threading.local support

[KRRT7]

MRE

import dill as pickle

import threading


import dill


def main():
    local = threading.local()

    print(dill.loads(pickle.dumps(local)))


if __name__ == "__main__":
    main()

error:

(scipy-dev) (base) krrt7@arm64-apple-darwin20 scipy % /Users/krrt7/miniforge3/envs/scipy-dev/bin/python /Users/krrt7/Desktop/work/scipy/MRE.py
Traceback (most recent call last):
  File "/Users/krrt7/Desktop/work/scipy/MRE.py", line 16, in <module>
    main()
  File "/Users/krrt7/Desktop/work/scipy/MRE.py", line 12, in main
    print(dill.loads(pickle.dumps(local)))
                     ^^^^^^^^^^^^^^^^^^^
  File "/Users/krrt7/miniforge3/envs/scipy-dev/lib/python3.12/site-packages/dill/_dill.py", line 288, in dumps
    dump(obj, file, protocol, byref, fmode, recurse, **kwds)#, strictio)
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/krrt7/miniforge3/envs/scipy-dev/lib/python3.12/site-packages/dill/_dill.py", line 260, in dump
    Pickler(file, protocol, **_kwds).dump(obj)
  File "/Users/krrt7/miniforge3/envs/scipy-dev/lib/python3.12/site-packages/dill/_dill.py", line 428, in dump
    StockPickler.dump(self, obj)
  File "/Users/krrt7/miniforge3/envs/scipy-dev/lib/python3.12/pickle.py", line 484, in dump
    self.save(obj)
  File "/Users/krrt7/miniforge3/envs/scipy-dev/lib/python3.12/site-packages/dill/_dill.py", line 422, in save
    StockPickler.save(self, obj, save_persistent_id)
  File "/Users/krrt7/miniforge3/envs/scipy-dev/lib/python3.12/pickle.py", line 576, in save
    rv = reduce(self.proto)
         ^^^^^^^^^^^^^^^^^^
TypeError: cannot pickle '_thread._local' object