Can we use python f-string placeholder with index number? [closed]

Question

How can we achieve the following in Python 3.6 using f-string (instead of using format()) method?

quantity = 3
itemno = 567
price = 49
myorder = "I want {0} pieces of item number {1} for {2:.2f} dollars."
print(myorder.format(quantity, itemno, price))

Output:

I want 3 pieces of item number 567 for 49.00 dollars.

Answer 1

quantity = 3
itemno = 567
price = 49
myorder = f"I want {quantity} pieces of item number {itemno} for {price:.2f} dollars."
print(myorder)

Output:

I want 3 pieces of item number 567 for 49.00 dollars.

Explanation

The f before the string indicates an f-string. {quantity}, {itemno}, and {price:.2f}: These are placeholders where the values of quantity, itemno, and price (formatted to 2 decimal places) are inserted directly into the string.

Answer 2

F-string was added in Python 3.6 ^[python.org] so yes you can use F-string in Python 3.6 and above:

quantity = 3
itemno = 567
price = 49
myorder = F"I want {quantity} pieces of item number {itemno} for {price:.2f} dollars." #[1][2]
print(myorder)

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_{^[1] Format specifiers still remain the same.}

_{^[2] New in Python 3.12, you can now reuse the same quoting type of the outer F-string inside a replacement field when accessing dict() values using dict() keys.}