cell_set.py

>>>> platform.python_implementation()
'PyPy'
>>>> sys.version_info
(major=2, minor=7, micro=13, releaselevel='final', serial=42)
>>>> def f():
....     a = 'ayy'
....     def g():
....         cell_set((lambda: a).__closure__[0], 'lmao')
....     g()
....     return a
....     
>>>> f()
'lmao'