New_App

 Finally got working code for a tkinter to Hex conversion. Below,

on a minimalist interface:

                                                

The code:                                                              

import tkinter as tk
from tkinter import*
root = Tk()
root.title('Hex Conversion')
root.geometry("600x400")
root.configure(bg='#97AAB8')

# Separate entries for rgb.

def get_rgb():
    r = my_entry_r.get()
    g = my_entry_g.get()
    b = my_entry_b.get()
    rgb = (r, g, b)

    my_tuple = list(map(int, rgb))
    my_hex = '#{:02x}{:02x}{:02x}'.format(*my_tuple)

    my_res.config(text=my_hex)

# Resets the interface.
def clear_entries():
    for widget in root.winfo_children():
        if isinstance(widget, tk.Entry):
            widget.delete(0, tk.END)
    my_res.config(text=" ")
    my_entry_r.focus()

# The top label.
my_L1 = Label(root, text='Convert from rgb to Hex', font=('Arial', 10, 'normal'))
my_L1.place(x=50, y=50)

# The entry labels for the individual channels.
my_entry_r = tk.Entry(root, width=10, font=('Arial', 10, 'normal'))
my_entry_r.place(x=50, y=150)
my_entry_g = tk.Entry(root, width=10, font=('Arial', 10, 'normal'))
my_entry_g.place(x=150, y=150)
my_entry_b = tk.Entry(root, width=10, font=('Arial', 10, 'normal'))
my_entry_b.place(x=250, y=150)

# The two buttons.
sub_btn=tk.Button(root, text='Convert', command=get_rgb)
sub_btn.place(x=50, y=250)

reset_btn = tk.Button(root, text="RESET", command=clear_entries)
reset_btn.place(x=200, y=250)

my_res = tk.Label(root, width=10, text="", font=('Arial', 10, 'normal'))
my_res.place(x=50, y=350)

# Keeping the window open...
root.mainloop() 

One function I had to research, and ended up finding on Stack Overflow, is the map() function.

I needed to change the elements in my rgb to integers, so that the hex conversion would work.

Below:

                                                              

rgb works fine f one feeds ints into it:

                                                                      

My tkinter interface was feeding in strings, making the map() function necessary:

                                  

                                                                       

There is no getting around that the get() from the entry boxes returns strings.

One would need to convert them immediately to ints, and proceed with the hex

conversion.