String format - resolve placeholders names

[Peter Otten]

Ervin Hegedüs wrote:

> Python has a good string formatter, eg. I can do this:
> 
> s = "{who} likes {what}"
> d = {'who': "Adam", 'what': "ants"}
> s.format(**d)
> 
> result:
> 'Adam likes ants'
> 
> Is it possible, and if yes, how to resolve the placeholders names
> in string?

>>> import string
>>> for item in string.Formatter().parse("{who} likes {what}"):
...     print(item)
... 
('', 'who', '', None)
(' likes ', 'what', '', None)