syntax fixes in shape.py
syntax fixes in shape.py

opyrant/opyrant,theilmbh/pyoperant,MarvinT/pyoperant,theilmbh/pyoperant,MarvinT/pyoperant,theilmbh/pyoperant,gentnerlab/pyoperant,opyrant/opyrant,gentnerlab/pyoperant,theilmbh/pyoperant,gentnerlab/pyoperant,gentnerlab/pyoperant,MarvinT/pyoperant