I am trying to build a toolbox which would first take some inputs and execute some code and return me results. After the results I would like toolbox to ask me for new parameters so I can use these results. 

Here is my idea with the code 

```
# -*- coding: utf-8 -*-

import arcpy


class Toolbox(object):
    def __init__(self):
        """Define the toolbox (the name of the toolbox is the name of the
        .pyt file)."""
        self.label = "Toolbox"
        self.alias = "toolbox"

        # List of tool classes associated with this toolbox
        self.tools = [Tool]


class Tool(object):
    def __init__(self):
        """Define the tool (tool name is the name of the class)."""
        self.label = "Tool"
        self.description = ""
        self.canRunInBackground = False

    def getParameterInfo(self):
        """Define parameter definitions"""

        input_folder = arcpy.Parameter(
            name='input_folder',
            displayName='Input Folder',
            datatype='DEWorkspace',
            direction='Input',
            parameterType='Required')

        params = [input_folder]
        
        return params

    def isLicensed(self):
        """Set whether tool is licensed to execute."""
        return True

    def updateParameters(self, parameters):
        """Modify the values and properties of parameters before internal
        validation is performed.  This method is called whenever a parameter
        has been changed."""
        return

    def updateMessages(self, parameters):
        """Modify the messages created by internal validation for each tool
        parameter.  This method is called after internal validation."""
        return

    def execute(self, parameters, messages):
        """The source code of the tool."""

        #show me some results which i will make use.

        #execute something to get new parameter from user input and make operation.
        
        #and make the operation.
        return