Steve Holden wrote: > Roel Schroeven wrote: >> Adam W. schreef: >>> After a fair amount of troubleshooting of why my lists were coming >>> back a handful of digits short, and the last digit rounded off, I >>> determined the str() function was to blame: >>> >>>>>> foonum >>> 0.0071299720384678782 >>>>>> str(foonum) >>> '0.00712997203847' >>> >>> Why in the world does str() have any business rounding my numbers, and >>> how do I get around this? >> >> You could use repr() instead of str() (AFAIK that's what the >> interactive interpreter used to print your foonum), but in any case >> you should be aware of the limits inherent in floating point >> arithmetic and in conversions between decimal and binary fractions. >> See e.g. http://docs.python.org/tut/node16.html >> >> > I should also point out that the subject line for this thread is > inaccurate, as it wasn't rounding ints at all. > > regards > Steve
What are they teaching in schools these days? I see questions like this and the equally perplexing "why don't floats represent numbers exactly?" or the mildy amusing "how do I write bytes not characters to a file" questions at least once a week on this forum. -Larry -- http://mail.python.org/mailman/listinfo/python-list
