Hi All,

I am working on a little side project for myself. i have created an interface which contains two listboxes and a few buttons. Clicking on each button would load separate csv files and they would populate in listbox 1. This is as far as i have gotten, what i want to do is when i click on an item for it to be moved to listbox 2 and then have the ability to create a new csv file with the newly gathered items. Below is the code showing as far as i have gotten.

import csv
from Tkinter import *
import Tkinter as tk
import tkMessageBox

def passfile(value):
    listbox.delete(0, END)
    f = open(value)
    csv_fi = csv.reader(f)
    for x in csv_fi:
        listbox.insert(tk.END, x[0])
    f.close()

root = tk.Tk()

# Create a GUI window named Colors File Generator
root.title("Colors File Generator")
root.option_add('*font', ('verdana', 12, 'bold'))
root.geometry('{}x{}'.format(680,800))

#Create two list boxes next to each other.
listbox = tk.Listbox(root, width=40, height=10)
listbox.grid(row=0, column=1)
listbox1 = tk.Listbox(root, width=40, height=10)
listbox1.grid(row=0, column=2)

#Create a scrollbar for the first listbox
yscroll = tk.Scrollbar(command=listbox.yview, orient=tk.VERTICAL)
yscroll.grid(row=0, column=0, sticky=tk.N+tk.S)
listbox.configure(yscrollcommand=yscroll.set)

#Create a scrollbar for the second listbox
yscroll1 = tk.Scrollbar(command=listbox1.yview, orient=tk.VERTICAL)
yscroll1.grid(row=0, column=3, sticky=tk.N+tk.S)
listbox1.configure(yscrollcommand=yscroll1.set)

#Create the buttons for the Specific Brands
button1 = tk.Button(root, text='List1', command= lambda:passfile('attendees.csv'))
button1.grid(row=1, column=1, sticky=tk.W)

button2 = tk.Button(root, text='List2' , command= lambda:passfile('attendees2.csv'))
button2.grid(row=2, column=1, sticky=tk.W)

button3 = tk.Button(root, text='List3' , command= lambda:passfile('attendees2.csv'))
button3.grid(row=3, column=1, sticky=tk.W)

button4 = tk.Button(root, text='List4' , command= lambda:passfile('attendees2.csv'))
button4.grid(row=4, column=1, sticky=tk.W)

button5 = tk.Button(root, text='List5' , command= lambda:passfile('attendees2.csv'))
button5.grid(row=5, column=1, sticky=tk.W)

button6 = tk.Button(root, text='List6' , command= lambda:passfile('attendees2.csv'))
button6.grid(row=6, column=1, sticky=tk.W)

#Create Button to save, download and delete the selected colors
button7 = tk.Button(root, text="Save Values", command=lambda:Save_Values)
button7.grid(row=1, column=2, sticky=tk.E)

#Create Button to Generate and save the file
button8 = tk.Button(root, text="Save File", command=lambda:Save_file)
button8.grid(row=2, column=2, sticky=tk.E)

button9 = tk.Button(root, text="Delete", command=lambda:Delete)
button9.grid(row=3, column=2, sticky=tk.E)
root.mainloop()

Well, I would first store the loaded content in a list, then populate the listbox with it.
Second, I would create a buton whose associated function performs a curselection() to get the selected items, then check if they exist in list 2 and if not, place them there. Finally this function would create a new file (you can either do it manually or use a csv library for that) and write the second list to it.

I did not understand, however, if you want to make the new file using the entire content of the second listbox or just the selected items.