我如何使用Selenium的等待？

期望条件期望传递元组,其中第一项是定位器的类型(By常量),第二项是定位器的值:

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

wait = WebDriverWait(browser, 10)
wait.until(EC.presence_of_element_located((By.XPATH, '//*[@id="hplogo"]')))

请注意,在您的情况下By.ID会更简单:

wait.until(EC.presence_of_element_located((By.ID, 'hplogo')))