_pickle.UnpicklingError: pickle data was truncated报错解决

File "", line 1, in <module>File "xx/anaconda/lib/python3.7/multiprocessing/spawn.py", line 105, in spawn_mainexitcode = _main(fd)File "xx/anaconda/lib/python3.7/multiprocessing/spawn.py", line 115, in _mainself = reduction.pickle.load(from_parent)_pickle.UnpicklingError: pickle data was truncated

解决办法： 把读取数据的进程数num_workers改小。