On 7/19/2018 11:22 AM, Calvin Spealman wrote:
If its treated as a missing parameter, and currently doesn't do anything, then it wouldn't be used... right? and it could be safe to add behavior for it... right?
It currently does something: it replaces all instances, just as if you hadn't supplied a count (see my example below). You can't change its behavior.
Eric
On Thu, Jul 19, 2018 at 11:17 AM, Eric V. Smith <e...@trueblade.com <mailto:e...@trueblade.com>> wrote:On 7/19/2018 10:01 AM, Calvin Spealman wrote: As an alternative suggestion: What if the count parameter to str.replace() counted from the right with negative values? That would be consistent with other things like indexing and slicing. We couldn't make this change because negative values already have a meaning: it's interpreted as a missing parameter: >>> 'abab'.replace('a', 'z') 'zbzb' >>> 'abab'.replace('a', 'z', 0) 'abab' >>> 'abab'.replace('a', 'z', 1) 'zbab' >>> 'abab'.replace('a', 'z', -1) 'zbzb' >>> 'abab'.replace('a', 'z', -2) 'zbzb' >>> 'abab'.replace('a', 'z', -100) 'zbzb' I think .rreplace() is the better design. Eric
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