smesh/doc/examples/modifying_meshes_ex05.py

# Add Triangle

from mechanic import *

# add node
n1 = mesh.AddNode(50, 10, 0)
if n1 == 0: print("KO node addition.")

# add triangle
t1 = mesh.AddFace([n1, 38, 39])
if t1 == 0: print("KO triangle addition.")
else:       print("New Triangle has been added with ID ", t1)