python字典排序

1.合成字典
2.按键值排序
3.reverse=False升序
4.key=lambda x:x[1]
5.dict1.items()
6.dict(d_order)

In [1]: a=range(1,11)

In [2]: b=range(21,11,-1)

In [3]: b
Out[3]: range(21, 11, -1)

In [4]: list(b)
Out[4]: [21, 20, 19, 18, 17, 16, 15, 14, 13, 12]

In [5]: dict1=dict(zip(a,b))

In [6]: dict1
Out[6]: {1: 21, 2: 20, 3: 19, 4: 18, 5: 17, 6: 16, 7: 15, 8: 14, 9: 13, 10: 12}

In [7]: dict1.items
Out[7]: <function dict.items>

In [8]: dict1.iteritems
---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
<ipython-input-8-f967eb54c173> in <module>
----> 1 dict1.iteritems

AttributeError: 'dict' object has no attribute 'iteritems'

In [9]: d_order=sorted(dict1.items(),key=lambda x:x[1],reverse=False)

In [10]: d_order
Out[10]:
[(10, 12),
 (9, 13),
 (8, 14),
 (7, 15),
 (6, 16),
 (5, 17),
 (4, 18),
 (3, 19),
 (2, 20),
 (1, 21)]

In [11]: dict(d_order)
Out[11]: {10: 12, 9: 13, 8: 14, 7: 15, 6: 16, 5: 17, 4: 18, 3: 19, 2: 20, 1: 21}

In [12]:

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