Change app.yaml to use Python 2.7
Change app.yaml to use Python 2.7

bolshoibooze/sympy_gamma,kaichogami/sympy_gamma,iScienceLuvr/sympy_gamma,debugger22/sympy_gamma,debugger22/sympy_gamma,github4ry/sympy_gamma,github4ry/sympy_gamma,bolshoibooze/sympy_gamma,iScienceLuvr/sympy_gamma,bolshoibooze/sympy_gamma,iScienceLuvr/sympy_gamma,kaichogami/sympy_gamma,github4ry/sympy_gamma,kaichogami/sympy_gamma