round(flt,ndig=0) rounds a floating point number to the nearest integral number : round « Buildin Function « Python Tutorial

1. Python Tutorial
2. Buildin Function
3. round

# When the optional ndig option is given, round() will round the argument to the specific number of decimal places.

print round(3)
print round(3.45)
print round(3.4999999)
print round(3.4999999, 1)

import math

for eachNum in range(10):
     print round(math.pi, eachNum)

print round(-3.5)
print round(-3.4)
print round(-3.49)
print round(-3.49, 1)