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Wed Oct 7 19:21:53 CEST 2009 · https://mail.python.org/pipermail/python-dev/2009-October/092711.html

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'
)

Regards

Antoine.

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