json serialiser errors with numpy int64 #83439

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1. TonyHirst

   added

   3.7 (EOL)end of lifeend of life

   stdlibStandard Library Python modules in the Lib/ directoryStandard Library Python modules in the Lib/ directory

   on Jan 8, 2020
2. TonyHirst commented on Jan 8, 2020

   

   TonyHirstmannequin

   on Jan 8, 2020

   MannequinAuthor

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   import json
   import numpy as np
   
   json.dumps( {'int64': np.int64(1)})
   
   TypeError: Object of type int64 is not JSON serializable 
   ---------------------------------------------------------------------------
   TypeError                                 Traceback (most recent call last)
   <ipython-input-67-e2b056f3a557> in <module>
   ----> 1 json.dumps( {'int64': np.int64(1)})
   
   /usr/local/Cellar/python/3.7.5/Frameworks/Python.framework/Versions/3.7/lib/python3.7/json/__init__.py in dumps(obj, skipkeys, ensure_ascii, check_circular, allow_nan, cls, indent, separators, default, sort_keys, **kw)
       229         cls is None and indent is None and separators is None and
       230         default is None and not sort_keys and not kw):
   --> 231         return _default_encoder.encode(obj)
       232     if cls is None:
       233         cls = JSONEncoder
   
   /usr/local/Cellar/python/3.7.5/Frameworks/Python.framework/Versions/3.7/lib/python3.7/json/encoder.py in encode(self, o)
       197         # exceptions aren't as detailed.  The list call should be roughly
       198         # equivalent to the PySequence_Fast that ''.join() would do.
   --> 199         chunks = self.iterencode(o, _one_shot=True)
       200         if not isinstance(chunks, (list, tuple)):
       201             chunks = list(chunks)
   
   /usr/local/Cellar/python/3.7.5/Frameworks/Python.framework/Versions/3.7/lib/python3.7/json/encoder.py in iterencode(self, o, _one_shot)
       255                 self.key_separator, self.item_separator, self.sort_keys,
       256                 self.skipkeys, _one_shot)
   --> 257         return _iterencode(o, 0)
       258 
       259 def _make_iterencode(markers, _default, _encoder, _indent, _floatstr,
   
   /usr/local/Cellar/python/3.7.5/Frameworks/Python.framework/Versions/3.7/lib/python3.7/json/encoder.py in default(self, o)
       177 
       178         """
   --> 179         raise TypeError(f'Object of type {o.__class__.__name__} '
       180                         f'is not JSON serializable')
       181 
   
   TypeError: Object of type int64 is not JSON serializable
   
   ```\`
   
3. TonyHirst commented on Jan 8, 2020

   

   TonyHirstmannequin

   on Jan 8, 2020

   MannequinAuthor

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   Apols - this is probably strictly a numpy issue.

   See: numpy/numpy#12481
4. TonyHirst commented on Jan 8, 2020

   

   TonyHirstmannequin

   on Jan 8, 2020

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   Previously posted issue: https://bugs.python.org/issue22107
5. TonyHirst commented on Jan 8, 2020

   

   TonyHirstmannequin

   on Jan 8, 2020

   MannequinAuthor

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   Argh: previous was incorrect associated issue: correct issue: https://bugs.python.org/issue24313
6. tirkarthi commented on Jan 8, 2020

   

   tirkarthi

   on Jan 8, 2020

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   Closing it as duplicate.
7. tirkarthi

   closed this as completedon Jan 8, 2020
8. tirkarthi

   closed this as completedon Jan 8, 2020
9. ezio-melotti

   transferred this issue fromon Apr 10, 2022