From 4b9cc76b07871da9c7153fcfebe47826339810fe Mon Sep 17 00:00:00 2001
From: MomIsBestFriend <>
Date: Sat, 23 Nov 2019 21:44:44 +0200
Subject: [PATCH 1/4] Added annotation to __eq__

---
 pandas/_libs/tslibs/offsets.pyx                   | 2 +-
 pandas/core/arrays/sparse/dtype.py                | 2 +-
 pandas/core/dtypes/dtypes.py                      | 6 +++---
 pandas/core/indexes/frozen.py                     | 2 +-
 pandas/io/pytables.py                             | 2 +-
 pandas/io/stata.py                                | 2 +-
 pandas/tests/indexing/test_indexing.py            | 2 +-
 pandas/tests/scalar/timestamp/test_comparisons.py | 2 +-
 pandas/tests/series/test_ufunc.py                 | 2 +-
 pandas/tests/test_algos.py                        | 2 +-
 pandas/tseries/offsets.py                         | 2 +-
 11 files changed, 13 insertions(+), 13 deletions(-)

diff --git a/pandas/_libs/tslibs/offsets.pyx b/pandas/_libs/tslibs/offsets.pyx
index 68a0a4a403c81..327d1067dd17d 100644
--- a/pandas/_libs/tslibs/offsets.pyx
+++ b/pandas/_libs/tslibs/offsets.pyx
@@ -328,7 +328,7 @@ class _BaseOffset:
     def __setattr__(self, name, value):
         raise AttributeError("DateOffset objects are immutable.")
 
-    def __eq__(self, other):
+    def __eq__(self, other) -> bool:
         if isinstance(other, str):
             try:
                 # GH#23524 if to_offset fails, we are dealing with an
diff --git a/pandas/core/arrays/sparse/dtype.py b/pandas/core/arrays/sparse/dtype.py
index 4de958cc386b9..3b656705f5568 100644
--- a/pandas/core/arrays/sparse/dtype.py
+++ b/pandas/core/arrays/sparse/dtype.py
@@ -90,7 +90,7 @@ def __hash__(self):
         # __eq__, so we explicitly do it here.
         return super().__hash__()
 
-    def __eq__(self, other):
+    def __eq__(self, other) -> bool:
         # We have to override __eq__ to handle NA values in _metadata.
         # The base class does simple == checks, which fail for NA.
         if isinstance(other, str):
diff --git a/pandas/core/dtypes/dtypes.py b/pandas/core/dtypes/dtypes.py
index 523c8e8bd02d0..2c601b01dbae5 100644
--- a/pandas/core/dtypes/dtypes.py
+++ b/pandas/core/dtypes/dtypes.py
@@ -765,7 +765,7 @@ def __hash__(self) -> int:
         # TODO: update this.
         return hash(str(self))
 
-    def __eq__(self, other):
+    def __eq__(self, other) -> bool:
         if isinstance(other, str):
             return other == self.name
 
@@ -904,7 +904,7 @@ def __hash__(self) -> int:
         # make myself hashable
         return hash(str(self))
 
-    def __eq__(self, other):
+    def __eq__(self, other) -> bool:
         if isinstance(other, str):
             return other == self.name or other == self.name.title()
 
@@ -1077,7 +1077,7 @@ def __hash__(self) -> int:
         # make myself hashable
         return hash(str(self))
 
-    def __eq__(self, other):
+    def __eq__(self, other) -> bool:
         if isinstance(other, str):
             return other.lower() in (self.name.lower(), str(self).lower())
         elif not isinstance(other, IntervalDtype):
diff --git a/pandas/core/indexes/frozen.py b/pandas/core/indexes/frozen.py
index 2c9521d23f71a..13c386187a9e5 100644
--- a/pandas/core/indexes/frozen.py
+++ b/pandas/core/indexes/frozen.py
@@ -77,7 +77,7 @@ def __radd__(self, other):
             other = list(other)
         return self.__class__(other + list(self))
 
-    def __eq__(self, other):
+    def __eq__(self, other) -> bool:
         if isinstance(other, (tuple, FrozenList)):
             other = list(other)
         return super().__eq__(other)
diff --git a/pandas/io/pytables.py b/pandas/io/pytables.py
index 8afbd293a095b..99cfb22b9921f 100644
--- a/pandas/io/pytables.py
+++ b/pandas/io/pytables.py
@@ -2109,7 +2109,7 @@ def __repr__(self) -> str:
             )
         )
 
-    def __eq__(self, other):
+    def __eq__(self, other) -> bool:
         """ compare 2 col items """
         return all(
             getattr(self, a, None) == getattr(other, a, None)
diff --git a/pandas/io/stata.py b/pandas/io/stata.py
index 567eeb7f5cdc8..bd5e215730397 100644
--- a/pandas/io/stata.py
+++ b/pandas/io/stata.py
@@ -859,7 +859,7 @@ def __repr__(self) -> str:
         # not perfect :-/
         return "{cls}({obj})".format(cls=self.__class__, obj=self)
 
-    def __eq__(self, other):
+    def __eq__(self, other) -> bool:
         return (
             isinstance(other, self.__class__)
             and self.string == other.string
diff --git a/pandas/tests/indexing/test_indexing.py b/pandas/tests/indexing/test_indexing.py
index fc5753ec2955c..8e52d2cca7070 100644
--- a/pandas/tests/indexing/test_indexing.py
+++ b/pandas/tests/indexing/test_indexing.py
@@ -595,7 +595,7 @@ def __str__(self) -> str:
 
             __repr__ = __str__
 
-            def __eq__(self, other):
+            def __eq__(self, other) -> bool:
                 return self.value == other.value
 
             def view(self):
diff --git a/pandas/tests/scalar/timestamp/test_comparisons.py b/pandas/tests/scalar/timestamp/test_comparisons.py
index 4ff0f84327854..da0818c5dc596 100644
--- a/pandas/tests/scalar/timestamp/test_comparisons.py
+++ b/pandas/tests/scalar/timestamp/test_comparisons.py
@@ -179,7 +179,7 @@ def __gt__(self, o):
         def __ge__(self, o):
             return True
 
-        def __eq__(self, o):
+        def __eq__(self, o) -> bool:
             return isinstance(o, Inf)
 
     inf = Inf()
diff --git a/pandas/tests/series/test_ufunc.py b/pandas/tests/series/test_ufunc.py
index c8a127f89bf91..977e7ded1f1a7 100644
--- a/pandas/tests/series/test_ufunc.py
+++ b/pandas/tests/series/test_ufunc.py
@@ -282,7 +282,7 @@ def __add__(self, other):
             other = getattr(other, "value", other)
             return type(self)(self.value + other)
 
-        def __eq__(self, other):
+        def __eq__(self, other) -> bool:
             return type(other) is Thing and self.value == other.value
 
         def __repr__(self) -> str:
diff --git a/pandas/tests/test_algos.py b/pandas/tests/test_algos.py
index 9e89a1b6f0467..02b50d84c6eca 100644
--- a/pandas/tests/test_algos.py
+++ b/pandas/tests/test_algos.py
@@ -767,7 +767,7 @@ def test_same_object_is_in(self):
         # with similar behavior, then we at least should
         # fall back to usual python's behavior: "a in [a] == True"
         class LikeNan:
-            def __eq__(self, other):
+            def __eq__(self, other) -> bool:
                 return False
 
             def __hash__(self):
diff --git a/pandas/tseries/offsets.py b/pandas/tseries/offsets.py
index e516d30d5490f..0620f2b9aae49 100644
--- a/pandas/tseries/offsets.py
+++ b/pandas/tseries/offsets.py
@@ -2577,7 +2577,7 @@ def __add__(self, other):
                 "will overflow".format(self=self, other=other)
             )
 
-    def __eq__(self, other):
+    def __eq__(self, other) -> bool:
         if isinstance(other, str):
             from pandas.tseries.frequencies import to_offset
 

From 489f757d89961dd48072d186ebbf9c845cb784dc Mon Sep 17 00:00:00 2001
From: MomIsBestFriend <>
Date: Tue, 26 Nov 2019 01:13:50 +0200
Subject: [PATCH 2/4] Added 'object' annotation to 'other'

---
 pandas/_libs/tslibs/offsets.pyx                   | 2 +-
 pandas/core/arrays/sparse/dtype.py                | 2 +-
 pandas/core/dtypes/base.py                        | 2 +-
 pandas/core/dtypes/dtypes.py                      | 8 ++++----
 pandas/core/indexes/frozen.py                     | 2 +-
 pandas/io/pytables.py                             | 4 ++--
 pandas/io/stata.py                                | 2 +-
 pandas/tests/groupby/test_function.py             | 2 +-
 pandas/tests/indexing/test_indexing.py            | 2 +-
 pandas/tests/scalar/timedelta/test_timedelta.py   | 2 +-
 pandas/tests/scalar/timestamp/test_comparisons.py | 2 +-
 pandas/tests/series/test_ufunc.py                 | 2 +-
 pandas/tests/test_algos.py                        | 2 +-
 pandas/tseries/offsets.py                         | 2 +-
 14 files changed, 18 insertions(+), 18 deletions(-)

diff --git a/pandas/_libs/tslibs/offsets.pyx b/pandas/_libs/tslibs/offsets.pyx
index 327d1067dd17d..9ea0f94c86e41 100644
--- a/pandas/_libs/tslibs/offsets.pyx
+++ b/pandas/_libs/tslibs/offsets.pyx
@@ -328,7 +328,7 @@ class _BaseOffset:
     def __setattr__(self, name, value):
         raise AttributeError("DateOffset objects are immutable.")
 
-    def __eq__(self, other) -> bool:
+    def __eq__(self, other: object) -> bool:
         if isinstance(other, str):
             try:
                 # GH#23524 if to_offset fails, we are dealing with an
diff --git a/pandas/core/arrays/sparse/dtype.py b/pandas/core/arrays/sparse/dtype.py
index 3b656705f5568..994f210d0f017 100644
--- a/pandas/core/arrays/sparse/dtype.py
+++ b/pandas/core/arrays/sparse/dtype.py
@@ -90,7 +90,7 @@ def __hash__(self):
         # __eq__, so we explicitly do it here.
         return super().__hash__()
 
-    def __eq__(self, other) -> bool:
+    def __eq__(self, other: object) -> bool:
         # We have to override __eq__ to handle NA values in _metadata.
         # The base class does simple == checks, which fail for NA.
         if isinstance(other, str):
diff --git a/pandas/core/dtypes/base.py b/pandas/core/dtypes/base.py
index 8acdf32c8768e..157f990f08243 100644
--- a/pandas/core/dtypes/base.py
+++ b/pandas/core/dtypes/base.py
@@ -86,7 +86,7 @@ def __from_arrow__(
     def __str__(self) -> str:
         return self.name
 
-    def __eq__(self, other) -> bool:
+    def __eq__(self, other: object) -> bool:
         """
         Check whether 'other' is equal to self.
 
diff --git a/pandas/core/dtypes/dtypes.py b/pandas/core/dtypes/dtypes.py
index 2c601b01dbae5..d758ce7267d06 100644
--- a/pandas/core/dtypes/dtypes.py
+++ b/pandas/core/dtypes/dtypes.py
@@ -370,7 +370,7 @@ def __hash__(self) -> int:
         # We *do* want to include the real self.ordered here
         return int(self._hash_categories(self.categories, self._ordered))
 
-    def __eq__(self, other: Any) -> bool:
+    def __eq__(self, other: object) -> bool:
         """
         Rules for CDT equality:
         1) Any CDT is equal to the string 'category'
@@ -765,7 +765,7 @@ def __hash__(self) -> int:
         # TODO: update this.
         return hash(str(self))
 
-    def __eq__(self, other) -> bool:
+    def __eq__(self, other: object) -> bool:
         if isinstance(other, str):
             return other == self.name
 
@@ -904,7 +904,7 @@ def __hash__(self) -> int:
         # make myself hashable
         return hash(str(self))
 
-    def __eq__(self, other) -> bool:
+    def __eq__(self, other: object) -> bool:
         if isinstance(other, str):
             return other == self.name or other == self.name.title()
 
@@ -1077,7 +1077,7 @@ def __hash__(self) -> int:
         # make myself hashable
         return hash(str(self))
 
-    def __eq__(self, other) -> bool:
+    def __eq__(self, other: object) -> bool:
         if isinstance(other, str):
             return other.lower() in (self.name.lower(), str(self).lower())
         elif not isinstance(other, IntervalDtype):
diff --git a/pandas/core/indexes/frozen.py b/pandas/core/indexes/frozen.py
index 13c386187a9e5..e4e68f7fdfb72 100644
--- a/pandas/core/indexes/frozen.py
+++ b/pandas/core/indexes/frozen.py
@@ -77,7 +77,7 @@ def __radd__(self, other):
             other = list(other)
         return self.__class__(other + list(self))
 
-    def __eq__(self, other) -> bool:
+    def __eq__(self, other: object) -> bool:
         if isinstance(other, (tuple, FrozenList)):
             other = list(other)
         return super().__eq__(other)
diff --git a/pandas/io/pytables.py b/pandas/io/pytables.py
index 99cfb22b9921f..e2a9ca299d799 100644
--- a/pandas/io/pytables.py
+++ b/pandas/io/pytables.py
@@ -1773,7 +1773,7 @@ def __repr__(self) -> str:
             )
         )
 
-    def __eq__(self, other) -> bool:
+    def __eq__(self, other: object) -> bool:
         """ compare 2 col items """
         return all(
             getattr(self, a, None) == getattr(other, a, None)
@@ -2109,7 +2109,7 @@ def __repr__(self) -> str:
             )
         )
 
-    def __eq__(self, other) -> bool:
+    def __eq__(self, other: object) -> bool:
         """ compare 2 col items """
         return all(
             getattr(self, a, None) == getattr(other, a, None)
diff --git a/pandas/io/stata.py b/pandas/io/stata.py
index bd5e215730397..42c4f76c749d4 100644
--- a/pandas/io/stata.py
+++ b/pandas/io/stata.py
@@ -859,7 +859,7 @@ def __repr__(self) -> str:
         # not perfect :-/
         return "{cls}({obj})".format(cls=self.__class__, obj=self)
 
-    def __eq__(self, other) -> bool:
+    def __eq__(self, other: object) -> bool:
         return (
             isinstance(other, self.__class__)
             and self.string == other.string
diff --git a/pandas/tests/groupby/test_function.py b/pandas/tests/groupby/test_function.py
index c41f762e9128d..550954564ac0c 100644
--- a/pandas/tests/groupby/test_function.py
+++ b/pandas/tests/groupby/test_function.py
@@ -1230,7 +1230,7 @@ def __init__(self, msg="I will raise inside Cython"):
             super().__init__()
             self.msg = msg
 
-        def __eq__(self, other):
+        def __eq__(self, other: object):
             # gets called in Cython to check that raising calls the method
             raise RaisingObjectException(self.msg)
 
diff --git a/pandas/tests/indexing/test_indexing.py b/pandas/tests/indexing/test_indexing.py
index 8e52d2cca7070..25985c0004ef9 100644
--- a/pandas/tests/indexing/test_indexing.py
+++ b/pandas/tests/indexing/test_indexing.py
@@ -595,7 +595,7 @@ def __str__(self) -> str:
 
             __repr__ = __str__
 
-            def __eq__(self, other) -> bool:
+            def __eq__(self, other: object) -> bool:
                 return self.value == other.value
 
             def view(self):
diff --git a/pandas/tests/scalar/timedelta/test_timedelta.py b/pandas/tests/scalar/timedelta/test_timedelta.py
index 9bb6c991a930a..db8a97c8adbb2 100644
--- a/pandas/tests/scalar/timedelta/test_timedelta.py
+++ b/pandas/tests/scalar/timedelta/test_timedelta.py
@@ -139,7 +139,7 @@ def generic_result(self):
                 else:
                     return self.cmp_result
 
-            def __eq__(self, other):
+            def __eq__(self, other: object):
                 return self.generic_result()
 
             def __gt__(self, other):
diff --git a/pandas/tests/scalar/timestamp/test_comparisons.py b/pandas/tests/scalar/timestamp/test_comparisons.py
index da0818c5dc596..ea41e8ed76469 100644
--- a/pandas/tests/scalar/timestamp/test_comparisons.py
+++ b/pandas/tests/scalar/timestamp/test_comparisons.py
@@ -179,7 +179,7 @@ def __gt__(self, o):
         def __ge__(self, o):
             return True
 
-        def __eq__(self, o) -> bool:
+        def __eq__(self, o: object) -> bool:
             return isinstance(o, Inf)
 
     inf = Inf()
diff --git a/pandas/tests/series/test_ufunc.py b/pandas/tests/series/test_ufunc.py
index 977e7ded1f1a7..fe5e044f3b92e 100644
--- a/pandas/tests/series/test_ufunc.py
+++ b/pandas/tests/series/test_ufunc.py
@@ -282,7 +282,7 @@ def __add__(self, other):
             other = getattr(other, "value", other)
             return type(self)(self.value + other)
 
-        def __eq__(self, other) -> bool:
+        def __eq__(self, other: object) -> bool:
             return type(other) is Thing and self.value == other.value
 
         def __repr__(self) -> str:
diff --git a/pandas/tests/test_algos.py b/pandas/tests/test_algos.py
index 02b50d84c6eca..62111be6a6d21 100644
--- a/pandas/tests/test_algos.py
+++ b/pandas/tests/test_algos.py
@@ -767,7 +767,7 @@ def test_same_object_is_in(self):
         # with similar behavior, then we at least should
         # fall back to usual python's behavior: "a in [a] == True"
         class LikeNan:
-            def __eq__(self, other) -> bool:
+            def __eq__(self, other: object) -> bool:
                 return False
 
             def __hash__(self):
diff --git a/pandas/tseries/offsets.py b/pandas/tseries/offsets.py
index 0620f2b9aae49..28a5584b00cc3 100644
--- a/pandas/tseries/offsets.py
+++ b/pandas/tseries/offsets.py
@@ -2577,7 +2577,7 @@ def __add__(self, other):
                 "will overflow".format(self=self, other=other)
             )
 
-    def __eq__(self, other) -> bool:
+    def __eq__(self, other: object) -> bool:
         if isinstance(other, str):
             from pandas.tseries.frequencies import to_offset
 

From e69277ed2b7b4a10eb6eb0c9210faa6526272f34 Mon Sep 17 00:00:00 2001
From: MomIsBestFriend <>
Date: Tue, 26 Nov 2019 02:06:37 +0200
Subject: [PATCH 3/4] Added 'Any' type annotation to 'other' in __eq__

---
 pandas/_libs/tslibs/offsets.pyx                   | 3 ++-
 pandas/core/arrays/sparse/dtype.py                | 2 +-
 pandas/core/dtypes/base.py                        | 4 ++--
 pandas/core/dtypes/dtypes.py                      | 8 ++++----
 pandas/core/indexes/frozen.py                     | 3 ++-
 pandas/io/pytables.py                             | 4 ++--
 pandas/io/stata.py                                | 3 ++-
 pandas/tests/groupby/test_function.py             | 3 ++-
 pandas/tests/indexing/test_indexing.py            | 3 ++-
 pandas/tests/scalar/timedelta/test_timedelta.py   | 3 ++-
 pandas/tests/scalar/timestamp/test_comparisons.py | 5 +++--
 pandas/tests/series/test_ufunc.py                 | 3 ++-
 pandas/tests/test_algos.py                        | 3 ++-
 pandas/tseries/offsets.py                         | 4 ++--
 14 files changed, 30 insertions(+), 21 deletions(-)

diff --git a/pandas/_libs/tslibs/offsets.pyx b/pandas/_libs/tslibs/offsets.pyx
index 9ea0f94c86e41..0bf676b6cff63 100644
--- a/pandas/_libs/tslibs/offsets.pyx
+++ b/pandas/_libs/tslibs/offsets.pyx
@@ -1,6 +1,7 @@
 import cython
 
 import time
+from typing import Any
 from cpython.datetime cimport (PyDateTime_IMPORT,
                                PyDateTime_Check,
                                PyDelta_Check,
@@ -328,7 +329,7 @@ class _BaseOffset:
     def __setattr__(self, name, value):
         raise AttributeError("DateOffset objects are immutable.")
 
-    def __eq__(self, other: object) -> bool:
+    def __eq__(self, other: Any) -> bool:
         if isinstance(other, str):
             try:
                 # GH#23524 if to_offset fails, we are dealing with an
diff --git a/pandas/core/arrays/sparse/dtype.py b/pandas/core/arrays/sparse/dtype.py
index 994f210d0f017..b53830a1eaeaa 100644
--- a/pandas/core/arrays/sparse/dtype.py
+++ b/pandas/core/arrays/sparse/dtype.py
@@ -90,7 +90,7 @@ def __hash__(self):
         # __eq__, so we explicitly do it here.
         return super().__hash__()
 
-    def __eq__(self, other: object) -> bool:
+    def __eq__(self, other: Any) -> bool:
         # We have to override __eq__ to handle NA values in _metadata.
         # The base class does simple == checks, which fail for NA.
         if isinstance(other, str):
diff --git a/pandas/core/dtypes/base.py b/pandas/core/dtypes/base.py
index 157f990f08243..063014cbe970d 100644
--- a/pandas/core/dtypes/base.py
+++ b/pandas/core/dtypes/base.py
@@ -1,5 +1,5 @@
 """Extend pandas with custom array types"""
-from typing import List, Optional, Tuple, Type
+from typing import Any, List, Optional, Tuple, Type
 
 import numpy as np
 
@@ -86,7 +86,7 @@ def __from_arrow__(
     def __str__(self) -> str:
         return self.name
 
-    def __eq__(self, other: object) -> bool:
+    def __eq__(self, other: Any) -> bool:
         """
         Check whether 'other' is equal to self.
 
diff --git a/pandas/core/dtypes/dtypes.py b/pandas/core/dtypes/dtypes.py
index d758ce7267d06..63e71183e51ef 100644
--- a/pandas/core/dtypes/dtypes.py
+++ b/pandas/core/dtypes/dtypes.py
@@ -370,7 +370,7 @@ def __hash__(self) -> int:
         # We *do* want to include the real self.ordered here
         return int(self._hash_categories(self.categories, self._ordered))
 
-    def __eq__(self, other: object) -> bool:
+    def __eq__(self, other: Any) -> bool:
         """
         Rules for CDT equality:
         1) Any CDT is equal to the string 'category'
@@ -765,7 +765,7 @@ def __hash__(self) -> int:
         # TODO: update this.
         return hash(str(self))
 
-    def __eq__(self, other: object) -> bool:
+    def __eq__(self, other: Any) -> bool:
         if isinstance(other, str):
             return other == self.name
 
@@ -904,7 +904,7 @@ def __hash__(self) -> int:
         # make myself hashable
         return hash(str(self))
 
-    def __eq__(self, other: object) -> bool:
+    def __eq__(self, other: Any) -> bool:
         if isinstance(other, str):
             return other == self.name or other == self.name.title()
 
@@ -1077,7 +1077,7 @@ def __hash__(self) -> int:
         # make myself hashable
         return hash(str(self))
 
-    def __eq__(self, other: object) -> bool:
+    def __eq__(self, other: Any) -> bool:
         if isinstance(other, str):
             return other.lower() in (self.name.lower(), str(self).lower())
         elif not isinstance(other, IntervalDtype):
diff --git a/pandas/core/indexes/frozen.py b/pandas/core/indexes/frozen.py
index e4e68f7fdfb72..e34af2ca2927c 100644
--- a/pandas/core/indexes/frozen.py
+++ b/pandas/core/indexes/frozen.py
@@ -7,6 +7,7 @@
 - .levels & .codes (FrozenNDArray)
 
 """
+from typing import Any
 import warnings
 
 import numpy as np
@@ -77,7 +78,7 @@ def __radd__(self, other):
             other = list(other)
         return self.__class__(other + list(self))
 
-    def __eq__(self, other: object) -> bool:
+    def __eq__(self, other: Any) -> bool:
         if isinstance(other, (tuple, FrozenList)):
             other = list(other)
         return super().__eq__(other)
diff --git a/pandas/io/pytables.py b/pandas/io/pytables.py
index e2a9ca299d799..3fb5bb190b0b8 100644
--- a/pandas/io/pytables.py
+++ b/pandas/io/pytables.py
@@ -1773,7 +1773,7 @@ def __repr__(self) -> str:
             )
         )
 
-    def __eq__(self, other: object) -> bool:
+    def __eq__(self, other: Any) -> bool:
         """ compare 2 col items """
         return all(
             getattr(self, a, None) == getattr(other, a, None)
@@ -2109,7 +2109,7 @@ def __repr__(self) -> str:
             )
         )
 
-    def __eq__(self, other: object) -> bool:
+    def __eq__(self, other: Any) -> bool:
         """ compare 2 col items """
         return all(
             getattr(self, a, None) == getattr(other, a, None)
diff --git a/pandas/io/stata.py b/pandas/io/stata.py
index 42c4f76c749d4..70df87fe0c63e 100644
--- a/pandas/io/stata.py
+++ b/pandas/io/stata.py
@@ -16,6 +16,7 @@
 import os
 import struct
 import sys
+from typing import Any
 import warnings
 
 from dateutil.relativedelta import relativedelta
@@ -859,7 +860,7 @@ def __repr__(self) -> str:
         # not perfect :-/
         return "{cls}({obj})".format(cls=self.__class__, obj=self)
 
-    def __eq__(self, other: object) -> bool:
+    def __eq__(self, other: Any) -> bool:
         return (
             isinstance(other, self.__class__)
             and self.string == other.string
diff --git a/pandas/tests/groupby/test_function.py b/pandas/tests/groupby/test_function.py
index 550954564ac0c..a6643f239e83e 100644
--- a/pandas/tests/groupby/test_function.py
+++ b/pandas/tests/groupby/test_function.py
@@ -3,6 +3,7 @@
 from io import StringIO
 from itertools import product
 from string import ascii_lowercase
+from typing import Any
 
 import numpy as np
 import pytest
@@ -1230,7 +1231,7 @@ def __init__(self, msg="I will raise inside Cython"):
             super().__init__()
             self.msg = msg
 
-        def __eq__(self, other: object):
+        def __eq__(self, other: Any):
             # gets called in Cython to check that raising calls the method
             raise RaisingObjectException(self.msg)
 
diff --git a/pandas/tests/indexing/test_indexing.py b/pandas/tests/indexing/test_indexing.py
index 25985c0004ef9..09e19d7abc10d 100644
--- a/pandas/tests/indexing/test_indexing.py
+++ b/pandas/tests/indexing/test_indexing.py
@@ -2,6 +2,7 @@
 
 from datetime import datetime
 import re
+from typing import Any
 import weakref
 
 import numpy as np
@@ -595,7 +596,7 @@ def __str__(self) -> str:
 
             __repr__ = __str__
 
-            def __eq__(self, other: object) -> bool:
+            def __eq__(self, other: Any) -> bool:
                 return self.value == other.value
 
             def view(self):
diff --git a/pandas/tests/scalar/timedelta/test_timedelta.py b/pandas/tests/scalar/timedelta/test_timedelta.py
index db8a97c8adbb2..82b65fe114dc2 100644
--- a/pandas/tests/scalar/timedelta/test_timedelta.py
+++ b/pandas/tests/scalar/timedelta/test_timedelta.py
@@ -1,6 +1,7 @@
 """ test the scalar Timedelta """
 from datetime import timedelta
 import re
+from typing import Any
 
 import numpy as np
 import pytest
@@ -139,7 +140,7 @@ def generic_result(self):
                 else:
                     return self.cmp_result
 
-            def __eq__(self, other: object):
+            def __eq__(self, other: Any):
                 return self.generic_result()
 
             def __gt__(self, other):
diff --git a/pandas/tests/scalar/timestamp/test_comparisons.py b/pandas/tests/scalar/timestamp/test_comparisons.py
index ea41e8ed76469..7de9d2636c6e3 100644
--- a/pandas/tests/scalar/timestamp/test_comparisons.py
+++ b/pandas/tests/scalar/timestamp/test_comparisons.py
@@ -1,5 +1,6 @@
 from datetime import datetime
 import operator
+from typing import Any
 
 import numpy as np
 import pytest
@@ -179,8 +180,8 @@ def __gt__(self, o):
         def __ge__(self, o):
             return True
 
-        def __eq__(self, o: object) -> bool:
-            return isinstance(o, Inf)
+        def __eq__(self, other: Any) -> bool:
+            return isinstance(other, Inf)
 
     inf = Inf()
     timestamp = Timestamp("2018-11-30")
diff --git a/pandas/tests/series/test_ufunc.py b/pandas/tests/series/test_ufunc.py
index fe5e044f3b92e..82447a9d8cd01 100644
--- a/pandas/tests/series/test_ufunc.py
+++ b/pandas/tests/series/test_ufunc.py
@@ -1,5 +1,6 @@
 from collections import deque
 import string
+from typing import Any
 
 import numpy as np
 import pytest
@@ -282,7 +283,7 @@ def __add__(self, other):
             other = getattr(other, "value", other)
             return type(self)(self.value + other)
 
-        def __eq__(self, other: object) -> bool:
+        def __eq__(self, other: Any) -> bool:
             return type(other) is Thing and self.value == other.value
 
         def __repr__(self) -> str:
diff --git a/pandas/tests/test_algos.py b/pandas/tests/test_algos.py
index 62111be6a6d21..570fa9f3a5c82 100644
--- a/pandas/tests/test_algos.py
+++ b/pandas/tests/test_algos.py
@@ -1,6 +1,7 @@
 from datetime import datetime
 from itertools import permutations
 import struct
+from typing import Any
 
 import numpy as np
 from numpy.random import RandomState
@@ -767,7 +768,7 @@ def test_same_object_is_in(self):
         # with similar behavior, then we at least should
         # fall back to usual python's behavior: "a in [a] == True"
         class LikeNan:
-            def __eq__(self, other: object) -> bool:
+            def __eq__(self, other: Any) -> bool:
                 return False
 
             def __hash__(self):
diff --git a/pandas/tseries/offsets.py b/pandas/tseries/offsets.py
index 28a5584b00cc3..b1af0dd0c7d50 100644
--- a/pandas/tseries/offsets.py
+++ b/pandas/tseries/offsets.py
@@ -1,7 +1,7 @@
 from datetime import date, datetime, timedelta
 import functools
 import operator
-from typing import Optional
+from typing import Any, Optional
 
 from dateutil.easter import easter
 import numpy as np
@@ -2577,7 +2577,7 @@ def __add__(self, other):
                 "will overflow".format(self=self, other=other)
             )
 
-    def __eq__(self, other: object) -> bool:
+    def __eq__(self, other: Any) -> bool:
         if isinstance(other, str):
             from pandas.tseries.frequencies import to_offset
 

From 0bf439b45fce5c4203b735a9550c95f31d359480 Mon Sep 17 00:00:00 2001
From: MomIsBestFriend <>
Date: Wed, 27 Nov 2019 15:05:27 +0200
Subject: [PATCH 4/4] Annotations to __eq__ function

---
 pandas/_libs/tslibs/offsets.pyx                   | 3 +--
 pandas/core/arrays/sparse/dtype.py                | 2 +-
 pandas/core/dtypes/base.py                        | 4 ++--
 pandas/core/dtypes/dtypes.py                      | 6 +++---
 pandas/core/indexes/frozen.py                     | 3 +--
 pandas/io/pytables.py                             | 4 ++--
 pandas/io/stata.py                                | 3 +--
 pandas/tests/groupby/test_function.py             | 3 +--
 pandas/tests/indexing/test_indexing.py            | 3 +--
 pandas/tests/scalar/timedelta/test_timedelta.py   | 3 +--
 pandas/tests/scalar/timestamp/test_comparisons.py | 3 +--
 pandas/tests/series/test_ufunc.py                 | 3 +--
 pandas/tests/test_algos.py                        | 3 +--
 pandas/tseries/offsets.py                         | 4 ++--
 14 files changed, 19 insertions(+), 28 deletions(-)

diff --git a/pandas/_libs/tslibs/offsets.pyx b/pandas/_libs/tslibs/offsets.pyx
index 0bf676b6cff63..327d1067dd17d 100644
--- a/pandas/_libs/tslibs/offsets.pyx
+++ b/pandas/_libs/tslibs/offsets.pyx
@@ -1,7 +1,6 @@
 import cython
 
 import time
-from typing import Any
 from cpython.datetime cimport (PyDateTime_IMPORT,
                                PyDateTime_Check,
                                PyDelta_Check,
@@ -329,7 +328,7 @@ class _BaseOffset:
     def __setattr__(self, name, value):
         raise AttributeError("DateOffset objects are immutable.")
 
-    def __eq__(self, other: Any) -> bool:
+    def __eq__(self, other) -> bool:
         if isinstance(other, str):
             try:
                 # GH#23524 if to_offset fails, we are dealing with an
diff --git a/pandas/core/arrays/sparse/dtype.py b/pandas/core/arrays/sparse/dtype.py
index b53830a1eaeaa..3b656705f5568 100644
--- a/pandas/core/arrays/sparse/dtype.py
+++ b/pandas/core/arrays/sparse/dtype.py
@@ -90,7 +90,7 @@ def __hash__(self):
         # __eq__, so we explicitly do it here.
         return super().__hash__()
 
-    def __eq__(self, other: Any) -> bool:
+    def __eq__(self, other) -> bool:
         # We have to override __eq__ to handle NA values in _metadata.
         # The base class does simple == checks, which fail for NA.
         if isinstance(other, str):
diff --git a/pandas/core/dtypes/base.py b/pandas/core/dtypes/base.py
index 063014cbe970d..8acdf32c8768e 100644
--- a/pandas/core/dtypes/base.py
+++ b/pandas/core/dtypes/base.py
@@ -1,5 +1,5 @@
 """Extend pandas with custom array types"""
-from typing import Any, List, Optional, Tuple, Type
+from typing import List, Optional, Tuple, Type
 
 import numpy as np
 
@@ -86,7 +86,7 @@ def __from_arrow__(
     def __str__(self) -> str:
         return self.name
 
-    def __eq__(self, other: Any) -> bool:
+    def __eq__(self, other) -> bool:
         """
         Check whether 'other' is equal to self.
 
diff --git a/pandas/core/dtypes/dtypes.py b/pandas/core/dtypes/dtypes.py
index 63e71183e51ef..2c601b01dbae5 100644
--- a/pandas/core/dtypes/dtypes.py
+++ b/pandas/core/dtypes/dtypes.py
@@ -765,7 +765,7 @@ def __hash__(self) -> int:
         # TODO: update this.
         return hash(str(self))
 
-    def __eq__(self, other: Any) -> bool:
+    def __eq__(self, other) -> bool:
         if isinstance(other, str):
             return other == self.name
 
@@ -904,7 +904,7 @@ def __hash__(self) -> int:
         # make myself hashable
         return hash(str(self))
 
-    def __eq__(self, other: Any) -> bool:
+    def __eq__(self, other) -> bool:
         if isinstance(other, str):
             return other == self.name or other == self.name.title()
 
@@ -1077,7 +1077,7 @@ def __hash__(self) -> int:
         # make myself hashable
         return hash(str(self))
 
-    def __eq__(self, other: Any) -> bool:
+    def __eq__(self, other) -> bool:
         if isinstance(other, str):
             return other.lower() in (self.name.lower(), str(self).lower())
         elif not isinstance(other, IntervalDtype):
diff --git a/pandas/core/indexes/frozen.py b/pandas/core/indexes/frozen.py
index e34af2ca2927c..13c386187a9e5 100644
--- a/pandas/core/indexes/frozen.py
+++ b/pandas/core/indexes/frozen.py
@@ -7,7 +7,6 @@
 - .levels & .codes (FrozenNDArray)
 
 """
-from typing import Any
 import warnings
 
 import numpy as np
@@ -78,7 +77,7 @@ def __radd__(self, other):
             other = list(other)
         return self.__class__(other + list(self))
 
-    def __eq__(self, other: Any) -> bool:
+    def __eq__(self, other) -> bool:
         if isinstance(other, (tuple, FrozenList)):
             other = list(other)
         return super().__eq__(other)
diff --git a/pandas/io/pytables.py b/pandas/io/pytables.py
index 7ac3942ef0893..35205aa7dc267 100644
--- a/pandas/io/pytables.py
+++ b/pandas/io/pytables.py
@@ -1764,7 +1764,7 @@ def __repr__(self) -> str:
             )
         )
 
-    def __eq__(self, other: Any) -> bool:
+    def __eq__(self, other) -> bool:
         """ compare 2 col items """
         return all(
             getattr(self, a, None) == getattr(other, a, None)
@@ -2092,7 +2092,7 @@ def __repr__(self) -> str:
             )
         )
 
-    def __eq__(self, other: Any) -> bool:
+    def __eq__(self, other) -> bool:
         """ compare 2 col items """
         return all(
             getattr(self, a, None) == getattr(other, a, None)
diff --git a/pandas/io/stata.py b/pandas/io/stata.py
index 70df87fe0c63e..bd5e215730397 100644
--- a/pandas/io/stata.py
+++ b/pandas/io/stata.py
@@ -16,7 +16,6 @@
 import os
 import struct
 import sys
-from typing import Any
 import warnings
 
 from dateutil.relativedelta import relativedelta
@@ -860,7 +859,7 @@ def __repr__(self) -> str:
         # not perfect :-/
         return "{cls}({obj})".format(cls=self.__class__, obj=self)
 
-    def __eq__(self, other: Any) -> bool:
+    def __eq__(self, other) -> bool:
         return (
             isinstance(other, self.__class__)
             and self.string == other.string
diff --git a/pandas/tests/groupby/test_function.py b/pandas/tests/groupby/test_function.py
index a6643f239e83e..c41f762e9128d 100644
--- a/pandas/tests/groupby/test_function.py
+++ b/pandas/tests/groupby/test_function.py
@@ -3,7 +3,6 @@
 from io import StringIO
 from itertools import product
 from string import ascii_lowercase
-from typing import Any
 
 import numpy as np
 import pytest
@@ -1231,7 +1230,7 @@ def __init__(self, msg="I will raise inside Cython"):
             super().__init__()
             self.msg = msg
 
-        def __eq__(self, other: Any):
+        def __eq__(self, other):
             # gets called in Cython to check that raising calls the method
             raise RaisingObjectException(self.msg)
 
diff --git a/pandas/tests/indexing/test_indexing.py b/pandas/tests/indexing/test_indexing.py
index ba41c9d41431d..09a66efb6a312 100644
--- a/pandas/tests/indexing/test_indexing.py
+++ b/pandas/tests/indexing/test_indexing.py
@@ -2,7 +2,6 @@
 
 from datetime import datetime
 import re
-from typing import Any
 import weakref
 
 import numpy as np
@@ -596,7 +595,7 @@ def __str__(self) -> str:
 
             __repr__ = __str__
 
-            def __eq__(self, other: Any) -> bool:
+            def __eq__(self, other) -> bool:
                 return self.value == other.value
 
             def view(self):
diff --git a/pandas/tests/scalar/timedelta/test_timedelta.py b/pandas/tests/scalar/timedelta/test_timedelta.py
index e03719f02481b..d4881ff0e1747 100644
--- a/pandas/tests/scalar/timedelta/test_timedelta.py
+++ b/pandas/tests/scalar/timedelta/test_timedelta.py
@@ -1,7 +1,6 @@
 """ test the scalar Timedelta """
 from datetime import timedelta
 import re
-from typing import Any
 
 import numpy as np
 import pytest
@@ -134,7 +133,7 @@ def generic_result(self):
                 else:
                     return self.cmp_result
 
-            def __eq__(self, other: Any):
+            def __eq__(self, other):
                 return self.generic_result()
 
             def __gt__(self, other):
diff --git a/pandas/tests/scalar/timestamp/test_comparisons.py b/pandas/tests/scalar/timestamp/test_comparisons.py
index 7de9d2636c6e3..fce4fa6eb1eaa 100644
--- a/pandas/tests/scalar/timestamp/test_comparisons.py
+++ b/pandas/tests/scalar/timestamp/test_comparisons.py
@@ -1,6 +1,5 @@
 from datetime import datetime
 import operator
-from typing import Any
 
 import numpy as np
 import pytest
@@ -180,7 +179,7 @@ def __gt__(self, o):
         def __ge__(self, o):
             return True
 
-        def __eq__(self, other: Any) -> bool:
+        def __eq__(self, other) -> bool:
             return isinstance(other, Inf)
 
     inf = Inf()
diff --git a/pandas/tests/series/test_ufunc.py b/pandas/tests/series/test_ufunc.py
index 82447a9d8cd01..977e7ded1f1a7 100644
--- a/pandas/tests/series/test_ufunc.py
+++ b/pandas/tests/series/test_ufunc.py
@@ -1,6 +1,5 @@
 from collections import deque
 import string
-from typing import Any
 
 import numpy as np
 import pytest
@@ -283,7 +282,7 @@ def __add__(self, other):
             other = getattr(other, "value", other)
             return type(self)(self.value + other)
 
-        def __eq__(self, other: Any) -> bool:
+        def __eq__(self, other) -> bool:
             return type(other) is Thing and self.value == other.value
 
         def __repr__(self) -> str:
diff --git a/pandas/tests/test_algos.py b/pandas/tests/test_algos.py
index 570fa9f3a5c82..02b50d84c6eca 100644
--- a/pandas/tests/test_algos.py
+++ b/pandas/tests/test_algos.py
@@ -1,7 +1,6 @@
 from datetime import datetime
 from itertools import permutations
 import struct
-from typing import Any
 
 import numpy as np
 from numpy.random import RandomState
@@ -768,7 +767,7 @@ def test_same_object_is_in(self):
         # with similar behavior, then we at least should
         # fall back to usual python's behavior: "a in [a] == True"
         class LikeNan:
-            def __eq__(self, other: Any) -> bool:
+            def __eq__(self, other) -> bool:
                 return False
 
             def __hash__(self):
diff --git a/pandas/tseries/offsets.py b/pandas/tseries/offsets.py
index b1af0dd0c7d50..0620f2b9aae49 100644
--- a/pandas/tseries/offsets.py
+++ b/pandas/tseries/offsets.py
@@ -1,7 +1,7 @@
 from datetime import date, datetime, timedelta
 import functools
 import operator
-from typing import Any, Optional
+from typing import Optional
 
 from dateutil.easter import easter
 import numpy as np
@@ -2577,7 +2577,7 @@ def __add__(self, other):
                 "will overflow".format(self=self, other=other)
             )
 
-    def __eq__(self, other: Any) -> bool:
+    def __eq__(self, other) -> bool:
         if isinstance(other, str):
             from pandas.tseries.frequencies import to_offset