dict2：

{'一起': 0.20100756305184242,
 '萬塊': 0.20100756305184242,
 '三人': 0.20100756305184242,
 '下海經(jīng)商': 0.20100756305184242,
 '東挪西撮': 0.10050378152592121,
 '事對': 0.10050378152592121,
 '以沫': 0.10050378152592121,
 '分開': 0.10050378152592121,
 '前一晚': 0.10050378152592121,
 '縣長': 0.10050378152592121,
 '喝酒': 0.10050378152592121,
 '回憶起': 0.10050378152592121,
 '困難': 0.10050378152592121,
 '容易': 0.10050378152592121,
 '對不起': 0.20100756305184242,
 '很大': 0.10050378152592121,
 '時期': 0.10050378152592121,
 '易學(xué)習(xí)': 0.40201512610368484,
 '有福': 0.10050378152592121,
 '李達(dá)康': 0.20100756305184242,
 '沙瑞金': 0.20100756305184242,
 '沒想到': 0.10050378152592121,
 '王大路': 0.502518907629606,
 '百姓': 0.10050378152592121,
 '相助': 0.10050378152592121,
 '胸懷': 0.10050378152592121,
 '覺得': 0.20100756305184242,
 '觸動': 0.10050378152592121,
 '話別': 0.10050378152592121,
 '賠禮道歉': 0.10050378152592121,
 '贊嘆': 0.10050378152592121,
 '這件': 0.10050378152592121,
 '道口縣': 0.10050378152592121,
 '金山': 0.10050378152592121,
 '降職': 0.10050378152592121,
 '風(fēng)生水起': 0.10050378152592121}

for key,value in dict2.items():

if dict2[key]<0.2:

dict2.pop(key)

dict2

---------------------------------------------------------------------------
RuntimeError                              Traceback (most recent call last)
<ipython-input-58-d6f876cfc345> in <module>
----> 1 for key,value in dict2.items():
      2     if dict2[key]<0.2:
      3         dict2.pop(key)
      4 dict2

RuntimeError: dictionary changed size during iteration