python f string decimal places

>>> a = 10.1234
>>> f'{a:.2f}'
'10.12'

>>> a = 10.1234
>>> f'{a:.2f}'
'10.12'

>>> foobar = 3.141592
>>> print(f'My number is {foobar:.2f} - look at the nice rounding!')

My number is 3.14 - look at the nice rounding!

>>> number1 = 10.1234
>>> f'{number1:.2f}'
'10.12'

print "%.2f" % 5