计算科学 - 使用 Numpy 和 petsc4py 时出现 32 位/64 位问题 - 吾爱随笔录

A使用数组c（numpy.ndarraywith ）索引 PETSc.Mat时dtype('int64')，遇到以下错误：

  File "/Users/cls/workspace/LAMG-Python/src/lamg/amg/setup.py", line 945, in buildInternal
    Acc = A[c, c]
  File "Mat.pyx", line 185, in petsc4py.PETSc.Mat.__getitem__ (src/petsc4py.PETSc.c:71407)
  File "petscmat.pxi", line 862, in petsc4py.PETSc.mat_getitem (src/petsc4py.PETSc.c:22442)
  File "petscmat.pxi", line 773, in petsc4py.PETSc.matgetvalues (src/petsc4py.PETSc.c:21226)
  File "arraynpy.pxi", line 123, in petsc4py.PETSc.iarray_i (src/petsc4py.PETSc.c:5284)
  File "arraynpy.pxi", line 117, in petsc4py.PETSc.iarray (src/petsc4py.PETSc.c:5192)
TypeError: Cannot cast array data from dtype('int64') to dtype('int32') according to the rule 'safe'

我假设有一个简单的解决方案（允许演员，使一切 32 或 64 位......）。你能为我指出正确的方向吗？谢谢。