selenium获取元素后用click()点击没有作用，用键盘输入enter（Keys.ENTER）就可以成功

#coding = utf-8
from selenium import webdriver
from selenium.webdriver.common.keys import Keys


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

driver.find_element_by_xpath("//*[@id='gxszButton']/a[1]").send_keys(Keys.ENTER)    #键盘输入enter

# driver.find_element_by_xpath("//*[@id='gxszButton']/a[1]").click()   #用click()点__击