合并多个字典或映射对象

zltzlt

1. >>> from collections import ChainMap
   
2. >>> a = {'x': 3, 'z': 4}
   
3. >>> b = {'y': 5, 'z': 3}
   
4. >>> c = ChainMap(a, b)
   
5. >>> print(c)
   
6. ChainMap({'x': 3, 'z': 4}, {'y': 5, 'z': 3})
   
7. >>> print(dict(c))
   
8. {'y': 5, 'z': 4, 'x': 3}
   
9. >>> c['x']
   
10. 3
    
11. >>> c['y']
    
12. 5
    
13. >>> c['z']
    
14. 4
    
15. >>> list(c.keys())
    
16. ['y', 'z', 'x']
    
17. >>> list(c.values())
    
18. [5, 4, 3]

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fan1993423

好