Re: [Python-Dev] PATCH submitted: Speed up + for string concatenation, now as fast as "".join(x) idiom

Steve Holden wrote:

instance.method(*args) <==> type.method(instance, *args)

You can nowadays spell this as str.join("", lst) - no need to import a whole module!

except that str.join isn't polymorphic:

...

...

str.join(u",", ["1", "2", "3"]) Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: descriptor 'join' requires a 'str' object but received a 'unicode' string.join(["1", "2", "3"], u",") u'1,2,3'

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