KineticLawIdentifier.py 文件源码

def getReversibleRates(self, formula):

        t_forward = None
        t_backward = None
        formula = simplify(formula)
        # print formula
        # If we had an addition
        if formula.func == SympyAdd:
            # print srepr(formula)
            # And one of the terms
            for arg in formula.args:

                # is *(-1)
                if arg.func == SympyMul:
                    if (arg.args[0] == SympyInteger(-1)
                        or arg.args[1] == SympyInteger(-1)):
                        t_backward = arg*SympyInteger(-1)
        else:
            return (formula,SympyInteger(0))

        t_forward = SympyAdd(formula, t_backward)

        return (t_forward, t_backward)