python - 具有预期条件的 Selenium : 'str' object is not callable

Question

我得到了

Traceback (most recent call last):
  File "/Users/xyz/Documents/Projects/apartmentsearch/stanga.py", line 46, in <module>
    wait.until(EC.visibility_of_element_located(By.CLASS_NAME('sk-fading-circle spinner-container-3')))
TypeError: 'str' object is not callable

运行这段代码时

from bs4 import BeautifulSoup
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

PHANTOMJS_PATH = './pjs/bin/phantomjs'

browser = webdriver.PhantomJS(PHANTOMJS_PATH)
browser.get('REDACTED')

wait = WebDriverWait(browser, 10)
wait.until(EC.visibility_of_element_located(By.CLASS_NAME('sk-fading-circle spinner-container-3')))
wait.until(EC.invisibility_of_element_located(By.CLASS_NAME('sk-fading-circle spinner-container-3')))

soup = BeautifulSoup(browser.page_source, "html.parser")

print(soup.prettify())

运行 python 2.7。已编辑的网站 URL 但它可以正常工作，我无需等待即可加载页面。

在线代码片段似乎表明像这样的代码应该是可运行的。我错过了什么？我会使用断点来解决问题，但 PyCharm 出于某种原因并没有在我的断点处停止，这也是我想弄清楚的...

Answer 1

您指定的定位器有误。它需要是 (By, selector_string)

的元组(或数组)

wait = WebDriverWait(browser, 10)
wait.until(EC.visibility_of_element_located((By.CLASS_NAME, 'sk-fading-circle 
spinner-container-3')))
wait.until(EC.invisibility_of_element_located((By.CLASS_NAME, 'sk-fading-circle 
spinner-container-3')))

而且您似乎正尝试为 CLASS_NAME 使用多个类。我认为那行不通。你应该试试 (By.CSS_SELECTOR, '.sk-fading-circle.spinner-container-3') 而不是