python 字典套字典或列表的示例

文件f1A1aA1bA2CB2aB2b生成如下字典：tdict={'A':{1:['a','b'],2:['C']},'B':{2:['a','b']}}In[22]:tdict={}In[23]:f=o

文件f1

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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