> > > Personally what I find is perverse is that .join is a method of > strings > but does NOT call str() on the items to be joined.
Yeah, that's a good reason to use .format when you have a fixed number of arguments. "{}, {}, {}, {}".format(some, random, stuff, here) And then there is map. Otherwise .join is very common on iterables like '\n'.join(make_string(object) for object in something) '\n'.join(map(make_string, something)) '\n'.join(map(str, nonstr)) '\n'.join('{}: {}'.format(x, y) for x,y in blabla) '\n'.join(map('[{}]'.format, stuff)) A "join format" construct is very typical in codes producing strings from iterable. I agree on the part "a list doesn't always contain string so why would it have a join method".
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