On Mon, 06 Dec 2010 06:15:06 +0000, Tim Harig wrote: >> But isn't explicit string literal concatenation better than implicit >> string literal concatenation? > > So add the "+", it really doesn't change it much.
Perhaps not *much*, but it *may* change it a bit. Implicit concatenation of literals is promised to be handled by the compiler, at compile time: >>> from dis import dis >>> dis(compile("s = 'hello' 'world'", "", "single")) 1 0 LOAD_CONST 0 ('helloworld') 3 STORE_NAME 0 (s) 6 LOAD_CONST 1 (None) 9 RETURN_VALUE This holds all the way back to Python 1.5 and probably older. But explicit concatenation may occur at run-time, depending on the implementation and the presence or absence of a keyhole optimizer. E.g. in Python 2.4: >>> dis(compile("s = 'hello' + 'world'", "", "single")) 1 0 LOAD_CONST 0 ('hello') 3 LOAD_CONST 1 ('world') 6 BINARY_ADD 7 STORE_NAME 0 (s) 10 LOAD_CONST 2 (None) 13 RETURN_VALUE A small difference, but a real one. -- Steven -- http://mail.python.org/mailman/listinfo/python-list