def email_list(domains): emails = [] for domain, users in domains.items(): for user in users: emails.append(user + "@" + domain) # emails.append("{}@{}".format(user, domain)) return(emails)
Which way is better in this case and why?
- emails.append(user + “@” + domain)
- emails.append(“{}@{}”.format(user, domain))
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Answer
In my honest opinion, f-strings are the best. They are flexible and readable. Unlike other concats, you don’t have to make sure you insert all strings. Infact, you can do something like that:
number = 9 text = "hello" print(f"{text} {number}")
Also, it will automatically convert eventual quotes and special characters!
Globally, there isn’t a solution better than another. It’s all depending on the use case. But generally, fstrings are better.