programmable Source with type vtkMolecule fails to set its output
Assuming "output" is defined as a vtkMolecule , but the following python code fails:
`import numpy as np
data = np.array([ ['C', 2.16065, -0.78200, 0.32718], ['S', 0.92180, 1.79289, 0.66141], ['H', 0.08296, -2.67747, 1.28327]])
nbAtoms = data.shape[0]
for i in range(nbAtoms): output.AppendAtom(data[0][i], data[1][i], data[2][i], data[3][i]) `
AttributeError: 'NoneType' object has no attribute 'AppendAtom'