CLN: OrderedDict -> Dict (#30471)

Author: alimcmaster1

pandas/core/base.py

@@ -2,7 +2,6 @@
 Base and utility classes for pandas objects.
 """
 import builtins
-from collections import OrderedDict
 import textwrap
 from typing import Dict, FrozenSet, List, Optional
 
@@ -141,39 +140,35 @@ class SelectionMixin:
     _internal_names = ["_cache", "__setstate__"]
     _internal_names_set = set(_internal_names)
 
-    _builtin_table = OrderedDict(
-        ((builtins.sum, np.sum), (builtins.max, np.max), (builtins.min, np.min))
-    )
-
-    _cython_table = OrderedDict(
-        (
-            (builtins.sum, "sum"),
-            (builtins.max, "max"),
-            (builtins.min, "min"),
-            (np.all, "all"),
-            (np.any, "any"),
-            (np.sum, "sum"),
-            (np.nansum, "sum"),
-            (np.mean, "mean"),
-            (np.nanmean, "mean"),
-            (np.prod, "prod"),
-            (np.nanprod, "prod"),
-            (np.std, "std"),
-            (np.nanstd, "std"),
-            (np.var, "var"),
-            (np.nanvar, "var"),
-            (np.median, "median"),
-            (np.nanmedian, "median"),
-            (np.max, "max"),
-            (np.nanmax, "max"),
-            (np.min, "min"),
-            (np.nanmin, "min"),
-            (np.cumprod, "cumprod"),
-            (np.nancumprod, "cumprod"),
-            (np.cumsum, "cumsum"),
-            (np.nancumsum, "cumsum"),
-        )
-    )
+    _builtin_table = {builtins.sum: np.sum, builtins.max: np.max, builtins.min: np.min}
+
+    _cython_table = {
+        builtins.sum: "sum",
+        builtins.max: "max",
+        builtins.min: "min",
+        np.all: "all",
+        np.any: "any",
+        np.sum: "sum",
+        np.nansum: "sum",
+        np.mean: "mean",
+        np.nanmean: "mean",
+        np.prod: "prod",
+        np.nanprod: "prod",
+        np.std: "std",
+        np.nanstd: "std",
+        np.var: "var",
+        np.nanvar: "var",
+        np.median: "median",
+        np.nanmedian: "median",
+        np.max: "max",
+        np.nanmax: "max",
+        np.min: "min",
+        np.nanmin: "min",
+        np.cumprod: "cumprod",
+        np.nancumprod: "cumprod",
+        np.cumsum: "cumsum",
+        np.nancumsum: "cumsum",
+    }
 
     @property
     def _selection_name(self):
@@ -328,7 +323,7 @@ def _aggregate(self, arg, *args, **kwargs):
             # eg. {'A' : ['mean']}, normalize all to
             # be list-likes
             if any(is_aggregator(x) for x in arg.values()):
-                new_arg = OrderedDict()
+                new_arg = {}
                 for k, v in arg.items():
                     if not isinstance(v, (tuple, list, dict)):
                         new_arg[k] = [v]
@@ -386,16 +381,16 @@ def _agg_2dim(name, how):
             def _agg(arg, func):
                 """
                 run the aggregations over the arg with func
-                return an OrderedDict
+                return a dict
                 """
-                result = OrderedDict()
+                result = {}
                 for fname, agg_how in arg.items():
                     result[fname] = func(fname, agg_how)
                 return result
 
             # set the final keys
             keys = list(arg.keys())
-            result = OrderedDict()
+            result = {}
 
             if self._selection is not None:
 

pandas/io/json/_json.py

@@ -1,4 +1,4 @@
-from collections import OrderedDict, abc
+from collections import abc
 import functools
 from io import StringIO
 from itertools import islice
@@ -331,7 +331,7 @@ def _write(
         default_handler,
         indent,
     ):
-        table_obj = OrderedDict((("schema", self.schema), ("data", obj)))
+        table_obj = {"schema": self.schema, "data": obj}
         serialized = super()._write(
             table_obj,
             orient,

pandas/tests/series/test_apply.py

@@ -1,4 +1,4 @@
-from collections import Counter, OrderedDict, defaultdict
+from collections import Counter, defaultdict
 from itertools import chain
 
 import numpy as np
@@ -297,18 +297,16 @@ def test_replicate_describe(self, string_series):
         # this also tests a result set that is all scalars
         expected = string_series.describe()
         result = string_series.apply(
-            OrderedDict(
-                [
-                    ("count", "count"),
-                    ("mean", "mean"),
-                    ("std", "std"),
-                    ("min", "min"),
-                    ("25%", lambda x: x.quantile(0.25)),
-                    ("50%", "median"),
-                    ("75%", lambda x: x.quantile(0.75)),
-                    ("max", "max"),
-                ]
-            )
+            {
+                "count": "count",
+                "mean": "mean",
+                "std": "std",
+                "min": "min",
+                "25%": lambda x: x.quantile(0.25),
+                "50%": "median",
+                "75%": lambda x: x.quantile(0.75),
+                "max": "max",
+            }
         )
         tm.assert_series_equal(result, expected)
 
@@ -333,7 +331,7 @@ def test_non_callable_aggregates(self):
 
         # test when mixed w/ callable reducers
         result = s.agg(["size", "count", "mean"])
-        expected = Series(OrderedDict([("size", 3.0), ("count", 2.0), ("mean", 1.5)]))
+        expected = Series({"size": 3.0, "count": 2.0, "mean": 1.5})
         tm.assert_series_equal(result[expected.index], expected)
 
     @pytest.mark.parametrize(