[Python-Dev] transitioning from % to {} formatting (original) (raw)
Raymond Hettinger python at rcn.com
Fri Oct 2 20:56:54 CEST 2009
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[Steven Bethard]
. Just saying "ok, switch your format strings from % to {}" didn't work in Python 3.0 for various good reasons, and I can't imagine it will work in Python 4.0 unless we have a transition plan.
Do the users get any say in this? I imagine that some people are heavily invested in %-formatting.
Because there has been limited uptake on {}-formatting (afaict), we still have limited experience with knowing that it is actually better, less error-prone, easier to learn/rember, etc. Outside a handful of people on this list, I have yet to see anyone adopt it as the preferred syntax.
Raymond
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