On Tuesday, July 21, 2015 at 10:22:44 AM UTC-7, Antoon Pardon wrote: > On 07/19/2015 07:39 AM, Steven D'Aprano wrote: > > In Python 2, integer literals with leading zeroes are treated as octal, so > > 09 is a syntax error and 010 is 8. > > > > This is confusing to those not raised on C-style octal literals, so in > > Python 3 leading zeroes are prohibited in int literals. Octal is instead > > written using the prefix 0o, similar to hex 0x and binary 0b. > > > > Consequently Python 3 makes both 09 and 010 a syntax error. > > > > However there is one exception: zero itself is allowed any number of leading > > zeroes, so 00000 is a legal way to write zero as a base-10 int literal. > > > > Does anyone use that (mis)feature? > > > > Yes. I like to sometime write numbers with leading zeros. > Sometimes these numbers represent codeblocks of a fixed > number of digits. Always writing those numbers with this > number of digits helps being aware of this. It is also > easier for when you need to know how many leading zero's > such a number has.
IMO, leading zeroes just looks like visual noise, and if I wanted to align numbers, I'd just use spaces. -- https://mail.python.org/mailman/listinfo/python-list
