JSON Decode Error

[afhalperin]

Hello, I am new to Github and Python, so I apologize if this is a dumb question. (Feel free to tell me if it is).

I tried to run (from your sample code) after installing OSMPythonTools in a cloned ArcGIS Pro environment. I got the following error (and ignored it):

Then I ran the code.

from OSMPythonTools.nominatim import Nominatim
nominatim = Nominatim()
heidelberg = nominatim.query('Heidelberg')

I subsequently got the following JSON DeCode Error. Is the problem the error I got with the installation?

JSONDecodeError Traceback (most recent call last)
~\AppData\Local\ESRI\conda\envs\arcgispro-py3-clone\lib\site-packages\arcgis\features\geo_accessor.py in from_layer(layer)
2288 from arcgis.features.geo._io.serviceops import from_layer
-> 2289 return from_layer(layer=layer)
2290 except ImportError:

~\AppData\Local\ESRI\conda\envs\arcgispro-py3-clone\lib\site-packages\arcgis\features\geo_io\serviceops.py in from_layer(layer, query)
104 raise ValueError("Invalid inputs: must be FeatureLayer or Table")
--> 105 sdf = layer.query(where=query, as_df=True)
106 sdf.spatial._meta.source = layer

~\AppData\Local\ESRI\conda\envs\arcgispro-py3-clone\lib\site-packages\arcgis\features\layer.py in query(self, where, out_fields, time_filter, geometry_filter, return_geometry, return_count_only, return_ids_only, return_distinct_values, return_extent_only, group_by_fields_for_statistics, statistic_filter, result_offset, result_record_count, object_ids, distance, units, max_allowable_offset, out_sr, geometry_precision, gdb_version, order_by_fields, out_statistics, return_z, return_m, multipatch_option, quantization_parameters, return_centroid, return_all_records, result_type, historic_moment, sql_format, return_true_curves, return_exceeded_limit_features, as_df, datum_transformation, **kwargs)
1047 params['returnCountOnly'] = True
-> 1048 record_count = self._query(url, params, raw=as_raw)
1049 if 'maxRecordCount' in self.properties:

~\AppData\Local\ESRI\conda\envs\arcgispro-py3-clone\lib\site-packages\arcgis\features\layer.py in _query(self, url, params, raw)
2047 else:
-> 2048 raise queryException
2049

~\AppData\Local\ESRI\conda\envs\arcgispro-py3-clone\lib\site-packages\arcgis\features\layer.py in _query(self, url, params, raw)
2017 result = self._con.post(path=url,
-> 2018 postdata=params, token=self._token)
2019 except Exception as queryException:

~\AppData\Local\ESRI\conda\envs\arcgispro-py3-clone\lib\site-packages\arcgis\gis_init_.py in _token(self)
10777 else:

10778 self._hydrate()
10779 return self._lazy_token

~\AppData\Local\ESRI\conda\envs\arcgispro-py3-clone\lib\site-packages\arcgis\gis_init_.py in _hydrate(self)
10756 self._lazy_token = None

10757 self._refresh()
10758

~\AppData\Local\ESRI\conda\envs\arcgispro-py3-clone\lib\site-packages\arcgis\gis_init_.py in _refresh(self)
10699 else:

10700 raise e
10701

~\AppData\Local\ESRI\conda\envs\arcgispro-py3-clone\lib\site-packages\arcgis\gis_init_.py in _refresh(self)
10692 try:

10693 dictdata = self._con.post(self.url, params, token=self._lazy_token)
10694 except Exception as e:

~\AppData\Local\ESRI\conda\envs\arcgispro-py3-clone\lib\site-packages\arcgis\gis_impl_con_connection.py in post(self, path, params, files, **kwargs)
709 try_json=try_json,
--> 710 force_bytes=kwargs.pop('force_bytes', False))
711 #----------------------------------------------------------------------

~\AppData\Local\ESRI\conda\envs\arcgispro-py3-clone\lib\site-packages\arcgis\gis_impl_con_connection.py in _handle_response(self, resp, file_name, out_path, try_json, force_bytes)
496 else:
--> 497 data = resp.json()
498 #if 'error' in data:

~\AppData\Local\ESRI\conda\envs\arcgispro-py3-clone\lib\site-packages\requests\models.py in json(self, **kwargs)
897 pass
--> 898 return complexjson.loads(self.text, **kwargs)
899

~\AppData\Local\ESRI\conda\envs\arcgispro-py3-clone\lib\json_init_.py in loads(s, encoding, cls, object_hook, parse_float, parse_int, parse_constant, object_pairs_hook, **kw)
353 parse_constant is None and object_pairs_hook is None and not kw):
--> 354 return _default_decoder.decode(s)
355 if cls is None:

~\AppData\Local\ESRI\conda\envs\arcgispro-py3-clone\lib\json\decoder.py in decode(self, s, _w)
338 """
--> 339 obj, end = self.raw_decode(s, idx=_w(s, 0).end())
340 end = _w(s, end).end()

~\AppData\Local\ESRI\conda\envs\arcgispro-py3-clone\lib\json\decoder.py in raw_decode(self, s, idx)
356 except StopIteration as err:
--> 357 raise JSONDecodeError("Expecting value", s, err.value) from None
358 return obj, end

JSONDecodeError: Expecting value: line 1 column 1 (char 0)

During handling of the above exception, another exception occurred:

Exception Traceback (most recent call last)
in
18 # get_URL = input("Paste in the URL for the city boundary layer you want from Open Street Map:")
19 dc_fl = FeatureLayer('https://nominatim.openstreetmap.org/ui/details.html?osmtype=R&osmid=1839150&class=boundary')
---> 20 dc_df = GeoAccessor.from_layer(dc_fl)
21 display(dc_df.head())
22

~\AppData\Local\ESRI\conda\envs\arcgispro-py3-clone\lib\site-packages\arcgis\features\geo_accessor.py in from_layer(layer)
2291 raise ImportError("Could not load from_layer.")
2292 except json.JSONDecodeError as je:
-> 2293 raise Exception("Malformed response from server, could not load the dataset: %s" % str(je))
2294 except Exception as e:
2295 raise Exception("Could not load the dataset: %s" % str(e))

Exception: Malformed response from server, could not load the dataset: Expecting value: line 1 column 1 (char 0)

[afhalperin]

Yup, I didn't install this properly. Sorry for any trouble.