We need plyfile
pip install plyfile
demo
import numpy as np
vertices = np.random.randn(5,3)
vertices = np.array([tuple(e) for e in vertices], dtype=[('x', '<f4'), ('y', '<f4'), ('z', '<f4')])
el = PlyElement.describe(vertices, 'vertex',{'some_property': 'f8'},{'some_property': 'u4'})
# text = True: save in ascii format
PlyData([el], text=True).write("test.ply")
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