Selenium's pull-down + headless browser

The drop-down ？？？

Drop down refers to the drop-down options shown in the figure below , When we want to switch , You need to click the drop-down box first , Choose again

With Art, For example ：

1. Navigate to the drop-down list
   sel_el = web.find_element_by_xpath(‘//*[@id=“OptionDate”]’)
   

2. Wrap the elements , Wrap into a drop-down menu
   sel = Select(sel_el)

3. Switch

1. Switch by index
   sel.select_by_index(i) # i Is the index value
2. By element value Switch
   sel.select_by_value(value)
3. according to text Switch
   sel.select_by_visible_text(text)

Be careful ：
Every time you switch, you will send a network request , Time to load

Headless browser

Headless browser ： It refers to the process of get In operation , The browser window will not pop up

How to get headless browser ？
With Chrome Browser as an example ： Yes Chrome Make a configuration

1. Import package

from selenium.webdriver.chrome.options import Options

2. Prepare parameter configuration

opt = Options()
opt.add_argument(‘–headless’)
opt.add_argument(‘–disbale-gpu’)

3. Set parameters in the browser

web = Chrome(options=opt)

example

import time

from selenium.webdriver import Chrome
from selenium.webdriver.support.select import Select

# Headless browser ： The browser window will not pop up when running 
# How to set up headless browser ？
# Yes Chrome Make a configuration 

# 1. Import package 
from selenium.webdriver.chrome.options import Options
# 2.  Prepare parameter configuration 
opt = Options()
opt.add_argument('--headless')
opt.add_argument('--disbale-gpu')
# 3.  Set parameters in the browser 
web = Chrome(options=opt)

# web = Chrome()

web.get('https://www.endata.com.cn/BoxOffice/BO/Year/index.html')

#  Navigate to the drop-down list 
sel_el = web.find_element_by_xpath('//*[@id="OptionDate"]')

# Wrap the elements , Wrap into a drop-down menu 
sel = Select(sel_el)

#  Let the browser adjust the options 
for i in range(len(sel.options)):   # there i Is the index position of each drop-down box option 
    sel.select_by_index(i)  #  Switch by index 
    # Be careful ： Every time you switch, you will send a network request , Time to load 
    time.sleep(2)
    table = web.find_element_by_xpath('//*[@id="TableList"]/table')
    print(table.text)
    print('================')

print(' The program is finished ')
web.close()