Slicing an index with DateTime throws AttributeError: 'int' object has no attribute 'stop'

doc/source/whatsnew/v0.25.0.rst

@@ -672,7 +672,7 @@ Indexing
 - Bug in which :meth:`DataFrame.to_csv` caused a segfault for a reindexed data frame, when the indices were single-level :class:`MultiIndex` (:issue:`26303`).
 - Fixed bug where assigning a :class:`arrays.PandasArray` to a :class:`pandas.core.frame.DataFrame` would raise error (:issue:`26390`)
 - Allow keyword arguments for callable local reference used in the :meth:`DataFrame.query` string (:issue:`26426`)
-
+- Bug which produced ``AttributeError`` on partial matching on a TimeStamp multiindex  (:issue:`26944`)
 
 Missing
 ^^^^^^^

pandas/core/indexes/multi.py

@@ -2755,7 +2755,9 @@ def convert_indexer(start, stop, step, indexer=indexer,
                 # a partial date slicer on a DatetimeIndex generates a slice
                 # note that the stop ALREADY includes the stopped point (if
                 # it was a string sliced)
-                return convert_indexer(start.start, stop.stop, step)
+                start = getattr(start, 'start', start)
+                stop = getattr(stop, 'stop', stop)
+                return convert_indexer(start, stop, step)
 
             elif level > 0 or self.lexsort_depth == 0 or step is not None:
                 # need to have like semantics here to right