From dc60a224af02376ecaf1ee2cbbdfc34a037ef6ce Mon Sep 17 00:00:00 2001
From: jbrockmendel <jbrockmendel@gmail.com>
Date: Mon, 23 Mar 2020 18:06:51 -0700
Subject: [PATCH] DEPR: Index.is_mixed

---
 doc/source/whatsnew/v1.1.0.rst    | 1 +
 pandas/core/indexes/base.py       | 8 +++++++-
 pandas/tests/indexes/test_base.py | 6 ++++++
 3 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/doc/source/whatsnew/v1.1.0.rst b/doc/source/whatsnew/v1.1.0.rst
index 692df075f25cb..bd265ac1e5cf6 100644
--- a/doc/source/whatsnew/v1.1.0.rst
+++ b/doc/source/whatsnew/v1.1.0.rst
@@ -209,6 +209,7 @@ Deprecations
 - Setting values with ``.loc`` using a positional slice is deprecated and will raise in a future version.  Use ``.loc`` with labels or ``.iloc`` with positions instead (:issue:`31840`)
 - :meth:`DataFrame.to_dict` has deprecated accepting short names for ``orient`` in future versions (:issue:`32515`)
 - :meth:`Categorical.to_dense` is deprecated and will be removed in a future version, use ``np.asarray(cat)`` instead (:issue:`32639`)
+- :meth:`Index.is_mixed` is deprecated and will be removed in a future version, check ``index.inferred_type`` directly instead (:issue:`32922`)
 
 .. ---------------------------------------------------------------------------
 
diff --git a/pandas/core/indexes/base.py b/pandas/core/indexes/base.py
index 83064fe22eaff..3d20d904e6e70 100644
--- a/pandas/core/indexes/base.py
+++ b/pandas/core/indexes/base.py
@@ -1955,6 +1955,12 @@ def is_mixed(self) -> bool:
         >>> idx.is_mixed()
         False
         """
+        warnings.warn(
+            "Index.is_mixed is deprecated and will be removed in a future version. "
+            "Check index.inferred_type directly instead.",
+            FutureWarning,
+            stacklevel=2,
+        )
         return self.inferred_type in ["mixed"]
 
     def holds_integer(self) -> bool:
@@ -3131,7 +3137,7 @@ def is_int(v):
         # convert the slice to an indexer here
 
         # if we are mixed and have integers
-        if is_positional and self.is_mixed():
+        if is_positional:
             try:
                 # Validate start & stop
                 if start is not None:
diff --git a/pandas/tests/indexes/test_base.py b/pandas/tests/indexes/test_base.py
index 5bdbc18769ce5..940e33a3f561f 100644
--- a/pandas/tests/indexes/test_base.py
+++ b/pandas/tests/indexes/test_base.py
@@ -1161,6 +1161,12 @@ def test_intersection_difference(self, indices, sort):
         diff = indices.difference(indices, sort=sort)
         tm.assert_index_equal(inter, diff)
 
+    def test_is_mixed_deprecated(self):
+        # GH#32922
+        index = self.create_index()
+        with tm.assert_produces_warning(FutureWarning):
+            index.is_mixed()
+
     @pytest.mark.parametrize(
         "index, expected",
         [