python - Getting only 1 decimal place

Question

This question already has answers here:

Limiting floats to two decimal points (29 answers)

Closed 5 years ago.

How do I convert 45.34531 to 45.3?

Answer 1

Are you trying to represent it with only one digit:

print("{:.1f}".format(number)) # Python3
print "%.1f" % number          # Python2

or actually round off the other decimal places?

round(number,1)

or even round strictly down?

math.floor(number*10)/10

Answer 2

>>> "{:.1f}".format(45.34531)
'45.3'

Or use the builtin round:

>>> round(45.34531, 1)
45.299999999999997

Answer 3

round(number, 1)