fix: fixed module import from core

Author: sy-cui

distmeshpy/mesh/distmesh3d.py

@@ -8,7 +8,7 @@
 from scipy.spatial import Delaunay  # type: ignore
 
 from distmeshpy._typing import Array, Float, Function, Triangulation
-from distmeshpy.core import apply_force_3d
+from distmeshpy.core import apply_force_3d, tetrahedron_find_edges
 from distmeshpy.utils.config import DistMeshConfig, default_3d_config
 
 

examples/3d_examples/unit_sphere.py

@@ -1,7 +1,7 @@
 import matplotlib.pyplot as plt
 from distmeshpy import distmesh3d
 from distmeshpy.utils import dsphere, huniform
-from distmeshpy.tetrahedron_utils import tetrahedron_find_surface
+from distmeshpy.core.tetrahedron_utils import tetrahedron_find_surface
 
 if __name__ == "__main__":
     pos, tet = distmesh3d(