utils.py 文件源码

def op_to_opstr(op):
    if op is operator.le:
        return "<="
    elif op is operator.ge:
        return ">="
    elif op is operator.eq:
        return "="
    elif op is operator.add:
        return "+"
    elif op is operator.sub:
        return "-"
    elif op is operator.mul:
        return "*"
    elif op is operator.div:
        return "/"
    else:
        raise Exception("Operator '{}' not supported yet.", op)