Convert floating point number to a certain precision

Question

If i consider the following floating point number:  135.12345678910 and if i want to concatenate that value to a string, but only till 135.123456789. With print, I can easily do this by doing something like:

print "%.9f" % numvar
with numvar being my original number. Is there an easy way to do this?

Answer 1

With Python < 3 (e.g. 2.6 [see comments] or 2.7), there are two ways to do so.

# Option one
older_method_string = "%.9f" % numvar

# Option two
newer_method_string = "{:.9f}".format(numvar)