Flask/Python -在函数之间传递变量

from flask import Flask

app = Flask(__name__)

@app.route('/user/<username>')
def show_user(username):
    return f"Hello, {username}!"

if __name__ == '__main__':
    app.run()

from flask import Flask, request

app = Flask(__name__)

@app.route('/search')
def search():
    keyword = request.args.get('keyword')
    return f"Search results for: {keyword}"

if __name__ == '__main__':
    app.run()

from flask import Flask, request, render_template

app = Flask(__name__)

@app.route('/login', methods=['GET', 'POST'])
def login():
    if request.method == 'POST':
        username = request.form['username']
        password = request.form['password']
        # 进行登录验证等操作
        return f"Welcome, {username}!"
    return render_template('login.html')

if __name__ == '__main__':
    app.run()