官方内置方法：https://docs.python.org/2/library/functions.html 模块目录 | Built-in Functions | | --- | --- | --- | --- | --- | |abs()|divmod()|input()|open()|staticmethod()| |all()|enumerate()|int()|ord()|str()| |any()|eval()|isinstance()|pow()|sum()| |basestring()|execfile()|issubclass()|print()|super()| |bin()|file()|iter()|property()|tuple()| |bool()|filter()|len()|range()|type()| |bytearray()|float()|list()|raw_input()|unichr()| |callable()|format()|locals()|reduce()|unicode()| |chr()|frozenset()|long()|reload()|vars()| |classmethod()|getattr()|map()|repr()|xrange()| |cmp()|globals()|max()|reversed()|zip()| |compile()|hasattr()|memoryview()|round()|__import__()| |complex()|hash()|min()|set()| |delattr()|help()|next()|setattr()| |dict()|hex()|object()|slice()| |dir()|id()|oct()|sorted()|