> You can already do essentially that without adding a special-case string
> formatting method to the general methods we already have.
>
>>>> balls = 5
>>>> people = 3
>>>> 'The {people} people have {balls}
> balls.'.format(**locals())
> 'The 3 people have 5 balls.'
Clearly dynamic strings are much more powerful,
allowing arbitrary expressions inside. It is also
more terse and readable, since we need no dictionary.
I would probably rather liken dynamic expressions
as a little brother of computable documents in
Mathematica. It is a new kind of expression,
rather than formatting -- though it has formatting
connections.
Dynamic strings are mainly useful at time of
writing readable code before compilation.
The compiler can choose to convert it into
a string formatting expression, of course.
To efficiently format strings at runtime,
the best choice (especially
for safty reasons) is string formatting,
not evaluating a dynamic string.
On the implementation, I would suppose new
syntax is needed (though very small).
Yingjie
--
http://mail.python.org/mailman/listinfo/python-list
