selenium变速移动验证码滑块

'''先加速后减速'''
from selenium.webdriver import ActionChains
from selenium import webdriver
import time

driver=webdriver.Chrome()
driver.get("https://www.qichacha.com/user_login")
time.sleep(1)
driver.find_element_by_xpath('//*[@id="normalLogin"]').click()
time.sleep(1)
huakuai=driver.find_element_by_xpath('//*[@id="nc_1_n1z"]')

def get_track(distance):      # distance为传入的总距离
    # 移动轨迹
    track=[]
    # 当前位移
    current=0
    # 减速阈值
    mid=distance*4/5
    # 计算间隔
    t=0.2
    # 初速度
    v=0

    while current<distance:
        if current<mid:
            # 加速度为2
            a=2
        else:
            # 加速度为-2
            a=-3
        v0=v
        # 当前速度
        v=v0+a*t
        # 移动距离
        move=v0*t+1/2*a*t*t
        # 当前位移
        current+=move
        # 加入轨迹
        track.append(round(move))
    return track
def move_to_gap(slider,tracks):     # slider是要移动的滑块,tracks是要传入的移动轨迹
    ActionChains(driver).click_and_hold(slider).perform()
    for x in tracks:
        ActionChains(driver).move_by_offset(xoffset=x,yoffset=0).perform()
    time.sleep(0.5)
    ActionChains(driver).release().perform()

if __name__ == '__main__':
    move_to_gap(huakuai,get_track(340))