如何点击按钮可以用flash闪现出python中的字符串或其他数据
<body>
<form method = "post" action = "http://127.0.0.1:8000/login">
<table>
<tr>
<td>Username</td>
<td><input type = 'username' name = 'username'></td>
</tr>
<tr>
<td>Password</td>
<td><input type = 'password' name = 'password'></td>
</tr>
<tr>
<td><input type = "submit" value = "Submit"></td>
</tr>
</table>
</form>
{% if error %}
<p><strong>Error</strong>: {{ error }}</p>
{% endif %}
</body>
<body>
{% with messages = get_flashed_messages() %}
{% if messages %}
{% for message in messages %}
<p>{{ message }}</p>
{% endfor %}
{% endif %}
{% endwith %}
<h3>Welcome!</h3>
<a href = "{{ url_for('login') }}">login</a>
</body>
from flask import Flask,render_template,request,flash,redirect,url_for
app = Flask(__name__,template_folder='./')
app.secret_key = 'random string'
@app.route('/')
def index():
return render_template('index.html')
@app.route('/login', methods = ['GET', 'POST'])
def login():
error = None
if request.method == 'POST':
if request.form['username'] != 'admin' or request.form['password'] != 'admin':
error = 'Invalid username or password. Please try again!'
else:
flash('You were successfully logged in')
return redirect(url_for('index'))
return render_template('login.html', error = error)
if __name__ == '__main__':
app.run(host='127.0.0.1',port=8000)
前两个网页，通过点击index.html中的按钮提交上传，闪现出来的会出现在login.html