f"{} " 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}')