python 内置函数

https://docs.python.org/2/library/functions.html

  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()apply()delattr()help()next()setattr()buffer()dict()hex()object()slice()coerce()dir()id()oct()sorted()intern()

abs(x)