Python 获取%不支持的操作数类型时出错：'；元组'；和'；str'；

我有定位器

class MainPageLocatars(object):
  # Login function locators
  LOGFILELOCATOR     = (By.XPATH, '//a[contains(@href, "%s")]/./../../td[7]')

我调用此定位器的方式如下：

from locators import *

def autoload(self, subFolder, fileName, logFile):
        # change made below
        beforeDate = self.find_element(MainPageLocatars.LOGFILELOCATOR % logFile).text

这是正确的方法吗

这就是我得到的错误：

   beforeDate = self.driver.find_element_by_xpath((AutoLoaderLocatars.LOGFILELOCATOR) % logFile).text
TypeError: unsupported operand type(s) for %: 'tuple' and 'str'

---

MainPageLocatars.LOGFILELOCATOR

是一个元组：实际上它包含两个元素。元组上没有定义

%

运算符

您应该解耦合并处理结果：

def autoload(self, subFolder, fileName, logFile):
    #first obtain the two elements in the tuple
    (a,b) = MainPageLocatars.LOGFILELOCATOR
    #next find the element and use the % operator in the string
    beforeDate = self.find_element((a,b%logFile)).text