bcast finished
data on rank 0 is:  {'key1': [10, 10.1, (10+11j)], 'key2': ('mpi4py', 'python'), 'key3': array([1, 2, 3])}
data on rank 1 is:  {'key1': [10, 10.1, (10+11j)], 'key2': ('mpi4py', 'python'), 'key3': array([1, 2, 3])}
data on rank 2 is:  {'key1': [10, 10.1, (10+11j)], 'key2': ('mpi4py', 'python'), 'key3': array([1, 2, 3])}
data on rank 3 is:  {'key1': [10, 10.1, (10+11j)], 'key2': ('mpi4py', 'python'), 'key3': array([1, 2, 3])}