types._cell_factory is exposed, unlike other helpers

types.py module has different helpers to get their types, like async def _c(): pass to get coroutine type or def _g(): yield 1 to get generator type, etc.

It has has these line to get CellType:

cpython/Lib/types.py

Lines 18 to 23 in 9625de6

    
           def _cell_factory(): 
        
               a = 1 
        
               def f(): 
        
                   nonlocal a 
        
               return f.__closure__[0] 
        
           CellType = type(_cell_factory())

Afterward, all helpers are deleted, except _cell_factory, which I think should be fixed. It is not good to expose such implementation details.

And this line agrees with me:

cpython/Lib/types.py

Line 63 in 9625de6

del sys, _f, _g, _C, _c, _ag # Not for export

pythongh-96415: Remove `types._cell_factory` from a module namespace (p…

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`types._cell_factory` is exposed, unlike other helpers #96415

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	def _cell_factory():
	a = 1
	def f():
	nonlocal a
	return f.__closure__[0]
	CellType = type(_cell_factory())

types._cell_factory is exposed, unlike other helpers #96415

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`types._cell_factory` is exposed, unlike other helpers #96415