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python-3.xmethodsstring-formattingnameerror

The string formatting methods with "f"

Hi, everybody.

I tried using string formatting methods with "f". 

bro_name = "firstname"
bro_surname = "surname"
bro_age = "six"
bro_info = f"{firstname} {surname.upper()}, {six}."
print(bro_info)

But I'm new to Python programming and don't understand why something went wrong.

Traceback (most recent call last):
File "C:/Users/xxx_/PycharmProjects/anaisproject/string.py", line 25, in module
bro_info = f"{firstname} {surname.upper()}, {six}."
NameError: name 'firstname' is not defined

Thank you in advance for your advice.

Solution

  • firstname and surname are the strings that are placed in variables bro_firstname and bro_surname. You was writing non-existant variable names - prepend bro_ to them, because you named the variables like that.