AJAX - wtform-flask

from wtforms import Form,StringField,validators

from flask import Flask,render_template,request

app=Flask(__name__)

#validacion globa formsl!

def validacion_G(form,field):

	if len(field.data)==1:

		return validators.ValidationError('no es un Numero')

class FormUser(Form):

	description  = StringField('Description',[validacion_G])

	def validate_description(self,form,field):

		if len(field.data) > 2:

			raise validators.ValidationError('Name must be less than 50 characters')

@app.route('/',methods=['POST','GET'])

def main():

	frm=FormUser()

	if request.method=='POST'and frm.validate():

		print("pase")

	else:

		print("no pase")

	return render_template("index.html",frm=frm)

if "__main__"==__name__:

	app.run(debug=True)