Selenium TypeError：__ init __（）需要2个位置参数，但是给出了3个

Question

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
driver = webdriver.Firefox()
driver.get("http://somelink.com/")


WebDriverWait(driver, 10).until(expected_conditions.invisibility_of_element_located(By.XPATH, "//input[@id='message']"))
# Gives me an error:
TypeError: __init__() takes 2 positional arguments but 3 were given

...

# Simply:
expected_conditions.invisibility_of_element_located(By.XPATH, "//input[@id='message']"))
# Gives me the same error.
TypeError: __init__() takes 2 positional arguments but 3 were given

无论我使用By.XPATH，By.ID还是其他任何内容，错误都会重演。

另外，find_element工作正常：

el = driver.find_element(By.XPATH, "//input[@id='message']")
print(el) # returns:
[<selenium.webdriver.firefox.webelement.FirefoxWebElement (session="03cfc338-f668-4fcd-b312-8e4a1cfd9f24", element="c7f76445-08b3-4a4c-9d04-90263a1ef80e")>]

建议表示赞赏。

修改

评论中建议的By.XPATH, "//input[@id='message']"周围的额外括号（）解决了问题。

Answer 1

更改此

WebDriverWait(driver, 10).until(expected_conditions.invisibility_of_element_locate‌​d((By.XPATH, "//input[@id='message']")))

我添加了额外的（），希望这应该有效。