Python Fstring formatting
- f - string is the latest python string formatting addition, added in 3.5
an f-string is created by prefixing the string with a f e.g.
f"this is a f-string"
Examples of f-strings
numbers f'{value:{width}.{precision}f}'
a= 10.1234 >>> f'{a:.2f}' '10.12' >>> f'{a*1000:,.2f}' '10,123.40' >>> f'{75.765367:.0f}' '76'
date
>>> f'test-{datetime.datetime.now():%Y-%m-%d_%H:%M:%S}.txt' 'test-2019-01-29_17:53:37.txt'
unix date time stamp ( seconds since 1970-01-01 )
f"{datetime.datetime.utcnow():%s}"