@cvp You are right . Function name can't be written casually.

I almost finished my code.
But still have a problem
When I tapped button0 TAP ,button0 does not disappear as sender.title = ‘ ‘, and the new button has displayed.
And how to use remove_subview(button0)?

import requests
import re
import json
import ui, appex
import webbrowser

headers={
	'User-Agent':'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36'
}
data = {
	'cate':'realtimehot'
}


def get_page(url):
	response = requests.get(url)
	html = response.text
	#print(html)
	return html


def parse_html(html):
	#top = re.findall(r'class="icon-top"></i></td>.*?<td class="td-02">.*?<a href="(.*?)" target="_blank">(.*?)</a>.*?</td>', html, re.S)
	data = re.findall(r'ranktop">(.*?)</td>.*?<a href="(.*?)" target="_blank">(.*?)</a>.*?<span>(.*?)</span>', html, re.S)
	#print(top)
	#print(data)
	return data


def write_data(data):
	with open(r'./wb.json', 'w', encoding='gbk') as f:
		for i in data:
			f.writelines(json.dumps(i) + '\n')
	print('done')
	

def get_json(items, host):
	for item in items:
		yield {
			'rank': item[0],
			'href': host + item[1],
			'title': item[2],
			'num': item[3],
		}

class control(ui.View):
	def __init__(self):
		self.frame=(0,0,400,600)
		appex.set_widget_view(self)
		
		
	def button_tapped1(self, sender):
		webbrowser.open(sender.href)

		
	def button_tapped(self, sender):
		sender.title = ''
		self.list()
	

	def layout(self):
		button0 = ui.Button(font=('<System>', 34), frame=(100,25,200,40), tint_color='red')
		button0.title = 'TAP'
		button0.action = self.button_tapped
		self.add_subview(button0)
		return button0
	

	def list(self):
		host = 'https://s.weibo.com'
		url = 'http://s.weibo.com/top/summary?'
		html = get_page(url)
		data = parse_html(html)
		wb = get_json(data, host)
		write_data(wb)
		with open('./wb.json', 'r') as f:
			wb = f.readlines()
		for i in range(0,23):
			wbi = wb[i]
			title = json.loads(wbi)['title']
			href = json.loads(wbi)['href']
			#title = json.loads(wbi)
			button = ui.Button(title=title, font=('<System>', 18))
			button.href = 'Alook://' + href
			button.action = self.button_tapped1
			button.frame = (0,i*25,400,20)
			self.add_subview(button)

	
def main():
	control()


if __name__ == '__main__':
	main()

I’ll try.
Thank you @ccc and thank @cvp .
Also thanks to Google Translate.😅

@ccc my button url is a variable.

def button_tapped(sender):
	self.webbrowser.open(href) #？？？
v=ui.View(frame=(0,0,300,400))
with open('./wb.json', 'r') as f:
	wb = f.readlines()
	for i in range(0,20):
		wbi = wb[i]
		title = json.loads(wbi)['title']
		href = json.loads(wbi)['href']  #href is the button url
		button = ui.Button(title=title)
		button.action = button_tapped 
		button.frame = (0,i*25,450,20)
		v.add_subview(button)

I think I need 20 button.tapped functions.

@ccc there’s many links in a file, Function cannot pass variables.

And another problem is Button.action
The function must take a single sender parameter.
I want different buttons to correspond to different links.

@mikael I plan to do less than 50 lines.
Each button is actually a hyperlink that allows browse the web in the widget.That's my idea.

@brumm I succeeded
I didn't set the position when I tried it, the second button blocked the first button.
Thank U.

@cvp Thank u.
Can you give me an example with the following code?
In a widget display both button1 and button2.

v = ui.View()
button1 = ui.Button(title='button1')
button2 = ui.Button(title='button2')
v.add_subview(button)
appex.set_widget_view(v)

It use in widget.
1.get date in a json file
2.get date from datetime
3.If the two dates are the same, read the json file，else update the json file and read it.
4.put the result in widget.

I am a newbie, please advise.

And I want to ask how to display multiple buttons in the widget and can turn pages？

# -*- coding: UTF-8 -*-

import requests
import re
import json
import datetime
import appex, ui

headers = {
'User-Agent': 'Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36',
'Accept-Language': 'zh-CN,zh;q=0.9'
}


def get_page(url):
    response = requests.get(url, headers=headers)
    data = json.loads(response.text)
    return data


def write_file(data):
    with open(r'./mryj.json', 'w+') as f:
        f.write(json.dumps(data))
        print('文件已更新')


def get_filedate():
    try:
        with open(r'./mryj.json', 'r') as f:
            d = json.loads(f.read())
            filedate = d['dateline']
            print('文件日期 ', filedate)
    except:
        with open(r'./mryj.json', 'w+') as f:
            d = f.write(json.dumps({'dateline':'None'}))
            filedate = 'None'
    return filedate


def get_datetime():
    timenow = datetime.datetime.now().strftime('%Y-%m-%d')
    print('实际日期 ', timenow)
    return timenow



def layout():
	with open(r'./mryj.json', 'r') as f:
		data = json.loads(f.read())
	v = ui.View()
	text = ui.TextView(font=('Didot', 15))
	text.text = '   ' + data['note'] + '\n' + '  ' + data['content']
	text.editable = False
	text.selectable = False
	v.add_subview(text)
	appex.set_widget_view(text)
	
url = 'http://open.iciba.com/dsapi/'

filedate = get_filedate()
timenow = get_datetime()
if filedate == timenow:
    print('时间相同,读取文件')
    layout()
else:
    print('时间不同，更新文件')
    data = get_page(url)
    write_file(data)
    layout()