我分散了嵌套字典的列表，没有任何大于200000的数字，所有大小都在500M左右。
Traceback (most recent call last):
File "test.py", line 220, in <module>
recv = comm.scatter(send, root=0)
File "MPI/Comm.pyx", line 1286, in mpi4py.MPI.Comm.scatter (src/mpi4py.MPI.c:109079)
File "MPI/msgpickle.pxi", line 707, in mpi4py.MPI.PyMPI_scatter (src/mpi4py.MPI.c:48114)
File "MPI/msgpickle.pxi", line 168, in mpi4py.MPI.Pickle.dumpv (src/mpi4py.MPI.c:41672)
File "MPI/msgbuffer.pxi", line 35, in mpi4py.MPI.downcast (src/mpi4py.MPI.c:29070)
OverflowError: integer 2333441511 does not fit in 'int'