dynamic f-string example

[DeaD_EyE]

The normal format-method does not allow function calls.
The object is still an str, still has the method upper, which
is also visible with dot-access in the string, but a call is not possible.
Before you send your values to the format method, you have to do all calls there or before.

silly = 'crazy'
exs = [
    "hellp {silly} world",
    "hey {silly}, this script is {silly_capital}!",
    "1 + 1 = {result} ... how {silly}!",
    ]
for ex in exs:
    result = ex.format(silly=silly, silly_capital=silly.upper(), result=2)
    print(result)

Or if all information are available:

a = 1
b = 1
x = a + b
silly = 'crazy'
exs = [
    f"hellp {silly} world",
    f"hey {silly}, this script is {silly.upper()}!",
    f"{a} + {b} = {x} ... how {silly}!",
    ]
for ex in exs:
    print(ex)

In the case you have to call this repeating, you can wrap it into a function:

def foo(a, b, silly):
    x = a + b
    exs = [
        f"hellp {silly} world",
        f"hey {silly}, this script is {silly.upper()}!",
        f"{a} + {b} = {x} ... how {silly}!",
        ]
    for ex in exs:
        print(ex)