Fix RangeIndex implementation to avoid test changes

Author: Dr-Irv

pandas/core/indexes/range.py

@@ -6,6 +6,7 @@
 import numpy as np
 
 from pandas._libs import index as libindex
+from pandas._libs import lib
 import pandas.compat as compat
 from pandas.compat import get_range_parameters, lrange, range
 from pandas.compat.numpy import function as nv
@@ -502,7 +503,12 @@ def __getitem__(self, key):
         super_getitem = super(RangeIndex, self).__getitem__
 
         if is_scalar(key):
-            n = int(key)
+            if not lib.is_integer(key):
+                raise IndexError("only integers, slices (`:`), "
+                                 "ellipsis (`...`), numpy.newaxis (`None`) "
+                                 "and integer or boolean "
+                                 "arrays are valid indices")
+            n = com.cast_scalar_indexer(key)
             if n != key:
                 return super_getitem(key)
             if n < 0:
@@ -653,7 +659,8 @@ def _evaluate_numeric_binop(self, other):
                     return op(self._int64index, other)
                     # TODO: Do attrs get handled reliably?
 
-            return _evaluate_numeric_binop
+            name = '__{name}__'.format(name=op.__name__)
+            return compat.set_function_name(_evaluate_numeric_binop, name, cls)
 
         cls.__add__ = _make_evaluate_binop(operator.add)
         cls.__radd__ = _make_evaluate_binop(ops.radd)

pandas/tests/indexes/test_base.py

@@ -715,10 +715,7 @@ def test_empty_fancy_raises(self, attr):
     # FutureWarning from non-tuple sequence of nd indexing
     @pytest.mark.filterwarnings("ignore::FutureWarning")
     def test_getitem_error(self, indices, itm):
-        error_type = IndexError
-        if isinstance(indices, RangeIndex) and (itm == 'no_int'):
-            error_type = ValueError
-        with pytest.raises(error_type):
+        with pytest.raises(IndexError):
             indices[itm]
 
     def test_intersection(self):
@@ -2581,10 +2578,6 @@ def test_generated_op_names(opname, indices):
         # pd.Index.__rsub__ does not exist; though the method does exist
         # for subclasses.  see GH#19723
         return
-    if (isinstance(index, RangeIndex) and
-        opname in ['add', 'radd', 'sub', 'rsub',
-                   'mul', 'rmul', 'truediv', 'rtruediv']):
-        pytest.skip("RangeIndex does operators differently")
     opname = '__{name}__'.format(name=opname)
     method = getattr(index, opname)
     assert method.__name__ == opname