What does 'f' means before a string in Python?

Question

I\'m new here and also new to Python. I wonder what does f in print(f\'Column names are {\"-\".join(row)}\') do I tried deleting it and then \'Column n

Answer 1

String starting with f are formatted string litrals.

Suppose you have a variable:

pi = 3.14

To catenate it to a string you'd do:

s = "pi = " + str(pi)

Formatted strings come in handy here. Using them you can use this do the same:

s = f"pi = {pi}"

{pi} is simply replaced by the value in the pi