COMM_WORLD
mpi4py.MPI.COMM_WORLD.Get_size失败——mpiexec and python mpi4py gives rank 0 and size 1
参考： https://stackoverflow.com/questions/29264640/mpiexec-and-python-mpi4py-gives-rank-0-and-size-1 运行代码： import mpi4py.MPI as MPI comm = MPI.COMM_WORL ......