Top-level domain
Lesson 5 of 8 in Coddy's Email validator using Python course.
john@gmail.com
The bold part is the top-level domain name.
Top-level domains are the highest level of the domain name system for the Internet and is placed after the domain name in an email address.
Common top-level domains are:
- com
- net
- org
Challenge
EasyAdd to validate support for top-level domain name validation.
In out validator we will support easier terms, check that the top-level domain name is one of these:
- com
- net
- org
- tech
Any other name should return False!
Try it yourself
PERMITS_RECIEPENT = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789._'
PERMITS_DOMAIN = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-'
def validate(email):
if not email.count('@') == 1:
return False
recipient_name = email.split('@')[0]
if len(recipient_name) > 24 or len(recipient_name) < 3:
return False
for c in recipient_name:
if c not in PERMITS_RECIEPENT:
return False
if '.' == recipient_name[0] or '.' == recipient_name[-1] or '_' == recipient_name[0] or '_' == recipient_name[-1]:
return False
domain_name = email.split('@')[1].split('.')[0]
if len(domain_name) > 12 or len(domain_name) < 3:
return False
for c in domain_name:
if c not in PERMITS_DOMAIN:
return False
return True
