Do not sort keys during json serialization

CHANGELOG.md

@@ -2,6 +2,14 @@
 All notable changes to this project will be documented in this file.
 This project adheres to [Semantic Versioning](http://semver.org/).
 
+## [next] - ???
+
+### Fixed
+  - Fixed error when serializing dict with mix of string and non-string keys [#3380](https://github.com/plotly/plotly.py/issues/3380)
+
+### Updated
+  - The JSON serialization engines no longer sort their keys [#3380](https://github.com/plotly/plotly.py/issues/3380)
+
 ## [5.3.1] - 2021-08-31
 
 ### Updated

packages/python/plotly/plotly/io/_json.py

@@ -112,7 +112,7 @@ def to_json_plotly(plotly_object, pretty=False, engine=None):
     # Dump to a JSON string and return
     # --------------------------------
     if engine == "json":
-        opts = {"sort_keys": True}
+        opts = {}
         if pretty:
             opts["indent"] = 2
         else:
@@ -124,7 +124,7 @@ def to_json_plotly(plotly_object, pretty=False, engine=None):
         return json.dumps(plotly_object, cls=PlotlyJSONEncoder, **opts)
     elif engine == "orjson":
         JsonConfig.validate_orjson()
-        opts = orjson.OPT_SORT_KEYS | orjson.OPT_SERIALIZE_NUMPY
+        opts = orjson.OPT_NON_STR_KEYS | orjson.OPT_SERIALIZE_NUMPY
 
         if pretty:
             opts |= orjson.OPT_INDENT_2
@@ -462,7 +462,7 @@ def clean_to_json_compatible(obj, **kwargs):
         return obj
 
     if isinstance(obj, dict):
-        return {str(k): clean_to_json_compatible(v, **kwargs) for k, v in obj.items()}
+        return {k: clean_to_json_compatible(v, **kwargs) for k, v in obj.items()}
     elif isinstance(obj, (list, tuple)):
         if obj:
             # Must process list recursively even though it may be slow

packages/python/plotly/plotly/tests/test_core/test_graph_objs/test_template.py

@@ -356,7 +356,7 @@ def test_move_nested_trace_properties(self):
             },
         )
 
-        self.assertEqual(pio.to_json(templated_fig), pio.to_json(expected_fig))
+        self.assertEqual(templated_fig.to_dict(), expected_fig.to_dict())
 
     def test_move_nested_trace_properties_existing_traces(self):
         fig = go.Figure(

packages/python/plotly/plotly/tests/test_io/test_deepcopy_pickle.py

@@ -38,7 +38,7 @@ def test_deepcopy_figure(fig1):
     fig_copied = copy.deepcopy(fig1)
 
     # Contents should be equal
-    assert pio.to_json(fig_copied) == pio.to_json(fig1)
+    assert fig_copied.to_dict() == fig1.to_dict()
 
     # Identities should be distinct
     assert fig_copied is not fig1
@@ -50,7 +50,7 @@ def test_deepcopy_figure_subplots(fig_subplots):
     fig_copied = copy.deepcopy(fig_subplots)
 
     # Contents should be equal
-    assert pio.to_json(fig_copied) == pio.to_json(fig_subplots)
+    assert fig_copied.to_dict() == fig_subplots.to_dict()
 
     # Subplot metadata should be equal
     assert fig_subplots._grid_ref == fig_copied._grid_ref
@@ -66,7 +66,7 @@ def test_deepcopy_figure_subplots(fig_subplots):
     fig_copied.add_bar(y=[0, 0, 1], row=1, col=2)
 
     # And contents should be still equal
-    assert pio.to_json(fig_copied) == pio.to_json(fig_subplots)
+    assert fig_copied.to_dict() == fig_subplots.to_dict()
 
 
 def test_deepcopy_layout(fig1):
@@ -91,21 +91,21 @@ def test_pickle_figure_round_trip(fig1):
     fig_copied = pickle.loads(pickle.dumps(fig1))
 
     # Contents should be equal
-    assert pio.to_json(fig_copied) == pio.to_json(fig1)
+    assert fig_copied.to_dict() == fig1.to_dict()
 
 
 def test_pickle_figure_subplots_round_trip(fig_subplots):
     fig_copied = pickle.loads(pickle.dumps(fig_subplots))
 
     # Contents should be equal
-    assert pio.to_json(fig_copied) == pio.to_json(fig_subplots)
+    assert fig_copied.to_dict() == fig_subplots.to_dict()
 
     # Should be possible to add new trace to subplot location
     fig_subplots.add_bar(y=[0, 0, 1], row=1, col=2)
     fig_copied.add_bar(y=[0, 0, 1], row=1, col=2)
 
     # And contents should be still equal
-    assert pio.to_json(fig_copied) == pio.to_json(fig_subplots)
+    assert fig_copied.to_dict() == fig_subplots.to_dict()
 
 
 def test_pickle_layout(fig1):

packages/python/plotly/plotly/tests/test_io/test_to_from_json.py

@@ -29,9 +29,8 @@ def fig1(request):
 opts = {
     "separators": (",", ":"),
     "cls": plotly.utils.PlotlyJSONEncoder,
-    "sort_keys": True,
 }
-pretty_opts = {"indent": 2, "cls": plotly.utils.PlotlyJSONEncoder, "sort_keys": True}
+pretty_opts = {"indent": 2, "cls": plotly.utils.PlotlyJSONEncoder}
 
 
 # to_json

packages/python/plotly/plotly/tests/test_io/test_to_from_plotly_json.py

@@ -135,7 +135,7 @@ def datetime_array(request, datetime_value):
 def test_graph_object_input(engine, pretty):
     scatter = go.Scatter(x=[1, 2, 3], y=np.array([4, 5, 6]))
     result = pio.to_json_plotly(scatter, engine=engine)
-    expected = """{"type":"scatter","x":[1,2,3],"y":[4,5,6]}"""
+    expected = """{"x":[1,2,3],"y":[4,5,6],"type":"scatter"}"""
     assert result == expected
     check_roundtrip(result, engine=engine, pretty=pretty)
 
@@ -215,3 +215,9 @@ def test_nonstring_key(engine, pretty):
     value = build_test_dict({0: 1})
     result = pio.to_json_plotly(value, engine=engine)
     check_roundtrip(result, engine=engine, pretty=pretty)
+
+
+def test_mixed_string_nonstring_key(engine, pretty):
+    value = build_test_dict({0: 1, "a": 2})
+    result = pio.to_json_plotly(value, engine=engine)
+    check_roundtrip(result, engine=engine, pretty=pretty)

packages/python/plotly/plotly/tests/test_optional/test_offline/test_offline.py

@@ -89,7 +89,6 @@ def test_default_mpl_plot_generates_expected_html(self):
             # just make sure a few of the parts are in here
             # like PlotlyOfflineTestCase(TestCase) in test_core
             self.assertTrue(data_json in html)  # data is in there
-            self.assertTrue(layout_json in html)  # layout is in there too
             self.assertTrue(PLOTLYJS in html)  # and the source code
             # and it's an <html> doc
             self.assertTrue(html.startswith("<html>") and html.endswith("</html>"))