具体实现方法如下:

def addWord(theIndex,word,pagenumber):
  theIndex.setdefault(word, [ ]).append(pagenumber)#存在就在基础上加入列表,不存在就新建个字典key 
  
  d = {"hello":[3]}
  #d = {}
  addWord(d,"hello",3)
  addWord(d,"hello",56)
  addWord(d,"nihao",24)
  print d

本文测试环境为Python2.7.6

程序运行结果如下:

{'nihao': [24], 'hello': [3, 3, 56]}

  

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