用途
str.join：
>>> tup = ('a', 'b', 'c', 'd', 'g', 'x', 'r', 'e')>>> ''.join(tup)'abcdgxre'>>>>>> help(str.join)Help on method_descriptor:join(...) S.join(iterable) -> str Return a string which is the concatenation of the strings in the iterable. The separator between elements is S.>>>
