Re: [Tutor] floats

[Emile van Sebille]

On 12/3/2010 10:52 AM Christopher Spears said...

I have a float variable that is very long.

float_a = 1.16667

However, I want to pass the value of float_a to float_b, but I want the float 
to be accurate to two decimal points.

float_a = 1.16667
print "%.2f" % float_a

1.17

I tried the following:

float_b = "%.2f" % float_a
float_b

'1.17'

type(float_b)

<type 'str'>

This doesn't work because it yields a string.

Any suggestions?

If you want control over the precision I'd use the decimal module.

>>> x
1.1666666699999999
>>> y = decimal.Decimal("%.2f" % x)
>>> y
Decimal('1.17')
>>>


Emile

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