[Python-Dev] transitioning from % to {} formatting

[Vinay Sajip]

Antoine Pitrou <solipsis <at> pitrou.net> writes:

> 
> Vinay Sajip <vinay_sajip <at> yahoo.co.uk> writes:
> > 
> > >>> "%0#8x" % 0x1234
> > '0x001234'
> > >>> "{0:0>#8x}".format(0x1234)
> > '000x1234'
> 
> Apart from the sheer unreadability of the {}-style format string, the result 
> looks rather unexpected from a human being's point of view.
> 
> (in those situations, I would output the 0x manually anyway, such as:
> >>> "0x%06x" % 0x1234
> '0x001234'
> >>> "0x{:06x}".format(0x1234)
> '0x001234'
> )
> 

Well of course, but I asked the question in the context of providing an
*automatic* converter from %-format strings to {}-format. At the moment, it
doesn't seem like a 100%-faithful automatic conversion is feasible.

Regards,

Vinay Sajip