python---滚动条操作

"""

 1、让元素滚动到可见区域后，再操作。（大部分的网页自己会滚，直接找元素---下一页）
 
  drive.find_element("id","kw").send_keys("hhh",Keys.ENTER)
  loc =(By.XPATH,'//a[text()="下一页 >"]')
  WebDriverWait(drive,20).until(ec.visibility_of_element_located(loc))
  els = drive.find_element(*loc).click()
  
 2、元素本身：els.location_once_scrolled_into_view
 
   drive.find_element("id","kw").send_keys("hhh",Keys.ENTER)
   loc =(By.XPATH,'//a[text()="下一页 >"]')
   WebDriverWait(drive,20).until(ec.visibility_of_element_located(loc))
   els = drive.find_element(*loc)
   els.location_once_scrolled_into_view
   
 3、js代码滚动：element.scrollIntoView（）
 
   drive.find_element("id","kw").send_keys("hhh",Keys.ENTER)
   loc =(By.XPATH,'//a[text()="下一页 >"]')
   WebDriverWait(drive,20).until(ec.visibility_of_element_located(loc))
   els = drive.find_element(*loc)
   js = 'argument[0].scrollIntoView()'
   drive.execute_script(js,els)
 
 4、在f12种调试模式可以输入window.scrollIo(0,200)----根据大小滚动