python 字典套字典或列表的示例
文件f1
| A | 1 | a |
| A | 1 | b |
| A | 2 | C |
| B | 2 | a |
| B | 2 | b |
生成如下字典：
tdict={'A':{1:['a','b'], 2:['C']}, 'B':{2:['a','b']} }
In [22]: tdict={}
In [23]: f=open('f1')
In [24]: while True:
...: line=f.readline().strip()
...: if not line:
...: break
...: pos1=line.split()[0]
...: pos2=line.split()[1]
...: pos3=line.split()[2]
...: if pos1 not in tdict:
...: tdict[pos1]={}
...: tdict[pos1][pos2]=[pos3]
...: else:
...: if pos2 not in tdict[pos1]:
...: tdict[pos1][pos2]=[pos3]
...: else:
...: tdict[pos1][pos2].append(pos3)
...:
In [25]: f.close()
In [26]: tdict
Out[26]: {'A': {'1': ['a', 'b'], '2': ['C']}, 'B': {'2': ['a', 'b']}}
In [27]: tdict['B']['2']
Out[27]: ['a', 'b']
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