Truncate to three decimals in Python

Question

How do I get 1324343032.324?

As you can see below, the following do not work:

>>1324343032.324325235 * 1000 / 1000
1324343032.3243253
>>i         


        

Answer 1

a = 1.0123456789
dec = 3 # keep this many decimals
p = 10 # raise 10 to this power
a * 10 ** p // 10 ** (p - dec) / 10 ** dec
>>> 1.012