A Dictionary in a Dictionary Syntax

[TomToad]

Problem is that you have strings within a string. Python can't tell where one begins and the other one ends. you have three ways to fix this.
1. change the outer string from double quotes to single quotes.

    full_name = f'{user_info["first"]} {user_info["last"]}'

2. change the inner strings to use single quotes

    full_name = f"{user_info['first']} {user_info['last']}"

3. use the format() method

    full_name = "{} {}".format(user_info["first"],user_info["last"])