string interpolation syntactic sugar

[hartmut Goebel]

Skip Montanaro (skip at mojam.com) schrieb:

 >Referring to
 >
 >    "a %(x)s b %(y)s" % locals()
 >and
 >    "a %(x)s b %(y)s" % obj.__dict__
 >
 >Hartmut asks:
 >
 >    How efficient is this?
 >
 >Efficient enough. ;-)

Oh, I should have been more verbose:

Beening brand new to Python, I may miss some information yet :-) But I
suppose, local() generates a new tuple. This may be quite unefficient.

 >You have to count format
 >elements from the beginning of the format string to the point at which you
 >want the new % thingie, then do the same in the tuple of substitution
 >values.  An error-prone exercise, to be sure, especially if the values are
 >more complex (function calls with multiple arguments, yadda, yadda, yadda).

Sure, that's why I'm pretty happy to have this "interpolate" feature right
now :-)

 >Skip Montanaro | http://www.mojam.com/

+++hartmut