> I've never liked the "".join([]) idiom for string concatenation; in my > opinion it violates the principles "Beautiful is better than ugly." and > "There should be one-- and preferably only one --obvious way to do it.". > (And perhaps several others.) To that end I've submitted patch #1569040 > to SourceForge: > > http://sourceforge.net/tracker/index.php?func=detail&aid=1569040&group_id=5470&atid=305470 > This patch speeds up using + for string concatenation.
yay! i'm glad to see this. i hate the "".join syntax. i still write that as string.join() because thats at least readable). it also fixes the python idiom for fast string concatenation as intended; anyone whos ever written code that builds a large string value by pushing substrings into a list only to call join later should agree. mystr = "prefix" while bla: #... mystr += moredata is much nicer to read than mystr = "prefix" strParts = [mystr] while bla: #... strParts.append(moredata) mystr = "".join(strParts) have you run any generic benchmarks such as pystone to get a better idea of what the net effect on "typical" python code is? _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
