New submission from Serge Stroobandt: In https://docs.python.org/2/library/string.html#formatstrings the proprietary (IBM) specifcation "Decimal Arithmetic Specification" http://www.gobosoft.com/eiffel/gobo/math/decimal/daconvs.html is incorrectly being heralded as "the" specifiaction for engineering notation.
However, upon reading this IBM specifation carefully, one will note that the specifaction itself actually admits not applying the engineering notation in the case of infinite numbers. An emphasized version of the exact quote accompanied with a discussion can be found here: http://stackoverflow.com/a/17974598/2192488 Correct behaviour for decimal.to_eng_string() would be to equally employ engineering notation in the case of infinite numbers. I suggest renaming the current behaviour to decimal.to_ibm_string(). References: http://www.augustatech.edu/math/molik/notation.pdf https://en.wikipedia.org/wiki/Engineering_notation https://en.wikipedia.org/wiki/General_Conference_on_Weights_and_Measures http://www.bipm.org/en/CGPM/db/11/11/ PS: I am a MSc in Electronic Engineering. ---------- components: Extension Modules files: engineering_notation.pdf messages: 259047 nosy: Keith.Brafford, eric.smith, ezio.melotti, serge.stroobandt priority: normal severity: normal status: open title: decimal.to_eng_string() does not implement engineering notation in all cases. type: behavior versions: Python 2.7 Added file: http://bugs.python.org/file41730/engineering_notation.pdf _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue26223> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
