import tkinter as tk
from tkinter import filedialog

class DataApplication:
    def __init__(self, window):
        self.window = window
        self.window.title("Data Processing Application")

        # Load initial dataset button
        self.load_button = tk.Button(window, text="Load CSV Files", command=self.load_csv)
        self.load_button.grid(row=0, column=0)

        # Save prepared dataset button
        self.save_button = tk.Button(window, text="Save Prepared Data", command=self.save_data)
        self.save_button.grid(row=1, column=0)

        # Generate output and visualizations button
        self.generate_button = tk.Button(window, text="Generate Output", command=self.generate_output)
        self.generate_button.grid(row=2, column=0)

        # Manipulate range of values entry and button
        self.range_entry = tk.Entry(window)
        self.range_entry.grid(row=3, column=0)
        self.range_button = tk.Button(window, text="Set Range", command=self.set_range)
        self.range_button.grid(row=3, column=1)

    def load_csv(self):
        self.csv_paths = filedialog.askopenfilenames()
        # Add logic to load and process CSV files

    def save_data(self):
        self.save_path = filedialog.asksaveasfilename()
        # Add logic to save data

    def generate_output(self):
        # Add logic to generate output and visualizations

    def set_range(self):
        range_value = self.range_entry.get()
        # Add logic to manipulate range of values based on range_value

root = tk.Tk()
app = DataApplication(root)
root.mainloop()