def ord_str(sv, dict): v = dict[sv] # 0 or 1 or 2 or . . return str(v) If you want to use some other form of encoding, such as effect coding or orthogonal encoding, you would define a helper function ...

A basic requirement for growth and life of a multicellular organism is the ability of its cells to divide. A protein complex, the so-called centrosome, plays a major role during cell division.