using extra { in f string python code example

Example 1: python f string

>>> name = "Eric"
>>> age = 74
>>> f"Hello, {name}. You are {age}."
'Hello, Eric. You are 74.'

Example 2: format specificer f strings python

#!/usr/bin/env python3

val = 12.3

print(f'{val:.2f}')
print(f'{val:.5f}')