From db3ce46848b6c07a8dc76b7adb3624a9872923aa Mon Sep 17 00:00:00 2001
From: Oleh Prypin <oprypin@google.com>
Date: Mon, 28 Oct 2024 06:49:56 -0700
Subject: [PATCH] Remove unnecessary `__ne__` fallbacks

Such a fallback is already implicitly provided by Python since 3.0

https://docs.python.org/3/reference/datamodel.html#object.__ne__

PiperOrigin-RevId: 690592635
---
 build_scripts/build_utils.py | 14 ++++----------
 pytype/abstract/_classes.py  |  3 ---
 pytype/abstract/_typing.py   |  6 ------
 pytype/pytd/booleq.py        |  9 ---------
 pytype/pytd/pytd.py          |  3 ---
 5 files changed, 4 insertions(+), 31 deletions(-)

diff --git a/build_scripts/build_utils.py b/build_scripts/build_utils.py
index b26ab4209..79ed5ea6d 100644
--- a/build_scripts/build_utils.py
+++ b/build_scripts/build_utils.py
@@ -43,16 +43,10 @@ def save_to_cache_file(self):
       )
 
   def __eq__(self, other):
-    return all([
-        self.py_version == other.py_version,
-        self.build_type == other.build_type,
-    ])
-
-  def __ne__(self, other):
-    return any([
-        self.py_version != other.py_version,
-        self.build_type != other.build_type,
-    ])
+    return (
+        self.py_version == other.py_version
+        and self.build_type == other.build_type
+    )
 
   @classmethod
   def current_build_config(cls, debug):
diff --git a/pytype/abstract/_classes.py b/pytype/abstract/_classes.py
index 85215ccb3..bd3302d2d 100644
--- a/pytype/abstract/_classes.py
+++ b/pytype/abstract/_classes.py
@@ -785,9 +785,6 @@ def __eq__(self, other: "ParameterizedClass") -> bool:
       )
     return NotImplemented
 
-  def __ne__(self, other: "ParameterizedClass") -> bool:
-    return not self == other
-
   def __hash__(self):
     if self._hash is None:
       if isinstance(
diff --git a/pytype/abstract/_typing.py b/pytype/abstract/_typing.py
index f9a4999b2..36f1aa4d6 100644
--- a/pytype/abstract/_typing.py
+++ b/pytype/abstract/_typing.py
@@ -542,9 +542,6 @@ def __eq__(self, other: "_TypeVariable") -> bool:
       )
     return NotImplemented
 
-  def __ne__(self, other: "_TypeVariable") -> bool:
-    return not self == other
-
   def __hash__(self) -> int:
     return hash((
         self.name,
@@ -710,9 +707,6 @@ def __eq__(self, other: "Union") -> bool:
       return self.options == other.options
     return NotImplemented
 
-  def __ne__(self, other: "Union") -> bool:
-    return not self == other
-
   def __hash__(self) -> int:
     # Use the names of the parameter values to approximate a hash, to avoid
     # infinite recursion on recursive type annotations.
diff --git a/pytype/pytd/booleq.py b/pytype/pytd/booleq.py
index d9173a252..e56abf18b 100644
--- a/pytype/pytd/booleq.py
+++ b/pytype/pytd/booleq.py
@@ -170,9 +170,6 @@ def __eq__(self, other):
         and self.right == other.right
     )
 
-  def __ne__(self, other):
-    return not self == other
-
   def simplify(self, assignments):
     """Simplify this equality.
 
@@ -236,9 +233,6 @@ def __init__(self, exprs):
   def __eq__(self, other):
     return self.__class__ == other.__class__ and self.exprs == other.exprs
 
-  def __ne__(self, other):
-    return not self == other
-
   def __repr__(self):
     return f"And({list(self.exprs)!r})"
 
@@ -288,9 +282,6 @@ def __init__(self, exprs):
   def __eq__(self, other):  # for unit tests
     return self.__class__ == other.__class__ and self.exprs == other.exprs
 
-  def __ne__(self, other):
-    return not self == other
-
   def __repr__(self):
     return f"Or({list(self.exprs)!r})"
 
diff --git a/pytype/pytd/pytd.py b/pytype/pytd/pytd.py
index 23be32cfd..d0957b49d 100644
--- a/pytype/pytd/pytd.py
+++ b/pytype/pytd/pytd.py
@@ -562,9 +562,6 @@ def __eq__(self, other):
       return frozenset(self.type_list) == frozenset(other.type_list)
     return NotImplemented
 
-  def __ne__(self, other):
-    return not self == other
-
   def __hash__(self):
     return hash(self.type_list)