DearPyGUI: How can I import a simple csv file (using a file dialog run in UI) for use as a variable

For example, the use case would be the user downloading a csv file that their friend made with another copy of my program, finding it from my program using open_file_dialog and then allowing the program to use it as a list variable to create the output.

I currently have the following but when I print data it is a None object

def openFile(self, sender, data):
    open_file_dialog(callback= csvUser, extensions='.csv')
    #ensures only csvs are searched

def csvUser(self, sender, data):
    print(data)

I would like to do the following but it doesn't seem possible:

listObject = open_file_dialog(extensions='.csv')
for i in listObject:
   print(i)

Creating a minimal dearpygui with your pieces:

from dearpygui.core import *
from dearpygui.simple import *
import os

class MyClass:

    def openFile(self, sender, data):
        open_file_dialog(callback= self.csvUser, extensions='.csv')
        #ensures only csvs are searched

    def csvUser(self, sender, data):
        filename = os.sep.join(data)
        for i in open(filename,"rt"):
            print (i)

myhandler = MyClass()

with window("Open a csv"):
    add_button("Open",callback=myhandler.openFile)

start_dearpygui()