BUG: DatetimeIndex.slice_locs() doesn't hande date objects not in index #34077
Description
I would expect [7] below to return the same result as [5] (just as [6] returns the same result as [4]).
In [1]: import pandas as pd, datetime as dt
In [2]: pd.__version__
Out[2]: '1.0.3'
In [3]: a = pd.DatetimeIndex(['2010-01-01', '2010-01-03'])
In [4]: a.slice_locs(dt.datetime(2010, 1, 1), dt.datetime(2010, 1, 3))
Out[4]: (0, 2)
In [5]: a.slice_locs(dt.datetime(2010, 1, 1), dt.datetime(2010, 1, 2))
Out[5]: (0, 1)
In [6]: a.slice_locs(dt.date(2010, 1, 1), dt.date(2010, 1, 3))
Out[6]: (0, 2)
In [7]: a.slice_locs(dt.date(2010, 1, 1), dt.date(2010, 1, 2))
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
pandas/_libs/index.pyx in pandas._libs.index.DatetimeEngine.get_loc()
pandas/_libs/hashtable_class_helper.pxi in pandas._libs.hashtable.Int64HashTable.get_item()
TypeError: an integer is required
During handling of the above exception, another exception occurred:
KeyError Traceback (most recent call last)
~/.conda/envs/build/lib/python3.7/site-packages/pandas/core/indexes/base.py in get_loc(self, key, method, tolerance)
2645 try:
-> 2646 return self._engine.get_loc(key)
2647 except KeyError:
pandas/_libs/index.pyx in pandas._libs.index.DatetimeEngine.get_loc()
pandas/_libs/index.pyx in pandas._libs.index.DatetimeEngine.get_loc()
pandas/_libs/index.pyx in pandas._libs.index.DatetimeEngine._date_check_type()
KeyError: datetime.date(2010, 1, 2)
During handling of the above exception, another exception occurred:
TypeError Traceback (most recent call last)
pandas/_libs/index.pyx in pandas._libs.index.DatetimeEngine.get_loc()
pandas/_libs/hashtable_class_helper.pxi in pandas._libs.hashtable.Int64HashTable.get_item()
TypeError: an integer is required
During handling of the above exception, another exception occurred:
KeyError Traceback (most recent call last)
~/.conda/envs/build/lib/python3.7/site-packages/pandas/core/indexes/datetimes.py in get_loc(self, key, method, tolerance)
714 try:
--> 715 return Index.get_loc(self, key, method, tolerance)
716 except (KeyError, ValueError, TypeError):
~/.conda/envs/build/lib/python3.7/site-packages/pandas/core/indexes/base.py in get_loc(self, key, method, tolerance)
2647 except KeyError:
-> 2648 return self._engine.get_loc(self._maybe_cast_indexer(key))
2649 indexer = self.get_indexer([key], method=method, tolerance=tolerance)
pandas/_libs/index.pyx in pandas._libs.index.DatetimeEngine.get_loc()
pandas/_libs/index.pyx in pandas._libs.index.DatetimeEngine.get_loc()
pandas/_libs/index.pyx in pandas._libs.index.DatetimeEngine._date_check_type()
KeyError: datetime.date(2010, 1, 2)
During handling of the above exception, another exception occurred:
KeyError Traceback (most recent call last)
pandas/_libs/index.pyx in pandas._libs.index.DatetimeEngine.get_loc()
pandas/_libs/hashtable_class_helper.pxi in pandas._libs.hashtable.Int64HashTable.get_item()
pandas/_libs/hashtable_class_helper.pxi in pandas._libs.hashtable.Int64HashTable.get_item()
KeyError: 1262390400000000000
During handling of the above exception, another exception occurred:
KeyError Traceback (most recent call last)
~/.conda/envs/build/lib/python3.7/site-packages/pandas/core/indexes/base.py in get_loc(self, key, method, tolerance)
2645 try:
-> 2646 return self._engine.get_loc(key)
2647 except KeyError:
pandas/_libs/index.pyx in pandas._libs.index.DatetimeEngine.get_loc()
pandas/_libs/index.pyx in pandas._libs.index.DatetimeEngine.get_loc()
KeyError: Timestamp('2010-01-02 00:00:00')
During handling of the above exception, another exception occurred:
KeyError Traceback (most recent call last)
pandas/_libs/index.pyx in pandas._libs.index.DatetimeEngine.get_loc()
pandas/_libs/hashtable_class_helper.pxi in pandas._libs.hashtable.Int64HashTable.get_item()
pandas/_libs/hashtable_class_helper.pxi in pandas._libs.hashtable.Int64HashTable.get_item()
KeyError: 1262390400000000000
During handling of the above exception, another exception occurred:
KeyError Traceback (most recent call last)
~/.conda/envs/build/lib/python3.7/site-packages/pandas/core/indexes/datetimes.py in get_loc(self, key, method, tolerance)
727 stamp = stamp.tz_localize(self.tz)
--> 728 return Index.get_loc(self, stamp, method, tolerance)
729 except KeyError:
~/.conda/envs/build/lib/python3.7/site-packages/pandas/core/indexes/base.py in get_loc(self, key, method, tolerance)
2647 except KeyError:
-> 2648 return self._engine.get_loc(self._maybe_cast_indexer(key))
2649 indexer = self.get_indexer([key], method=method, tolerance=tolerance)
pandas/_libs/index.pyx in pandas._libs.index.DatetimeEngine.get_loc()
pandas/_libs/index.pyx in pandas._libs.index.DatetimeEngine.get_loc()
KeyError: Timestamp('2010-01-02 00:00:00')
During handling of the above exception, another exception occurred:
KeyError Traceback (most recent call last)
~/.conda/envs/build/lib/python3.7/site-packages/pandas/core/indexes/base.py in get_slice_bound(self, label, side, kind)
4840 try:
-> 4841 slc = self.get_loc(label)
4842 except KeyError as err:
~/.conda/envs/build/lib/python3.7/site-packages/pandas/core/indexes/datetimes.py in get_loc(self, key, method, tolerance)
729 except KeyError:
--> 730 raise KeyError(key)
731 except ValueError as e:
KeyError: datetime.date(2010, 1, 2)
During handling of the above exception, another exception occurred:
TypeError Traceback (most recent call last)
<ipython-input-7-f3a1babc1d65> in <module>
----> 1 a.slice_locs(dt.date(2010, 1, 1), dt.date(2010, 1, 2))
~/.conda/envs/build/lib/python3.7/site-packages/pandas/core/indexes/base.py in slice_locs(self, start, end, step, kind)
4929 end_slice = None
4930 if end is not None:
-> 4931 end_slice = self.get_slice_bound(end, "right", kind)
4932 if end_slice is None:
4933 end_slice = len(self)
~/.conda/envs/build/lib/python3.7/site-packages/pandas/core/indexes/base.py in get_slice_bound(self, label, side, kind)
4842 except KeyError as err:
4843 try:
-> 4844 return self._searchsorted_monotonic(label, side)
4845 except ValueError:
4846 # raise the original KeyError
~/.conda/envs/build/lib/python3.7/site-packages/pandas/core/indexes/base.py in _searchsorted_monotonic(self, label, side)
4793 def _searchsorted_monotonic(self, label, side="left"):
4794 if self.is_monotonic_increasing:
-> 4795 return self.searchsorted(label, side=side)
4796 elif self.is_monotonic_decreasing:
4797 # np.searchsorted expects ascending sort order, have to reverse
~/.conda/envs/build/lib/python3.7/site-packages/pandas/core/indexes/datetimes.py in searchsorted(self, value, side, sorter)
858 elif not isinstance(value, DatetimeArray):
859 raise TypeError(
--> 860 "searchsorted requires compatible dtype or scalar, "
861 f"not {type(value).__name__}"
862 )
TypeError: searchsorted requires compatible dtype or scalar, not date