Wtforms commonly used validators

 fromWtformsImportForm,stringfield,integerfield fromWtformsImportvalidators fromWtforms.validatorsImportLength,equalto,email,inputrequired,numberrange, Regexp,url,uuidclassRegisterform (Form): Username= Stringfield (Validators=[length (max=10,min=3,message='Incorrect user name length')]) password= Stringfield (Validators=[length (max=10,min=3,message='password length is incorrect')]) password_repeat= Stringfield (Validators=[length (max=10,min=3,message='password length is incorrect'), Equalto ('Password')])classLoginForm (Form):#email = Stringfield (Validators=[email (message= ' mailbox format is incorrect ')])    #username = Stringfield (validators=[inputrequired (message= ' must fill in username ')]) #inputrequired必填字段    #Age = Integerfield (Validators=[numberrange (12,100))) #验证数字在某某区间之内    #phone = Stringfield (Validators=[regexp (R ' 1[85347]\d{9} ', message= ' phone number format incorrect ')])    #home_page = Stringfield (Validators=[url ())) #必须验证必须是一个跳转链接UUID = Stringfield (Validators=[uuid ()))#Verify that the UUID

 fromFlaskImportflask,request,render_template fromFormsImportRegisterform,loginformapp= Flask (__name__) @app. Route ('/')defHello_world ():return 'Hello world!'@app. Route ('/register/', methods=['Get','Post'])defRegister ():ifRequest.method = ='GET':        returnRender_template ('register.html')    Else:        #username = request.form.get (' username ')        #password = request.form.get (' password ')        #password_repeat = request.form.get (' password_repeat ')        #if 3 > Len (username) or len (username) >:        #return ' user name length is incorrect '        #if 3 > Len (password) or len (password) >:        #return ' password length is incorrect '        #if password! = password_repeat:        #return ' password input inconsistent 'form =registerform (Request.Form)ifform.validate ():return 'Success'        Else:            Print(form.errors)#{' username ': [' incorrect length of user name '],            #' password ': [' password length is incorrect '], ' password_repeat ': [' password length is incorrect ']}            #because it's a dictionary, I don't write it.            return 'fail'@app. Route ('/login/', methods=['Get','Post'])#If the methods does not have a post method, the status code 405 error is reported,#static file does not allow the Post method to be requesteddeflogin ():ifRequest.method = ="GET":        returnRender_template ('login.html')    Else: Login_form=loginform (Request.Form)iflogin_form.validate ():return 'Success'        Else:            return '{Errors}'. Format (Errors=login_form.errors.get ('Phone') [0])#Get specific error messagesif __name__=='__main__': App.run (Debug=true)

Wtforms commonly used validators