Rabased and added typing

pandas/core/indexes/range.py

@@ -1,6 +1,7 @@
 from datetime import timedelta
 import operator
 from sys import getsizeof
+from typing import Union
 import warnings
 
 import numpy as np
@@ -334,7 +335,7 @@ def is_monotonic_decreasing(self):
     def has_duplicates(self):
         return False
 
-    def __contains__(self, key):
+    def __contains__(self, key: Union[int, np.integer]) -> bool:
         hash(key)
         try:
             key = ensure_python_int(key)
@@ -648,10 +649,10 @@ def __floordiv__(self, other):
                 return self._simple_new(start, start + 1, 1, name=self.name)
         return self._int64index // other
 
-    def all(self):
+    def all(self) -> bool:
         return 0 not in self._range
 
-    def any(self):
+    def any(self) -> bool:
         return any(self._range)
 
     @classmethod

pandas/tests/indexes/test_range.py

@@ -247,7 +247,7 @@ def test_dtype(self):
     def test_cached_data(self):
         # GH 26565, GH26617
         # Calling RangeIndex._data caches an int64 array of the same length at
-        # self._cached_data. This tests whether _cached_data has been set.
+        # self._cached_data. This test checks whether _cached_data has been set
         idx = RangeIndex(0, 100, 10)
 
         assert idx._cached_data is None