与关联来自重定向的多个值有关的语法问题

from flask import Flask, redirect, url_for

app = Flask(__name__)

@app.route('/redirect_with_params')
def redirect_with_params():
    param1 = 'value1'
    param2 = 'value2'
    return redirect(url_for('target_route', param1=param1, param2=param2))

@app.route('/target_route')
def target_route():
    param1 = request.args.get('param1')
    param2 = request.args.get('param2')
    return f'Param1: {param1}, Param2: {param2}'

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

from flask import Flask, redirect, url_for, session

app = Flask(__name__)
app.secret_key = 'your_secret_key'

@app.route('/redirect_with_session')
def redirect_with_session():
    session['param1'] = 'value1'
    session['param2'] = 'value2'
    return redirect(url_for('target_route'))

@app.route('/target_route')
def target_route():
    param1 = session.get('param1')
    param2 = session.get('param2')
    return f'Param1: {param1}, Param2: {param2}'

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

from flask import Flask, redirect, url_for, flash, request

app = Flask(__name__)
app.secret_key = 'your_secret_key'

@app.route('/redirect_with_flash')
def redirect_with_flash():
    flash('value1', 'param1')
    flash('value2', 'param2')
    return redirect(url_for('target_route'))

@app.route('/target_route')
def target_route():
    param1 = request.args.get('param1')
    param2 = request.args.get('param2')
    return f'Param1: {param1}, Param2: {param2}'

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