3.猜拳游戏：石头、剪刀、布的游戏

##不用render_template函数，把html代码放在py文件里，不用单独写html文件
from flask import Flask, request
import randomapp = Flask(__name__)@app.route('/')
def index():#下面form标签虽然放在注释里，但是是可以读取的html内容return '''<form method="POST" action="/play"><label>出拳输入：1石头，2剪刀，3布：</label><input type="text" name="user_input"><input type="submit" value="提交"></form>'''@app.route('/play', methods=['POST'])
def play():computer = random.randint(1, 3)user_input = request.form['user_input']#直接从form标签下 input里拿值try:n = int(user_input)if n == computer:return f'平局,对方{computer}'elif (n == 1 and computer == 2) or (n == 2 and computer == 3) or (n == 3 and computer == 1):return f'你赢了！！,对方{computer}'elif n >= 4:return f'请出123石头剪刀布！！,对方{computer}'elif user_input == '':return '请出拳！'elif n == 0:return '游戏结束！！'else:return f'你输了！！,对方{computer}'except ValueError:return '请重新输入123或输入0退出：'if __name__ == '__main__':app.run()