python - How to fix floating point decimal to two places even if number is 2.00000 -

this have:
x = 2.00001

this need:
x = 2.00

i using:
float("%.2f" % x)

but is:
2

how can limit decimal places 2 , make sure there 2 decimal places if zero?
note: not want final output string.

this works:

'%.2f" % float(x) 

previously answered this:

how this?

def fmt2decimals(x):   s = str(int(x*100))   return s[0:-2] + '.' + s[-2:] 

afaik can't trailing zeros format specification %.2f.