如何通过Selenium从下拉列表中选择？

Question

I'm trying to select a value from a drop-down list that indicates the number of posts that are displayed from the website.

<form method="get" class="forumForm">
        <label for="dispItems">Show items:</label> 
        <select id="dispItems" class="dispItems">
            <option selected="selected">15</option>
            <option>30</option>
            <option>60</option>
            <option>90</option>
            <option>120</option>
            <option>150</option>
        </select>
</form>

I want to change this so that the last option is selected. Through other answers I've tried to the following solution:

from selenium.webdriver.support.ui import Select

select = Select(driver.find_element_by_id("dispItems"))

# None of these two options work.
select.select_by_index(4)            # Option 1.
select.select_by_visible_text("150") # Option 2.

Both option 1 and option 2 return the following error message:

WebDriverException: Message: 

If I try:

select.select_by_visible_text("random")

I get the following error message:

NoSuchElementException: Message: Could not locate element with visible text: random

Edit: The solution, as proposed by KunduK is

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

element=WebDriverWait(driver,20).until(EC.element_to_be_clickable((By.XPATH    ,'//select[@id="dispItems"][@class="dispItems"]')))
time.sleep(1)
select=Select(element)
time.sleep(1)
select.select_by_visible_text('150')

Answer 1

Try to use the explicit wait:

from selenium.webdriver.support.ui import Select
from selenium.webdriver.support import ui
from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.common.by import By


select = Select(ui.WebDriverWait(driver, 10).until(EC.element_to_be_clickable((By.ID, "dispItems"))))
select.select_by_index(4)

Hope it helps you!

Answer 2

尝试以下选择最后一项driver.find_element_by_xpath（“（// select ['dispItems'] / option）[last（）]”）。click（）

Answer 3

Try WebDriverWait this should work.

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

element=WebDriverWait(driver,20).until(EC.element_to_be_clickable((By.XPATH,'//select[@id="dispItems"][@class="dispItems"]')))
select=Select(element)
select.select_by_visible_text('150')

OR

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

element=WebDriverWait(driver,20).until(EC.element_to_be_clickable((By.XPATH,'//select[@id="dispItems"][@class="dispItems"]')))
element.click()
element.send_keys(Keys.END)
element.send_keys(Keys.ENTER)

EDITED:

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

element=WebDriverWait(driver,20).until(EC.element_to_be_clickable((By.XPATH,'//select[@id="dispItems"][@class="dispItems"]')))
element.click()
time.sleep(2)
element.send_keys(Keys.END)
time.sleep(2)
element.send_keys(Keys.ENTER)