Selenium WebDriver- 使用显示等待，判断搜狗的输入框是否显示，按钮是否可点击，然后在输入光荣之路搜索词，然后在点击搜索。

#encoding=utf-8
from selenium import webdriver
import time
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC

def visibility(webelement):
    wait = WebDriverWait(driver, 10, 0.2)
    wait.until(EC.visibility_of(webelement))

def clickable(by,locator_path):
    wait = WebDriverWait(driver, 10, 0.2)
    element = wait.until(EC.element_to_be_clickable((By.ID,"stb")))
    return element

driver = webdriver.Ie(executable_path = "e:\\IEDriverServer")
driver.get("http://www.sogou.com")
input_box=driver.find_element_by_id("query")
visibility(input_box)
input_box.send_keys(u"光荣之路")
button = clickable(By.ID,"stb")
button.click()

time.sleep(3)

driver.close()