classic_gym/cost/__init__.py
def gen_cost_sympy_function(self):
        """
            returns stage and terminal cost function in sympy
        """
        raise NotImplementedError

            returns stage and terminal cost function in sympy
        
returns stage and terminal cost function in sympy
returns stage and terminal cost function in sympy
def gen_cost_sympy_function(self):
        raise NotImplementedError
def gen_cost_sympy_function ( self ) : raise NotImplementedError
returns stage and terminal cost function in sympy
returns stage and terminal cost function in sympy
"""
            returns stage and terminal cost function in sympy
        """
self