如何通過地圖或lambda功能

Question

現在，我得到的字典提取與密鑰字典的值：

d = {'key1': 
     {'key11':1, 
     'key12':2}, 
    'key2': 
     {'key21':3, 
     'key22':4} 
    } 

如何解壓到元組的列表：

l = [('key1','key11',1), 
    ('key1','key12',2), 
    ('key2','key21',3), 
    ('key2','key22',4)] 

使用地圖或lambda功能
我的Python版本是Python2.7

Answer 1

您可以使用列表解析，讓你想

輸出

print [(k, k1, d[k][k1]) for k in d for k1 in d[k]] 

輸出

[('key2', 'key22', 4), 
('key2', 'key21', 3), 
('key1', 'key12', 2), 
('key1', 'key11', 1)] 

如果你想輸出進行排序，因爲你的問題，

print sorted([(k, k1, d[k][k1]) for k in d for k1 in d[k]]) 

輸出

[('key1', 'key11', 1), 
('key1', 'key12', 2), 
('key2', 'key21', 3), 
('key2', 'key22', 4)]