save_features() Object of type Categorical is not JSON serializable

[wanalytics8]

Hi,

when I run featuretools.save_features(feature_def,f),

If I used a default dataset, it's working fine.

If I used feature_def generated from my own data, I got:

with GPT prompt, I checked exported feature from the default dataset, it also has:
"metadata": {"dataframe_name": "transactions", "entityset_id": "transactions"}}, {"name": "product_id", "ordinal": 3, "use_standard_tags": true, "logical_type": {"parameters": {}, "type": "Categorical"},

so still don't have a clue...

Any inputs appreciated, thanks!

---

TypeError Traceback (most recent call last)
Cell In[107], line 8
6 print(type(feature_defs_1),type(transformed_features),feature_defs_1[:5],transformed_features[:5])
7 with open(filepath,'w+') as f:
----> 8 ft.save_features(transformed_features,f)

File /opt/conda/lib/python3.10/site-packages/featuretools/feature_base/features_serializer.py:62, in save_features(features, location, profile_name)
10 def save_features(features, location=None, profile_name=None):
11 """Saves the features list as JSON to a specified filepath/S3 path, writes to an open file, or
12 returns the serialized features as a JSON string. If no file provided, returns a string.
13
(...)
60 :func:.load_features
61 """
---> 62 return FeaturesSerializer(features).save(location, profile_name=profile_name)

File /opt/conda/lib/python3.10/site-packages/featuretools/feature_base/features_serializer.py:104, in FeaturesSerializer.save(self, location, profile_name)
102 json.dump(features_dict, f)
103 else:
--> 104 json.dump(features_dict, location)

File /opt/conda/lib/python3.10/json/init.py:179, in dump(obj, fp, skipkeys, ensure_ascii, check_circular, allow_nan, cls, indent, separators, default, sort_keys, **kw)
173 iterable = cls(skipkeys=skipkeys, ensure_ascii=ensure_ascii,
174 check_circular=check_circular, allow_nan=allow_nan, indent=indent,
175 separators=separators,
176 default=default, sort_keys=sort_keys, **kw).iterencode(obj)
177 # could accelerate with writelines in some versions of Python, at
178 # a debuggability cost
--> 179 for chunk in iterable:
180 fp.write(chunk)

File /opt/conda/lib/python3.10/json/encoder.py:431, in _make_iterencode.._iterencode(o, _current_indent_level)
429 yield from _iterencode_list(o, _current_indent_level)
430 elif isinstance(o, dict):
--> 431 yield from _iterencode_dict(o, _current_indent_level)
432 else:
433 if markers is not None:

File /opt/conda/lib/python3.10/json/encoder.py:405, in _make_iterencode.._iterencode_dict(dct, _current_indent_level)
403 else:
404 chunks = _iterencode(value, _current_indent_level)
--> 405 yield from chunks
406 if newline_indent is not None:
407 _current_indent_level -= 1

File /opt/conda/lib/python3.10/json/encoder.py:405, in _make_iterencode.._iterencode_dict(dct, _current_indent_level)
403 else:
404 chunks = _iterencode(value, _current_indent_level)
--> 405 yield from chunks
406 if newline_indent is not None:
407 _current_indent_level -= 1

[... skipping similar frames: _make_iterencode.<locals>._iterencode_dict at line 405 (1 times)]

File /opt/conda/lib/python3.10/json/encoder.py:405, in _make_iterencode.._iterencode_dict(dct, _current_indent_level)
403 else:
404 chunks = _iterencode(value, _current_indent_level)
--> 405 yield from chunks
406 if newline_indent is not None:
407 _current_indent_level -= 1

File /opt/conda/lib/python3.10/json/encoder.py:325, in _make_iterencode.._iterencode_list(lst, _current_indent_level)
323 else:
324 chunks = _iterencode(value, _current_indent_level)
--> 325 yield from chunks
326 if newline_indent is not None:
327 _current_indent_level -= 1

File /opt/conda/lib/python3.10/json/encoder.py:405, in _make_iterencode.._iterencode_dict(dct, _current_indent_level)
403 else:
404 chunks = _iterencode(value, _current_indent_level)
--> 405 yield from chunks
406 if newline_indent is not None:
407 _current_indent_level -= 1

File /opt/conda/lib/python3.10/json/encoder.py:405, in _make_iterencode.._iterencode_dict(dct, _current_indent_level)
403 else:
404 chunks = _iterencode(value, _current_indent_level)
--> 405 yield from chunks
406 if newline_indent is not None:
407 _current_indent_level -= 1

File /opt/conda/lib/python3.10/json/encoder.py:438, in _make_iterencode.._iterencode(o, _current_indent_level)
436 raise ValueError("Circular reference detected")
437 markers[markerid] = o
--> 438 o = _default(o)
439 yield from _iterencode(o, _current_indent_level)
440 if markers is not None:

File /opt/conda/lib/python3.10/json/encoder.py:179, in JSONEncoder.default(self, o)
160 def default(self, o):
161 """Implement this method in a subclass such that it returns
162 a serializable object for o, or calls the base implementation
163 (to raise a TypeError).
(...)
177
178 """
--> 179 raise TypeError(f'Object of type {o.class.name} '
180 f'is not JSON serializable')

TypeError: Object of type Categorical is not JSON serializable