[EMAIL PROTECTED] skrev: > Hi, > I have a string '((1,2), (3,4))' and I want to convert this into a > python tuple of numbers.
I think your question is deeper and more natural than is clear from the many recepies given so far in this thread, so I'll take on another point of view, >From a language design perspective, there is no reason why not the parsing capacity of the Python interpreter would be accessible in a modular fashion to the user/programmer. E.g used like this: I an imaginable Python, define you expect for an answer. In this case: (1) # import junctions, types from maybefuture:-) string = ((1,2), (3,4)) type a = tuple a | int myTuple = eval(string, goal=a) Obviously, if you expect _only_ the given form, then this might be better: (2) # import types from maybefuture:-) type a = ((int,int),(int,int)) myTuple = eval(string, goal=a) Note the use of a "a|b" in line 2 (I think Perl 6 is among the few programming languages giving a reasonable semantics to junctions so far). Version 2 above sholud not be a big addition to Python conceptually. Motivation: It is easy to think clearly about. It makes it easier to use eval safely and makes code more readable. This is a topic of interest to me, so feel free to post either on list or directly to me. Thanks/Henning -- http://mail.python.org/mailman/listinfo/python-list
