硒webdriverwait：__init __（）究竟需要两个参数（3给出）

Question

给出了错误的

Traceback (most recent call last): 
    File "p3.py", line 21, in <module> 
    WebDriverWait(driver, timex).until(EC.presence_of_element_located(by, element)) 
TypeError: __init__() takes exactly 2 arguments (3 given) 

我没有用过__init__()这是为什么错误呢？

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

chrome_path=r"C:\Users\Bhanwar\Desktop\New folder (2)\chromedriver.exe" 
driver =webdriver.Chrome(chrome_path) 
driver.get("https://priceraja.com/mobile/pricelist/samsung-mobile-price-list-in-india") 
#driver.implicitly_wait(10) 
i=0 
timex = 5 
by = By.ID 
hook = "product-itmes-" # The id of one item, they seems to be this plus 
         # the number item that they are 
button = '.loadmore' 
while i<3: 
    element_number = 25*i 
    element=hook+str(element_number)# It looks like there are 25 items added each time, and starts at 25 
    WebDriverWait(driver, timex).until(EC.presence_of_element_located(by, element)) 
    driver.find_element_by_css_selector(button).click() 
    time.sleep(5) # Makes the page wait for the element to change 
    i+=1 

Answer 1

presence_of_element_located()只需要一个参数，一个定位器，它是一个元组。您忘记在呼叫中添加一个元组所需的(...)圆括号：

WebDriverWait(driver, timex).until(
    EC.presence_of_element_located((by, element))) 
#   these make this a tuple^and  ^