Why does the python F string module not work?

user_11723707 0
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I am making an adventure game in python 3.7.3, and I am using F strings for some of my print statements. When running it in the terminal and sublime text, F strings give me an error.

import time
from time import sleep
import sys

def printfast(str):
    for letter in str:
        sys.stdout.write(letter)
        sys.stdout.flush()
        time.sleep(0.04)

name = input("\nWhat is your name?\n\n")

printfast(f("You are the mighty hero {name}. In front of you, there is a grand palace, containing twisting marble spires and spiraling dungeons.\n")
format python-3.x python
3 Answers

You're doing it wrong. f isn't a function, it's more of an syntactic identifier. Whereas regular quotes " indicate the beginning of a regular string (or the end of any type of string), the token f" indicates the beginning of a format string in particular. The same idea goes for raw strings, indicated by r", or binary strings, indicated by b".

Instead of

f("You are...")

do

f"You are..."
user_26488110

In f("You ...), you're calling a function named f with the string as input parameter, and you don't have such a function hence the error.

You need to drop the enclosing parentheses () to make it a f-string:

f"You are the mighty hero {name}. In front of you, there is a grand palace, containing twisting marble spires and spiraling dungeons.\n"
user_37895500

f-strings are not created using a function, it's a type of string, which you denote using f'' (similar to b'' or r'')

So try using:

printfast(f"You are the mighty hero {name}. In front of you, there is a grand palace, containing twisting marble spires and spiraling dungeons.\n")
user_52981500
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