问题描述 
Traceback (most recent call last):
  File "extract_convert.py", line 109, in <module>
    f.write(json.dumps(d, ensure_ascii=False) + '\n')
  File "/home/pybuaa/Application/Anaconda3/envs/tf1/lib/python3.6/json/__init__.py", line 238, in dumps
    **kw).encode(obj)
  File "/home/pybuaa/Application/Anaconda3/envs/tf1/lib/python3.6/json/encoder.py", line 199, in encode
    chunks = self.iterencode(o, _one_shot=True)
  File "/home/pybuaa/Application/Anaconda3/envs/tf1/lib/python3.6/json/encoder.py", line 257, in iterencode
    return _iterencode(o, 0)
  File "/home/pybuaa/Application/Anaconda3/envs/tf1/lib/python3.6/json/encoder.py", line 180, in default
    o.__class__.__name__)
TypeError: Object of type 'int64' is not JSON serializable
错误场景：

对Numpy和Pandas结果进行json.dumps报错

错误分析：

  1. python3中没有int64这个数据类型，所有的整型都是int

  2. 报错里的int64指的是<class 'numpy.int64'>，所以很有迷惑性

解决方案：

转换成python3内置数据类型即可

比如我需做出如下修改：

i = np.argmax([len(s) for s in summaries])

????

i = int(np.argmax([len(s) for s in summaries]))