Raymond Hettinger <raymond.hettin...@gmail.com> added the comment: Some brief research ===================
""" in numbers four or more digits long, use commas to set off groups of three digits, counting leftward from the decimal point, in the standard American style. For long decimal numbers, do not use any digit-group separators to the right of the decimal point.""" — Google Style Guide https://developers.google.com/style/numbers The CRC math handbook uses groups of five after the decimal point. See §1.2.4 in http://dl.icdst.org/pdfs/files/2a2cbcfc89598fd83c315ce45c1ee663.pdf NIST Guide for using SI units: """The digits of numerical values having more than four digits on either side of the decimal marker are separated into groups of three using a thin, fixed space counting from both the left and right of the decimal marker. For example, 15 739.012 53 is highly preferred to 15739.01253. Commas are not used to separate digits into groups of three. (See Sec. 10.5.3.)""" — page vi in https://physics.nist.gov/cuu/pdf/sp811.pdf#10.5.2 StackExchange question on the topic: https://math.stackexchange.com/questions/182775/convention-of-digit-grouping-after-decimal-point The important reference, ISO 80000:1 discusses this in section 7, "Printing rules", but the standard is not publicly available. ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue43624> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
