update comment

pandas/core/indexes/base.py

@@ -4114,7 +4114,7 @@ def _has_complex_internals(self):
  """
  Indicates if an index is not directly backed by a numpy array
  """
- # used to disable groupby tricks
+ # used to avoid libreduction code paths, which raise or require conversion
  return False
 
  def _is_memory_usage_qualified(self) -> bool:

pandas/core/indexes/category.py

@@ -380,7 +380,7 @@ def values(self):
 
  @property
  def _has_complex_internals(self):
- # to disable groupby tricks
+ # used to avoid libreduction code paths, which raise or require conversion
  return True
 
  def _wrap_setop_result(self, other, result):

pandas/core/indexes/interval.py

@@ -413,7 +413,7 @@ def values(self):
 
  @property
  def _has_complex_internals(self):
- # to disable groupby tricks
+ # used to avoid libreduction code paths, which raise or require conversion
  return True
 
  def __array_wrap__(self, result, context=None):

pandas/core/indexes/multi.py

@@ -1348,7 +1348,7 @@ def values(self):
 
  @property
  def _has_complex_internals(self):
- # to disable groupby tricks
+ # used to avoid libreduction code paths, which raise or require conversion
  return True
 
  @cache_readonly

pandas/core/indexes/period.py

@@ -257,7 +257,7 @@ def values(self):
 
  @property
  def _has_complex_internals(self):
- # to disable groupby tricks
+ # used to avoid libreduction code paths, which raise or require conversion
  return True
 
  def _shallow_copy(self, values=None, **kwargs):