At 05:37 AM 9/7/2006, Andrei wrote:
>Dick Moores <rdm <at> rcblue.com> writes:
>
> > (2) Is my roundingN() function OK? Is there a better way to write it?
> > Will the line
> >
> > n = round(float(n)*(10**rounding))/(10**rounding)
>
>Using format strings is easier I think. "%.2f" % 2.34234 will give '2.34'.
I had mistakenly believed that format strings could be used only in
print expressions!
So now that I know better, I'm trying to write the beginnings of a
general setPrecision() function using format strings. However, it
appears that a variable cannot be used instead of the ".2" in
"%.2f" % 2.234234
def setPrecision(n, precision):
n = str(n)
p = precision
if "." in n:
n = "%.pf" % float(n)
n = str(n)
return n
n = 2.234234
precision = 2
print setPrecision(n, precision)
This get the error:
ValueError: unsupported format character 'p' (0x70) at index 2
How to do this?
Dick
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