有没有办法使用切片和索引来检索特定的字符串值？

Question

I am trying to retrieve the username and domain from a user email address.

For example: john.smith@apple.com

username = john.smith    
domain = apple

I am trying to remove the ".com" from being printed to the console. Note, other email addresses could account for different endings such as ".ca", ".org", etc.

I also know I can use the.partition() method, however, I am trying to accomplish this with slicing and indexing.

Here is some code I have written so far:

mail = input("Enter email address: ")

username = email.find("@")
domain = email.find("@")

print("Username: " + email[:username])

print("Domain: " + email[domain+1:])

Output:

Enter email address: john.smith@apple.com
Username: john.smith
Domain: apple.com

Goal:

Enter email address: john.smith@apple.com
Username: john.smith
Domain: apple

Is there a way (only through indexing and slicing) that I can account for any amount of chars a user inputs to console, and remove the ".com" or ".ca", thus, only displaying the main name in the domain? Am I on the right track with finding the "@" and then slicing it from there?

Answer 1

You already demonstrated every technique you should use to solve this. You already divided the full string at the addend; now do the same for the dot in the address:

domain = email[domain+1:]     # "apple.com"
dot = domain.find(`.`)        # Get position of the dot ...
company = domain[:dot]        #   and take everything up to that position.
print(company)

Answer 2

Something as simple as this should do the trick.

email = "john.smith@apple.com".split('@')
username,domain= email[0],email[1].split('.')[0]
print(f'username: {username}\ndomain:{domain}')

broken down

simple break it down to ["john.smith","apple.com"]

username is first element in list

domain will take the second element in the list

split that element and take "apple" (first index)

 email = "john.smith@apple.com".split('@') username = email[0] domain = email[1].split('.')[0] print(f'username: {username}\ndomain:{domain}')

output

 username: john.smith domain:apple