Python 将图形边列表转换为JSON树

Python 将图形边列表转换为JSON树,python,json,networkx,Python,Json,Networkx,我有一个元组列表,其中包含networkx中的边,保证是树状的: [('king', 'governor'), ('governor', 'editor'), ('king', 'state'), ('state', 'collapse'), ('collapse', 'coverage'), ('collapse', 'author'), ('collapse', 'opening'), ('state', 'head'), ('state', 'lord')] 它们是按深度

我有一个元组列表,其中包含
networkx
中的边,保证是树状的:

[('king', 'governor'),
 ('governor', 'editor'),
 ('king', 'state'),
 ('state', 'collapse'),
 ('collapse', 'coverage'),
 ('collapse', 'author'),
 ('collapse', 'opening'),
 ('state', 'head'),
 ('state', 'lord')]
它们是按深度优先的搜索顺序排序的,但如果这样做更容易的话,也可以按广度优先的顺序排序

我正在寻找一种将此边列表转换为JSON对象的方法。前面的例子是:

{'king': [{'governor': [{'editor': []}]},
          {'state': [{'collapse': [{'coverage': []},
                                   {'author': []},
                                   {'opening': []}]},
                     {'head': []},
                     {'lord': []}]
           }]
}
叶节点是应该像示例输出中那样表示为dict,还是仅仅表示为字符串,这取决于您。如果使用
networkx.DiGraph
比它的边列表更容易做到这一点,那么这也同样有效

感谢您的帮助

import json                                                                                                                                                                                                        

data = [('king', 'governor'),                                                                                                                                                                                      
        ('governor', 'editor'),                                                                                                                                                                                    
        ('king', 'state'),                                                                                                                                                                                         
        ('state', 'collapse'),                                                                                                                                                                                     
        ('collapse', 'coverage'),                                                                                                                                                                                  
        ('collapse', 'author'),                                                                                                                                                                                    
        ('collapse', 'opening'),                                                                                                                                                                                   
        ('state', 'head'),                                                                                                                                                                                         
        ('state', 'lord')];                                                                                                                                                                                        

root = data[0][0]                                                                                                                                                                                                  
node2chilren = {root: []}                                                                                                                                                                                          
for parent, child in data:                                                                                                                                                                                         
    childnode = {child: []}                                                                                                                                                                                        
    children = node2chilren[parent]                                                                                                                                                                                
    children.append(childnode)                                                                                                                                                                                     
    node2chilren[child] = childnode[child]                                                                                                                                                                         

jsonstr = json.dumps({root: node2chilren[root]}, indent=4)                                                                                                                                                         
print jsonstr
输出

{
    "king": [
        {
            "governor": [
                {
                    "editor": []
                }
            ]
        }, 
        {
            "state": [
                {
                    "collapse": [
                        {
                            "coverage": []
                        }, 
                        {
                            "author": []
                        }, 
                        {
                            "opening": []
                        }
                    ]
                }, 
                {
                    "head": []
                }, 
                {
                    "lord": []
                }
            ]
        }
    ]
}