Open3d: "TypeError: crop(): argumen fungsi yang tidak kompatibel" di "examples/Python/Basic/half_edge_mesh.py"

Jelaskan bugnya
Saya tidak dapat menjalankan contoh half_edge_mesh.py . Setelah #1218 selalu melempar

RPly: Unable to open file
[Open3D WARNING] Read PLY failed: unable to open file: ../../TestData/sphere.ply
Traceback (most recent call last):
  File "examples/Python/Basic/half_edge_mesh.py", line 28, in <module>
    mesh = mesh.crop(bbox)
TypeError: crop(): incompatible function arguments. The following argument types are supported:
    1. (self: open3d.open3d.geometry.TriangleMesh, min_bound: numpy.ndarray[float64[3, 1]], max_bound: numpy.ndarray[float64[3, 1]]) -> open3d.open3d.geometry.TriangleMesh

Invoked with: geometry::TriangleMesh with 0 points and 0 triangles., geometry::AxisAlignedBoundingBox

Dan sebelum #1218 (masih pada versi 0.8.0) ia melempar

RPly: Unable to open file
[Open3D WARNING] Read PLY failed: unable to open file: ../../TestData/sphere.ply
Traceback (most recent call last):
  File "examples/Python/Basic/half_edge_mesh.py", line 26, in <module>
    het_mesh = o3d.geometry.HalfEdgeTriangleMesh.create_from_triangle_mesh(mesh)
AttributeError: type object 'open3d.open3d.geometry.HalfEdgeTriangleMesh' has no attribute 'create_from_triangle_mesh'

Untuk Mereproduksi
Langkah-langkah untuk mereproduksi perilaku:

1. cd open3d
2. contoh python3/Python/Basic/half_edge_mesh.py
3. Lihat kesalahan

Perilaku yang diharapkan
Contoh harus bekerja.

Lingkungan (harap lengkapi informasi berikut):

• OS: OSX Mojave
• Versi Python: 3.7
• Versi Open3D: 0.8.0
• Apakah ini stasiun kerja jarak jauh?: tidak
• Bagaimana Anda menginstal Open3D?: conda

konteks tambahan
Saya mencoba memindahkan file contoh half_edge_mesh.py ke folder yang sama dengan TestData/sphere.ply dan mengedit jalurnya. Peringatan [Open3D WARNING] Read PLY failed: unable to open file: ../../TestData/sphere.ply hilang tetapi TypeError atau AttributeError masih ada.