Verbose in Python Regex

# Without Using VERBOSE
regex_email = re.compile(r'^([a-z0-9_\.-]+)@([0-9a-z\.-]+)\.([a-z\.]{2, 6})$',
              re.IGNORECASE)
 
# Using VERBOSE
regex_email = re.compile(r"""
            ^([a-z0-9_\.-]+)              # local Part
            @                             # single @ sign
            ([0-9a-z\.-]+)                # Domain name
            \.                            # single Dot .
            ([a-z]{2,6})$                 # Top level Domain  
             """,re.VERBOSE | re.IGNORECASE)   

# Python3 program to show the Implementation of VERBOSE in RegEX
import re

def validate_email(email):

    # RegexObject = re.compile( Regular expression, flag )
    # Compiles a regular expression pattern into 
    # a regular expression object
    regex_email=re.compile(r"""
                           ^([a-z0-9_\.-]+)                 # local Part
                           @                             # single @ sign
                            ([0-9a-z\.-]+)                 # Domain name
                           \.                             # single Dot .
                            ([a-z]{2,6})$                 # Top level Domain     
                           """,re.VERBOSE | re.IGNORECASE)

    # RegexObject is matched with the desired
    # string using fullmatch function
    # In case a match is found, search()
    # returns a MatchObject Instance
    res=regex_email.fullmatch(email)

    #If match is found, the string is valid
    if res:
        print("{} is Valid. Details are as follow:".format(email))
        
        #prints first part/personal detail of Email Id
        print("Local:{}".format(res.group(1)))
        
        #prints Domain Name of Email Id
        print("Domain:{}".format(res.group(2)))
        
        #prints Top Level Domain Name of Email Id
        print("Top Level domain:{}".format(res.group(3)))
        print()
        
    else:
        #If match is not found,string is invalid
        print("{} is Invalid".format(email))

# Driver Code
validate_email("[email protected]")
validate_email("[email protected]@")
validate_email("[email protected]")