceCheckerWindows/currency.py", line 19, in set_currency
    select_element = WebDriverWait(driver1, 10).until(EC.visibility_of_element_located((By.ID, "currencyList")))
  File "C:\Python\Python35\lib\site-packages\selenium\webdriver\support\wait.py", line 80, in until
    raise TimeoutException(message, screen, stacktrace)
selenium.common.exceptions.TimeoutException: Message: 


Process finished with exit code 0

Answer 1

<强>问题：

代码似乎没问题。但是调用的顺序是造成问题的原因。

在main方法中调用以下行时：

list_of_currencies = get_all_currencies()

您点击以下get_all_currencies（）方法行中的selected-currency：

one.click() // opens the "Change-Currency" dropdown menu as shown in below image

并且该方法没有采取进一步行动。

然后我们在set_currency(currency)中调用for loop of main method。

再次在set_currency(currency)方法中点击selected-currency，这实际上是关闭了Change-Currency的已打开下拉列表，这会导致元素不可见异常。

<强>解决方案：

因此，在调用Change-Currency方法之前，请更改流程以确保打开set_by_visible_text下拉列表。

使用Change-Currency方法检查isDisplayed下拉列表是否已打开。

以下是代码:(在开头添加了2个新行）

def set_currency(label):
    isChangeCurrencyDisplayed  = driver.find_element_by_id("currencyList").is_displayed()
    if not isChangeCurrencyDisplayed:
        print "dropdown is not displayed."
        one = WebDriverWait(driver, 10).until(EC.element_to_be_clickable((By.CLASS_NAME, "selected-currency")))
        one.click()
    select_element = WebDriverWait(driver, 10).until(EC.visibility_of_element_located((By.ID, "currencyList")))
    select = Select(select_element)
    select.select_by_visible_text(text) # here text is "$ USD"

Answer 2

您可以等待想要的选择元素（货币元素）出现：

int n = 6396339, counter = 0;

    while (n > 0)
    {
        if ((n % 10) % 3 == 0) {
            counter++;
        }
        n /= 10;
    }
    cout << counter << endl;

或者，您可以点击下拉列表，等待select_visible_element = WebDriverWait(driver1, 10).until(EC.visibility_of_element_located((By.XPATH, "//a[contains(text(),'%s')]" %text)))和select_visible_element而不是选择。

select_by_visible_text python selenium ElementNotVisibleException

2 个答案: