On Fri, May 14, 2021 at 04:58:08PM -0000, Martin Teichmann wrote:
> Could I please see an example? This is a real question, by now I ran
> my prototyped interpreter through quite some libraries, and none made
> problems like this.
Any script or application that does calculations and formats them for
display to the user which uses print() or equivalent string formatting
such as `%s` etc will suddenly start producing output like this:
Fraction(3135227393067235, 17592186044416)
instead of the expected output:
178.217043928
Any library that uses doctests will also suffer similar issues.
> Real world examples I am talking about. Sure, I can easily code an
> approximation for pi which goes out of hand quickly, but doing this in
> Python would be just wrong unless you are writing a text book.
An approximation to pi accurate to 15 decimal places is just
Fraction(884279719003555, 281474976710656), which calculates almost
instantly and takes only 48 bytes:
>>> sys.getsizeof(Fraction(math.pi))
48
plus another 64 bytes for the numerator and denominator ints themselves.
--
Steve
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