[Python-Dev] Caching float(0.0) (original) (raw)

Terry Reedy tjreedy at udel.edu
Sun Oct 1 19:54:31 CEST 2006

"Nick Craig-Wood" <nick at craig-wood.com> wrote in message news:20061001093846.GA20938 at craig-wood.com...

On Fri, Sep 29, 2006 at 12:03:03PM -0700, Guido van Rossum wrote:

I see some confusion in this thread.

If a LITERAL 0.0 (or any other float literal) is used, you only get one object, no matter how many times it is used. For some reason that doesn't happen in the interpreter which has been confusing the issue slightly... $ python2.5 a=0.0 b=0.0 id(a), id(b) (134737756, 134737772)

Guido said a literal (emphasis shifted), reused as in a loop or function recalled, while you used a literal, then another literal, without reuse. Try a=b=0.0 instead.

Terry Jan Reedy

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