[Python-3000] PEP 3101 Updated (original) (raw)

Talin talin at acm.org
Thu Aug 16 05:13:20 CEST 2007

Eric Smith wrote:

James Thiele wrote:

The section on the explicit conversion flag contains the following line:

These flags are typically placed before the format specifier: Where else can they be placed? I'd like this to say they can only be placed where the PEP describes them, or maybe to be only at the end. "{0!r:20}".format("Hello") or "{0:20!r}".format("Hello") Putting them at the end makes the parsing easier, although I grant you that that's not a great reason for specifying it that way. Whatever it is, I think there should be only one place they can go.

Guido expressed a definite preference for having them be first.

Also there is no description of what action (if any) is taken if an unknown explicit conversion flag is encoubtered. I would assume a ValueError, but yes, it should be explicit.

This is one of those things I leave up to the implementor and then document later :)

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