Getting at the mystery object

demo.py

from ctypes import *
pythonapi.PyDict_SetItemString.argtypes=[c_void_p, c_char_p, c_void_p]
class PyObject(Structure):
  _fields_ = [("refcnt", c_size_t),
      ("typeid", c_void_p)]

pythonapi.PyThreadState_GetDict.restype = POINTER(PyObject)
pythonapi.PyDict_SetItemString(c_void_p(id(locals())), b"threaddict", pythonapi.PyThreadState_GetDict())
repr([1])
print(threaddict)

# Output
# {'Py_Repr': [{...}, [...]]}