python email regex

# Python program to validate an Email 
# for regular expressions 
import re 
regex = '^[a-z0-9]+[\._]?[a-z0-9]+[@]\w+[.]\w{2,3}$'

def check(email):    
    if(re.search(regex,email)):  
        print("Valid Email")            
    else:  
        print("Invalid Email")  
      
if __name__ == '__main__' :  
    email = "[email protected]"
    check(email) 

const emailRegx=/^(([^<>()[\]\\.,;:\s@"]+(\.[^<>()[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;

# Python program to validate an Email 
  
# import re module 
  
# re module provides support 
# for regular expressions 
import re 
  
# Make a regular expression 
# for validating an Email 
regex = '^\w+([\.-]?\w+)*@\w+([\.-]?\w+)*(\.\w{2,3})+$'
      
# Define a function for 
# for validating an Email 
def check(email):  
  
    # pass the regualar expression 
    # and the string in search() method 
    if(re.search(regex,email)):  
        print("Valid Email")  
          
    else:  
        print("Invalid Email")  
      

[\w._%+-]+@[\w.-]+\.[a-zA-Z]{2,3}

r"(^[a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+\.[a-zA-Z0-9-.]+$)"

(?:[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*|"(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21\x23-\x5b\x5d-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])*")@(?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?|\[(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[a-z0-9-]*[a-z0-9]:(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21-\x5a\x53-\x7f]|\\[\x01-\x09\x0b\x0c\x0e-\x7f])+)\])