On Tue, Apr 26, 2011 at 3:21 AM, Rob Cliffe <[email protected]> wrote: >>>> type (3.) > <type 'float'> >>>> 3..__class__ > <type 'float'> >>>> type(3) > <type 'int'> >>>> 3.__class__ > File "<stdin>", line 1 > 3.__class__ > ^ > SyntaxError: invalid syntax > > Superficially the last example ought to be legal syntax (and return <type > 'int'>). > Is it an oversight which could be fixed in a straightforward way, or are > there reasons why it can't?
The parser (or is it the lexer? I never remember which it is that has the problem in this case) can't handle it - it sees the first "." and expects a floating point value. It's hard to disambiguate due to 3.e10 and the like being valid floating point numbers, while 3..e10 has to be an attribute access. You have to use whitespace or parentheses to eliminate the ambiguity: 3. __class__ (3).__class__ Cheers, Nick. -- Nick Coghlan | [email protected] | Brisbane, Australia _______________________________________________ Python-Dev mailing list [email protected] http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
