How can I put only value after decimal

I have got output and I want to use only three values开发者_开发问答 after decimal. How can i do that in Python?

Use the following:

"%.3f" % x

it converts your number to a string with three decimal places.

In Python 2.6 or newer you should use the str.format method:

>>> x = 15.23432
>>> '{0:.3f}'.format(x)
'15.234'

round(number, 3)

http://docs.python.org/tutorial/floatingpoint.html