form method='post'>
  input type="text" name="username" placeholder='Username'>
  input type="password" name="password" placeholder='password'>
  input type="submit">
/form>

from flask import Flask,render_template,request

@app.route('/login',methods=['GET','POST'])
def login():
  if request.method == 'POST':
    username = request.form['username']
    password = request.form['password']
    print username,password
  return render_template('login.html',method=request.method)123456789

app.config['SECRET_KEY'] = 'SECRET_KEY'1

form method="post">
 #設(shè)置csrf_token
 {{ form.csrf_token() }}
 {{ form.us.label }}
 p>{{ form.us }}/p>
 {{ form.ps.label }}
 p>{{ form.ps }}/p>
 {{ form.ps2.label }}
 p>{{ form.ps2 }}/p>
 p>{{ form.submit() }}/p>
 {% for x in get_flashed_messages() %}
   {{ x }}
 {% endfor %}
/form>1234567891011121314
視圖函數(shù)
#coding=utf-8
from flask import Flask,render_template,\

  redirect,url_for,session,request,flash

#導(dǎo)入wtf擴(kuò)展的表單類
from flask_wtf import FlaskForm
#導(dǎo)入自定義表單需要的字段
from wtforms import SubmitField,StringField,PasswordField
#導(dǎo)入wtf擴(kuò)展提供的表單驗(yàn)證器
from wtforms.validators import DataRequired,EqualTo
app = Flask(__name__)
app.config['SECRET_KEY']='1'

#自定義表單類，文本字段、密碼字段、提交按鈕
class Login(FlaskForm):
  us = StringField(label=u'用戶名',validators=[DataRequired()])
  ps = PasswordField(label=u'密碼',validators=[DataRequired(),EqualTo('ps2','err')])
  ps2 = PasswordField(label=u'確認(rèn)密碼',validators=[DataRequired()])
  submit = SubmitField(u'提交')

@app.route('/login')
def login():
  return render_template('login.html')

#定義根路由視圖函數(shù)，生成表單對(duì)象，獲取表單數(shù)據(jù)，進(jìn)行表單數(shù)據(jù)驗(yàn)證
@app.route('/',methods=['GET','POST'])
def index():
  form = Login()
  if form.validate_on_submit():
    name = form.us.data
    pswd = form.ps.data
    pswd2 = form.ps2.data
    print name,pswd,pswd2
    return redirect(url_for('login'))
  else:
    if request.method=='POST':
      flash(u'信息有誤，請(qǐng)重新輸入！')
    print form.validate_on_submit()

  return render_template('index.html',form=form)
if __name__ == '__main__':
  app.run(debug=True)