[Python-Dev] transitioning from % to {} formatting (original) (raw)

Vinay Sajip vinay_sajip at yahoo.co.uk
Thu Oct 1 08:59:40 CEST 2009


Vinay Sajip <vinay_sajip yahoo.co.uk> writes:

#Just typing this in, it's not tested or anything class DollarMessage: def init(self, fmt, *args, **kwargs): self.fmt = fmt self.args = args self.kwargs = kwargs

def str(self): return string.Template(self.fmt).substitute(*args, **kwargs)

Whoops, sorry, pressed the "post" button by accident on my previous post. The above substitute call should of course say

string.Template(self.fmt).substitute(*self.args, **self.kwargs)

and you can alias DollarMessage (or whatever name you choose) as _ or __, say.

As far as the Formatter formatting goes, it's easy enough to subclass Formatter to format using whatever approach you want.

Regards,

Vinay Sajip



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