# Problem quantum datasets **URL:** \ **Category:** PennyLane Help\ **Created:** [September 18, 2024, 1:05pm UTC](https://discuss.pennylane.ai/t/problem-quantum-datasets/5212 "2024-09-18T13:05:13Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![antoniotudisco](https://yyz2.discourse-cdn.com/flex012/user_avatar/discuss.pennylane.ai/antoniotudisco/32/2838_2.png) [@antoniotudisco](https://discuss.pennylane.ai/u/antoniotudisco)\ **Post date:** [September 18, 2024, 1:05pm UTC](https://discuss.pennylane.ai/t/problem-quantum-datasets/5212/1 "2024-09-18T13:05:13Z")
Hello! If applicable, put your complete code example down below. Make sure that your code: - is 100% self-contained — someone can copy-paste exactly what is here and run it to reproduce the behaviour you are observing - includes comments ```auto # Put code here import pennylane as qml [ds] = qml.data.load("other", name='hidden-manifold') ``` If you want help with diagnosing an error, please put the full error message below: ```auto # Put full error message here { "name": "JSONDecodeError", "message": "Expecting property name enclosed in double quotes: line 7 column 7 (char 90)", "stack": "--------------------------------------------------------------------------- JSONDecodeError Traceback (most recent call last) File c:\\Users\\antot\\anaconda3\\envs\\QML\\Lib\\site-packages\\requests\\models.py:971, in Response.json(self, **kwargs) 970 try: --> 971 return complexjson.loads(self.text, **kwargs) 972 except JSONDecodeError as e: 973 # Catch JSON-related errors and raise as requests.JSONDecodeError 974 # This aliases json.JSONDecodeError and simplejson.JSONDecodeError File c:\\Users\\antot\\anaconda3\\envs\\QML\\Lib\\json\\ __init__.py:346, in loads(s, cls, object_hook, parse_float, parse_int, parse_constant, object_pairs_hook, **kw) 343 if (cls is None and object_hook is None and 344 parse_int is None and parse_float is None and 345 parse_constant is None and object_pairs_hook is None and not kw): --> 346 return _default_decoder.decode(s) 347 if cls is None: File c:\\Users\\antot\\anaconda3\\envs\\QML\\Lib\\json\\decoder.py:337, in JSONDecoder.decode(self, s, _w) 333 \"\"\"Return the Python representation of ``s`` (a ``str`` instance 334 containing a JSON document). 335 336 \"\"\" --> 337 obj, end = self.raw_decode(s, idx=_w(s, 0).end()) 338 end = _w(s, end).end() File c:\\Users\\antot\\anaconda3\\envs\\QML\\Lib\\json\\decoder.py:353, in JSONDecoder.raw_decode(self, s, idx) 352 try: --> 353 obj, end = self.scan_once(s, idx) 354 except StopIteration as err: JSONDecodeError: Expecting property name enclosed in double quotes: line 7 column 7 (char 90) During handling of the above exception, another exception occurred: JSONDecodeError Traceback (most recent call last) Cell In[3], line 3 1 import pennylane as qml ----> 3 [ds] = qml.data.load(\"other\", name='mnist-pca') 4 #print(qml.data.list_datasets()) # list of available datasets 5 6 #ds.train['4']['inputs'] # points in 4-dimensional space 7 #ds.train['4']['labels'] # labels for the points above File c:\\Users\\antot\\anaconda3\\envs\\QML\\Lib\\site-packages\\pennylane\\data\\data_manager\\ __init__.py:247, in load(data_name, attributes, folder_path, force, num_threads, block_size, **params) 156 def load( # pylint: disable=too-many-arguments 157 data_name: str, 158 attributes: Optional[typing.Iterable[str]] = None, (...) 163 **params: Union[ParamArg, str, List[str]], 164 ): 165 r\"\"\"Downloads the data if it is not already present in the directory and returns it as a list of 166 :class:`~pennylane.data.Dataset` objects. For the full list of available datasets, please see 167 the `datasets website `_. (...) 245 -1.0791430411076344 246 \"\"\" --> 247 foldermap = _get_foldermap() 248 data_struct = _get_data_struct() 250 params = format_params(**params) File c:\\Users\\antot\\anaconda3\\envs\\QML\\Lib\\site-packages\\pennylane\\data\\data_manager\\ __init__.py:46, in _get_foldermap() 43 response = get(FOLDERMAP_URL, timeout=5.0) 44 response.raise_for_status() ---> 46 return FolderMapView(response.json()) File c:\\Users\\antot\\anaconda3\\envs\\QML\\Lib\\site-packages\\requests\\models.py:975, in Response.json(self, **kwargs) 971 return complexjson.loads(self.text, **kwargs) 972 except JSONDecodeError as e: 973 # Catch JSON-related errors and raise as requests.JSONDecodeError 974 # This aliases json.JSONDecodeError and simplejson.JSONDecodeError --> 975 raise RequestsJSONDecodeError(e.msg, e.doc, e.pos) JSONDecodeError: Expecting property name enclosed in double quotes: line 7 column 7 (char 90)" } ``` And, finally, make sure to include the versions of your packages. Specifically, show us the output of `qml.about()`. Name: PennyLane Version: 0.37.0 Summary: PennyLane is a cross-platform Python library for quantum computing, quantum machine learning, and quantum chemistry. Train a quantum computer the same way as a neural network. Home-page: [GitHub - PennyLaneAI/pennylane: PennyLane is a cross-platform Python library for quantum computing, quantum machine learning, and quantum chemistry. Train a quantum computer the same way as a neural network.](https://github.com/PennyLaneAI/pennylane) Author: Author-email: License: Apache License 2.0 Location: C:\Users\antot\anaconda3\envs\QML\Lib\site-packages Requires: appdirs, autograd, autoray, cachetools, networkx, numpy, packaging, pennylane-lightning, requests, rustworkx, scipy, semantic-version, toml, typing-extensions Required-by: PennyLane-qiskit, PennyLane\_Lightning Platform info: Windows-10-10.0.22631-SP0 Python version: 3.11.7 Numpy version: 1.24.4 Scipy version: 1.11.4 Installed devices: - default.clifford (PennyLane-0.37.0) - default.gaussian (PennyLane-0.37.0) - default.mixed (PennyLane-0.37.0) - default.qubit (PennyLane-0.37.0) - default.qubit.autograd (PennyLane-0.37.0) - default.qubit.jax (PennyLane-0.37.0) - default.qubit.legacy (PennyLane-0.37.0) - default.qubit.tf (PennyLane-0.37.0) - default.qubit.torch (PennyLane-0.37.0) - default.qutrit (PennyLane-0.37.0) - default.qutrit.mixed (PennyLane-0.37.0) - default.tensor (PennyLane-0.37.0) - null.qubit (PennyLane-0.37.0) - lightning.qubit (PennyLane\_Lightning-0.37.0) - qiskit.aer (PennyLane-qiskit-0.37.0) - qiskit.basicaer (PennyLane-qiskit-0.37.0) - qiskit.basicsim (PennyLane-qiskit-0.37.0) - qiskit.ibmq (PennyLane-qiskit-0.37.0) - qiskit.ibmq.circuit\_runner (PennyLane-qiskit-0.37.0) - qiskit.ibmq.sampler (PennyLane-qiskit-0.37.0) - qiskit.remote (PennyLane-qiskit-0.37.0) ---
**Author:** ![CatalinaAlbornoz](https://yyz2.discourse-cdn.com/flex012/user_avatar/discuss.pennylane.ai/catalinaalbornoz/32/1196_2.png) [@CatalinaAlbornoz](https://discuss.pennylane.ai/u/CatalinaAlbornoz)\ **Post date:** [September 19, 2024, 4:20am UTC](https://discuss.pennylane.ai/t/problem-quantum-datasets/5212/2 "2024-09-19T04:20:51Z")
Hi @antoniotudisco , welcome to the Forum! I can replicate this with PennyLane v0.38.1. I think this might be a bug. Let me check with the team to see if there’s a workaround or solution. Thanks for flagging this! ---
**Author:** ![antoniotudisco](https://yyz2.discourse-cdn.com/flex012/user_avatar/discuss.pennylane.ai/antoniotudisco/32/2838_2.png) [@antoniotudisco](https://discuss.pennylane.ai/u/antoniotudisco)\ **Post date:** [September 19, 2024, 9:12am UTC](https://discuss.pennylane.ai/t/problem-quantum-datasets/5212/3 "2024-09-19T09:12:20Z")
Thank you for the answer. However, I tried to create a new environment with pennylane version v0.38 and I have the same problem. ```auto >>> qml.about() Name: PennyLane Version: 0.38.0 Summary: PennyLane is a cross-platform Python library for quantum computing, quantum machine learning, and quantum chemistry. Train a quantum computer the same way as a neural network. Home-page: https://github.com/PennyLaneAI/pennylane Author: Author-email: License: Apache License 2.0 Location: C:\Users\antot\anaconda3\envs\provaQML\Lib\site-packages Requires: appdirs, autograd, autoray, cachetools, networkx, numpy, packaging, pennylane-lightning, requests, rustworkx, scipy, toml, typing-extensions Required-by: PennyLane_Lightning Platform info: Windows-11-10.0.22631-SP0 Python version: 3.12.5 Numpy version: 1.26.4 Scipy version: 1.14.1 Installed devices: - default.clifford (PennyLane-0.38.0) - default.gaussian (PennyLane-0.38.0) - default.mixed (PennyLane-0.38.0) - default.qubit (PennyLane-0.38.0) - default.qubit.autograd (PennyLane-0.38.0) - default.qubit.jax (PennyLane-0.38.0) - default.qubit.legacy (PennyLane-0.38.0) - default.qubit.tf (PennyLane-0.38.0) - default.qubit.torch (PennyLane-0.38.0) - default.qutrit (PennyLane-0.38.0) - default.qutrit.mixed (PennyLane-0.38.0) - default.tensor (PennyLane-0.38.0) - null.qubit (PennyLane-0.38.0) - lightning.qubit (PennyLane_Lightning-0.38.0) ``` I tried: ```auto >>> [ds] = qml.data.load("other", name='hidden-manifold') ``` And the error is: ```auto Traceback (most recent call last): File "C:\Users\antot\anaconda3\envs\provaQML\Lib\site-packages\requests\models.py", line 974, in json return complexjson.loads(self.text, **kwargs) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Users\antot\anaconda3\envs\provaQML\Lib\json\ __init__.py", line 346, in loads return _default_decoder.decode(s) ^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Users\antot\anaconda3\envs\provaQML\Lib\json\decoder.py", line 337, in decode obj, end = self.raw_decode(s, idx=_w(s, 0).end()) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Users\antot\anaconda3\envs\provaQML\Lib\json\decoder.py", line 353, in raw_decode obj, end = self.scan_once(s, idx) ^^^^^^^^^^^^^^^^^^^^^^ json.decoder.JSONDecodeError: Expecting property name enclosed in double quotes: line 7 column 7 (char 90) During handling of the above exception, another exception occurred: Traceback (most recent call last): File "", line 1, in File "C:\Users\antot\anaconda3\envs\provaQML\Lib\site-packages\pennylane\data\data_manager\ __init__.py", line 323, in load foldermap = _get_foldermap() ^^^^^^^^^^^^^^^^ File "C:\Users\antot\anaconda3\envs\provaQML\Lib\site-packages\pennylane\data\data_manager\ __init__.py", line 46, in _get_foldermap return FolderMapView(response.json()) ^^^^^^^^^^^^^^^ File "C:\Users\antot\anaconda3\envs\provaQML\Lib\site-packages\requests\models.py", line 978, in json raise RequestsJSONDecodeError(e.msg, e.doc, e.pos) requests.exceptions.JSONDecodeError: Expecting property name enclosed in double quotes: line 7 column 7 (char 90) >>> [ds] = qml.data.load("other", name='hidden-manifold') Traceback (most recent call last): File "C:\Users\antot\anaconda3\envs\provaQML\Lib\site-packages\requests\models.py", line 974, in json return complexjson.loads(self.text, **kwargs) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Users\antot\anaconda3\envs\provaQML\Lib\json\ __init__.py", line 346, in loads return _default_decoder.decode(s) ^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Users\antot\anaconda3\envs\provaQML\Lib\json\decoder.py", line 337, in decode obj, end = self.raw_decode(s, idx=_w(s, 0).end()) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "C:\Users\antot\anaconda3\envs\provaQML\Lib\json\decoder.py", line 353, in raw_decode obj, end = self.scan_once(s, idx) ^^^^^^^^^^^^^^^^^^^^^^ json.decoder.JSONDecodeError: Expecting property name enclosed in double quotes: line 7 column 7 (char 90) During handling of the above exception, another exception occurred: Traceback (most recent call last): File "", line 1, in File "C:\Users\antot\anaconda3\envs\provaQML\Lib\site-packages\pennylane\data\data_manager\ __init__.py", line 323, in load foldermap = _get_foldermap() ^^^^^^^^^^^^^^^^ File "C:\Users\antot\anaconda3\envs\provaQML\Lib\site-packages\pennylane\data\data_manager\ __init__.py", line 46, in _get_foldermap return FolderMapView(response.json()) ^^^^^^^^^^^^^^^ File "C:\Users\antot\anaconda3\envs\provaQML\Lib\site-packages\requests\models.py", line 978, in json raise RequestsJSONDecodeError(e.msg, e.doc, e.pos) requests.exceptions.JSONDecodeError: Expecting property name enclosed in double quotes: line 7 column 7 (char 90) ``` ---
**Author:** ![antoniotudisco](https://yyz2.discourse-cdn.com/flex012/user_avatar/discuss.pennylane.ai/antoniotudisco/32/2838_2.png) [@antoniotudisco](https://discuss.pennylane.ai/u/antoniotudisco)\ **Post date:** [September 19, 2024, 1:17pm UTC](https://discuss.pennylane.ai/t/problem-quantum-datasets/5212/4 "2024-09-19T13:17:18Z")
I apologize, it was necessary to delete the datasets folder and pycache as it was conflicting ---
**Author:** ![CatalinaAlbornoz](https://yyz2.discourse-cdn.com/flex012/user_avatar/discuss.pennylane.ai/catalinaalbornoz/32/1196_2.png) [@CatalinaAlbornoz](https://discuss.pennylane.ai/u/CatalinaAlbornoz)\ **Post date:** [September 20, 2024, 8:04pm UTC](https://discuss.pennylane.ai/t/problem-quantum-datasets/5212/5 "2024-09-20T20:04:39Z")
I’m glad to hear that the issue is solved for you! Thanks for confirming 🙌