REGR: exceptions not caught in _call_map_locations (pandas-dev#34113)

Author: simonjayhawkins

doc/source/whatsnew/v1.0.4.rst

@@ -23,6 +23,7 @@ Fixed regressions
 - Bug where an ordered :class:`Categorical` containing only ``NaN`` values would raise rather than returning ``NaN`` when taking the minimum or maximum  (:issue:`33450`)
 - Bug in :meth:`DataFrameGroupBy.agg` with dictionary input losing ``ExtensionArray`` dtypes (:issue:`32194`)
 - Fix to preserve the ability to index with the "nearest" method with xarray's CFTimeIndex, an :class:`Index` subclass (`pydata/xarray#3751 <https://github.com/pydata/xarray/issues/3751>`_, :issue:`32905`).
+- Fix regression in :meth:`DataFrame.describe` raising ``TypeError: unhashable type: 'dict'`` (:issue:`32409`)
 - Bug in :meth:`DataFrame.replace` casts columns to ``object`` dtype if items in ``to_replace`` not in values (:issue:`32988`)
 - 
 

pandas/_libs/index.pyx

@@ -270,7 +270,7 @@ cdef class IndexEngine:
 
         self.need_unique_check = 0
 
-    cdef void _call_map_locations(self, values):
+    cpdef _call_map_locations(self, values):
         self.mapping.map_locations(values)
 
     def clear_mapping(self):
@@ -509,7 +509,7 @@ cdef class PeriodEngine(Int64Engine):
     cdef _get_index_values(self):
         return super(PeriodEngine, self).vgetter()
 
-    cdef void _call_map_locations(self, values):
+    cpdef _call_map_locations(self, values):
         # super(...) pattern doesn't seem to work with `cdef`
         Int64Engine._call_map_locations(self, values.view('i8'))
 

pandas/_libs/index_class_helper.pxi.in

@@ -38,7 +38,7 @@ cdef class {{name}}Engine(IndexEngine):
             raise KeyError(val)
     {{endif}}
 
-    cdef void _call_map_locations(self, values):
+    cpdef _call_map_locations(self, values):
         # self.mapping is of type {{hashtable_name}}HashTable,
         # so convert dtype of values
         self.mapping.map_locations(algos.ensure_{{hashtable_dtype}}(values))