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# petsc4py.typing.MatAssemblySpec

petsc4py.typing.MatAssemblySpec: TypeAlias = petsc4py.PETSc.Mat.AssemblyType | bool | None

  Matrix assembly specification.

  Possible values are:

    - `Mat.AssemblyType.FINAL`

    - `Mat.AssemblyType.FLUSH`

    - `None` as `Mat.AssemblyType.FINAL`

    - `False` as `Mat.AssemblyType.FINAL`

    - `True` as `Mat.AssemblyType.FLUSH`

  See also

  `MatAssemblyType`