Python常用内建模块

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>>> from datetime import datetime
>>> now = datetime.now() # 获取当前datetime
>>> print(now)
2015-05-18 16:28:07.198690
>>> print(type(now))

>>> from datetime import datetime
>>> now = datetime.now()
>>> print(now.strftime('%a, %b %d %H:%M'))
Mon, May 05 16:28

# [‘a’, ‘b’, ‘c’]
# 输出
# [‘a’, ‘b’, ‘c’] [‘a’, ‘c’, ‘b’] [‘b’, ‘a’, ‘c’] [‘b’, ‘c’, ‘a’] [‘c’, ‘a’, ‘b’] [‘c’, ‘b’, ‘a’]
import itertools

def permutation(li):
    print(list(itertools.permutations(li)))