python format number code example

Example 1: format to 2 or n decimal places python

num = 123.4567
formatted_num = '{0:.2f}'.format(num) # to 2 decimal places
# formatted_num = '123.46'

Example 2: python format float

>>> x = 13.949999999999999999
>>> x
13.95
>>> g = float("{:.2f}".format(x))
>>> g
13.95
>>> x == g
True
>>> h = round(x, 2)
>>> h
13.95
>>> x == h
True

Example 3: python format numeric output

for x in numbers:
    print "{:10.4f}".format(x)
prints

   23.2300
    0.1233
    1.0000
    4.2230
 9887.2000

Example 4: format number differences in python

# make the total string size AT LEAST 9 (including digits and points), fill with zeros to the left
'{:0>9}'.format(3.499)
# >>> '00003.499'

Example 5: python integer to string format

'{:d}'.format(42)