Build A Currency Converter App – Python Tkinter GUI Tutorial #171

In this video I’ll show you how to create a basic Currency Converter app with Tkinter and Python!

We’ll add two tabs to our app. In the first one you’ll enter the two currencies you’d like to convert. In the second tab you’ll do the actual conversion.

There’s a lot of fun things to learn in this one!

Python Code: currency.py
(Github Code)

from tkinter import *
from tkinter import ttk
from tkinter import messagebox


root = Tk()
root.title('Codemy.com - Currency Conversion')
root.iconbitmap('c:/gui/codemy.ico')
root.geometry("500x500")

# Create Tabs
my_notebook = ttk.Notebook(root)
my_notebook.pack(pady=5)

# Create Two Frames
currency_frame = Frame(my_notebook, width=480, height=480)
conversion_frame = Frame(my_notebook, width=480, height=480)

currency_frame.pack(fill="both", expand=1)
conversion_frame.pack(fill="both", expand=1)

# Add our Tabs
my_notebook.add(currency_frame, text="Currencies")
my_notebook.add(conversion_frame, text="Convert")

# Disable 2nd tab
my_notebook.tab(1, state='disabled')

#######################
# CURRENCY STUFF
#######################
def lock():
	if not home_entry.get() or not conversion_entry.get() or not rate_entry.get():
		messagebox.showwarning("WARNING!", "You Didn't Fill Out All The Fields")	
	else:
		# Disable entry boxes
		home_entry.config(state="disabled")
		conversion_entry.config(state="disabled")
		rate_entry.config(state="disabled")
		# Enable tab
		my_notebook.tab(1, state='normal')
		# Change Tab Field
		amount_label.config(text=f'Amount of {home_entry.get()} To Convert To {conversion_entry.get()}')
		converted_label.config(text=f'Equals This Many {conversion_entry.get()}')
		convert_button.config(text=f'Convert From {home_entry.get()}')
def unlock():
	# Enable entry boxes
	home_entry.config(state="normal")
	conversion_entry.config(state="normal")
	rate_entry.config(state="normal")
	# Disable Tab
	my_notebook.tab(1, state='disabled')
home = LabelFrame(currency_frame, text="Your Home Currency")
home.pack(pady=20)

# Home currency entry box
home_entry = Entry(home, font=("Helvetica", 24))
home_entry.pack(pady=10, padx=10)

# Conversion Currency Frame
conversion = LabelFrame(currency_frame, text="Conversion Currency")
conversion.pack(pady=20)

# convert to label
conversion_label = Label(conversion, text="Currency To Convert To...")
conversion_label.pack(pady=10)

# Convert To Entry
conversion_entry = Entry(conversion, font=("Helvetica", 24))
conversion_entry.pack(pady=10, padx=10)

# rate label
rate_label = Label(conversion, text="Current Conversion Rate...")
rate_label.pack(pady=10)

# Rate To Entry
rate_entry = Entry(conversion, font=("Helvetica", 24))
rate_entry.pack(pady=10, padx=10)

# Button Frame
button_frame = Frame(currency_frame)
button_frame.pack(pady=20)

# Create Buttons
lock_button = Button(button_frame, text="Lock", command=lock)
lock_button.grid(row=0, column=0, padx=10)

unlock_button = Button(button_frame, text="Unlock", command=unlock)
unlock_button.grid(row=0, column=1, padx=10)


#######################
# CONVERSION STUFF
#######################
def convert():
	# Clear Converted Entry Box
	converted_entry.delete(0, END)

	# Convert
	conversion = float(rate_entry.get()) * float(amount_entry.get())
	# Convert to two decimals
	conversion = round(conversion,2)
	# Add commas
	conversion = '{:,}'.format(conversion)
	# Upodate entry box
	converted_entry.insert(0, f'${conversion}')	
def clear():
	amount_entry.delete(0, END)
	converted_entry.delete(0, END)

amount_label = LabelFrame(conversion_frame, text="Amount To Conver")
amount_label.pack(pady=20)

# Entry Box For Amount
amount_entry = Entry(amount_label, font=("Helvetica", 24))
amount_entry.pack(pady=10, padx=10)

# Convert Button
convert_button = Button(amount_label, text="Convert", command=convert)
convert_button.pack(pady=20)

# Equals Frame
converted_label = LabelFrame(conversion_frame, text="Converted Currency")
converted_label.pack(pady=20)

# Converted entry
converted_entry = Entry(converted_label, font=("Helvetica", 24), bd=0, bg="systembuttonface")
converted_entry.pack(pady=10, padx=10)

# Clear Button
clear_button = Button(conversion_frame, text="Clear", command=clear)
clear_button.pack(pady=20)

# Fake Label for spacing
spacer = Label(conversion_frame, text="", width=68)
spacer.pack()


root.mainloop()