我正在使用一个名为callow的蛮力脚本，我试图在一个免费的沙箱上测试它(因为我正在学习道德黑客)，当我运行该脚本时，我会得到以下错误：

Traceback (most recent call last):
  File "C:\Users\Joe\callow\callow.py", line 163, in <module>
    wizard()
  File "C:\Users\Joe\callow\callow.py", line 93, in wizard
    brutes(username, username_selector, password_selector, submit_selector, pass_list, website)
  File "C:\Users\Joe\callow\callow.py", line 119, in brutes
    Sel_user = browser.find_element_by_css_selector(username_selector) # Finds Selector
AttributeError: 'WebDriver' object has no attribute 'find_element_by_css_selector'

下面是我的代码的一部分，错误似乎是从这里产生的。

try:
        Sel_user = browser.find.element_by_css_selector(username_selector) # Finds Selector
    except selenium.common.exceptions.NoSuchElementException:
        print((color.RED + '\n[!]'+ color.CWHITE + ' Username feild selector is invalid.'))
        sys.stdout.flush()
        exit()
        Sel_pas = browser.find_element_by_css_selector(password_selector) # Finds Selector
    except selenium.common.exceptions.NoSuchElementException:
        print((color.RED + '\n[!]'+ color.CWHITE + ' Password feild selector is invalid.'))
        sys.stdout.flush()
        exit()