问如何在单击Selenium元素后用xsel提取剪贴板内容

EN

import unittest
from selenium import webdriver
from selenium.webdriver.support.wait import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
from selenium.webdriver.common.by import By
import subprocess


class Test(unittest.TestCase):
    def run(self):
        self.driver = webdriver.Firefox()
        self.driver.get('some_uri')
        self.wait = WebDriverWait(self.driver, 20)
        link_elem = self.wait.until(EC.visibility_of_element_located((By.CSS_SELECTOR, "i[data-original-title='Copy to clipboard']")))
        link_elem.click()
        self.wait.until(EC.visibility_of_element_located((By.CSS_SELECTOR, "i[data-original-title='Copied']")))        
        link = subprocess.check_output(["xsel"])
        print(link)