python format decimal code example
Example 1: python format only 1 decimal place
>>> "{0:0.1f}".format(45.34531)
'45.3'
Example 2: print decimal formatting in python
a_float = 3.14159
formatted_float = "{:.2f}".format(a_float)
Example 3: decimal in python
>>> from decimal import *
>>> getcontext().prec = 6
>>> Decimal(1) / Decimal(7)
Decimal('0.142857')
>>> getcontext().prec = 28
>>> Decimal(1) / Decimal(7)
Decimal('0.1428571428571428571428571429')
Example 4: python 2 decimal places format
>>> 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!
Example 5: python 2 decimal places format
print "%.2f" % 5