code: def read_from_file(cls, filename):
          
          with open(filename) as f:
              lines = list(line for line in f if line[0] != '#')
          r = []
          t = []
          for line in lines[:3]:
              values = list(float(word) for word in line.split())
              r.append(values[:3])
              t.append(values[3])
          transformation = Complete(r, t)
          affected_atoms = set(int(word) for word in lines[3].split())
          return cls(affected_atoms, transformation)
docs: Construct a MolecularDistortion object from a file