def signup():
if request.method == 'GET':
return render_template('signup.html')
username = request.form['username']
password = request.form['password']
if len(username)<4 or len(password)<6:
flash('Invalid format')
return render_template('signup.html')
try:
user = User.get(username, password)
except UserNotExist:
user = User.new(username, password)
resp = make_response(redirect(url_for('home')))
session['username'] = user.username
return resp
except:
flash('Username Exist.')
return render_template('signup.html')
