All In One Unit Converter GUI App in Python using Tkinter
By Swarnava BhattacharyaIn this tutorial, we’re going to learn how to create an ‘All In One Converter’ application in Python using Tkinter. Tkinter is a standard binding interface to the Tk GUI (Graphical User Interface). Tkinter is actually one of the easiest methods to implement GUI, and that’s the reason why it’s widely used.
To create a GUI using Tkinter, follow these steps:
- Import the Tkinter module in our program.
- Create the main window of the GUI with a suitable name.
- Now, we can create any number of components in our GUI window, that is already provided in the Tkinter toolkit.
- We can also specify an event trigger in each of these components.
As we are using API for currency exchange, if in the future this API stops working, you can switch to another API.
We suggest you see this: Real time currency conversion GUI application in Python using fixer io
To import the Tkinter module, use the following statement:
from tkinter import *;
Create the All in One Converter App in Python using Tkinter
Here, we’ll learn how to write the program to create an ‘All in One Converter’ app in Python, using Tkinter:-
import sys
import tkinter as tk
from tkinter import *
import urllib.request
import webbrowser
from functools import partial
from tkinter import Tk, StringVar , ttk
window = Tk()
window.title('All In One Converter')
window.geometry("450x400+100+200")
labelfont = ('arial', 56, 'bold')
l=Label(window,text='ALL IN ONE CONVERTER',font = ("Arial", 16), justify = CENTER)
l.place(x=80,y=20)
widget = Button(None, text="QUIT", bg="red", fg="black",font = ("Arial", 14, "bold"), justify = CENTER, command=window.destroy).place(x=70,y=350)
def currency_conversion():
units = {"US Dollar" : 'USD', "Euros" : 'EUR', "Indian Rupees" : 'INR', "Qatar Doha" : 'QAR', "Zimbwabe Harare" : 'ZWD', "Arab Emirates Dirham" : 'AED', "Pound Sterling" : 'GBP', "Japanese Yen" : 'JPY', "Yuan Renminbi" : 'CNY'}
def convert(val, inp, to):
html =urllib.request.urlopen("http://www.exchangerate-api.com/%s/%s/%f?k=a28d653d2d4fd2727003e437" % (inp , to, val))
return html.read().decode('utf-8')
def callback():
try:
val = float(in_field.get())
except ValueError:
out_val.set('Input is invalid')
return None
if (in_unit.get() == 'Select Unit' or out_unit.get() == 'Select Unit'):
out_val.set('Input/Output unit not chosen')
return None
else:
inp = units[in_unit.get()]
to = units[out_unit.get()]
out_val.set(convert(val, inp, to))
window = Toplevel()
window.title("Currency Conversion")
mainframe = ttk.Frame(window, padding="3 3 12 12")
mainframe.pack(fill=BOTH, expand=1)
titleLabel = Label (mainframe, text = "Currency Conversion", font = ("Arial", 12, "bold"), justify = CENTER).grid(column=1,row=1)
in_val = StringVar()
in_val.set('0')
out_val = StringVar()
in_unit = StringVar()
out_unit = StringVar()
in_unit.set('Select Unit')
out_unit.set('Select Unit')
in_field = ttk.Entry(mainframe, width=20, textvariable=in_val)
in_field.grid(row=1, column=2, sticky=(W, E))
in_select = OptionMenu(mainframe, in_unit, "US Dollar", "Euros", "Indian Rupees", "Qatar Doha", "Zimbwabe Harare", "Arab Emirates Dirham", "Pound Sterling", "Japanese Yen", "Yuan Renminbi").grid(column=3, row=1, sticky=W)
ttk.Entry(mainframe, textvariable=out_val, state="readonly").grid(column=2, row=3, sticky=(W, E))
in_select = OptionMenu(mainframe, out_unit, "US Dollar", "Euros", "Indian Rupees", "Qatar Doha", "Zimbwabe Harare", "Arab Emirates Dirham", "Pound Sterling", "Japanese Yen", "Yuan Renminbi").grid(column=3, row=3, sticky=W)
calc_button = ttk.Button(mainframe, text="Calculate",command=callback).grid(column=2, row=2, sticky=E)
for child in mainframe.winfo_children(): child.grid_configure(padx=5, pady=5)
in_field.focus()
def weight_conversion():
factors = {'kg' : 1000, 'hg' : 100, 'dg' : 10, 'g' : 1,'deg' : 0.1, 'cg' : 0.01, 'mg' : 0.001}
units = {"Kilogram" : 'kg', "Hectagram" : 'hg', "Decagram" : 'dg', "Decigram" : 'deg', "Kilogram" : 'kg', "gram" : 'g', "centigram" : 'cg', "milligram" : 'mg'}
def convert(val, inp, to):
if inp != 'g':
val = val * factors[inp]
return val / factors[to]
else:
return val / factors[to]
def callback():
try:
val = float(in_field.get())
except ValueError:
out_val.set('Invalid input')
return None
if in_unit.get() == 'Select Unit' or out_unit.get() == 'Select Unit':
out_val.set('Input or output unit not chosen')
return None
else:
inp = units[in_unit.get()]
to = units[out_unit.get()]
out_val.set(convert(val, inp, to))
window = Toplevel()
window.title("Weight Converter")
mainframe = ttk.Frame(window, padding="3 3 12 12")
mainframe.pack(fill=BOTH, expand=1)
titleLabel = Label (mainframe, text = "Weight Converter", font = ("Arial", 12, "bold"), justify = CENTER).grid(column=1,row=1)
in_val = StringVar()
in_val.set('0')
out_val = StringVar()
in_unit = StringVar()
out_unit = StringVar()
in_unit.set('Select Unit')
out_unit.set('Select Unit')
in_field = ttk.Entry(mainframe, width=20, textvariable=in_val)
in_field.grid(row=1, column=2, sticky=(W, E))
in_select = OptionMenu(mainframe, in_unit, "Kilogram","Hectagram","Decagram", "gram", "Decigram","Centigram", "Milligram") .grid(column=3, row=1, sticky=W)
ttk.Entry(mainframe, textvariable=out_val, state="readonly").grid(column=2, row=3, sticky=(W, E))
in_select = OptionMenu(mainframe, out_unit, "Kilogram","Hectagram","Decagram", "gram", "Decigram","Centigram", "Milligram").grid(column=3, row=3, sticky=W)
calc_button = ttk.Button(mainframe, text="Calculate", command=callback).grid(column=2, row=2, sticky=E)
for child in mainframe.winfo_children(): child.grid_configure(padx=5, pady=5)
in_field.focus()
def area_conversion():
wind = Toplevel()
wind.minsize(width=400, height=150)
wind.maxsize(width=400, height=150)
mf = {'square meter':1,'square km':1000000,'square rood':1011.7141056,'square cm':0.0001,'square foot':0.09290304 ,
'square inch':0.00064516, 'square mile':2589988.110336, 'milimeter':0.000001,'square rod':25.29285264,
'square yard':0.83612736, 'square township':93239571.9721, 'square acre':4046.8564224 ,'square are': 100,
'square barn':1e-28, 'square hectare':10000, 'square homestead':647497.027584 }
def convert(x, fromUnit, toUnit):
if fromVar.get() in mf.keys() and toVar.get() in mf.keys():
resultxt.delete(0, END)
result = (float(str(x))*mf[fromUnit])/(mf[toUnit])
resultxt.insert(0, str(result))
titleLabel = Label (wind, text = "Area Converter", font = ("Arial", 12, "bold"), justify = CENTER).grid(column=1,row=1)
e = Entry(wind)
e.grid(row = 1, column = 2)
values = list(mf.keys())
fromVar = StringVar(wind)
toVar = StringVar(wind)
fromVar.set("From Unit")
toVar.set("To Unit")
fromOption = OptionMenu(wind, fromVar, *values, command= lambda y: convert(e.get(), fromVar.get() ,toVar.get()))
fromOption.grid(row=1, column = 3)
toLabel = Label(wind, text="To : ", font="Arial").grid(row=2, column = 2)
toOption = OptionMenu(wind, toVar, *values, command= lambda x: convert(e.get(), fromVar.get() ,toVar.get()))
toOption.grid(row=3, column = 3)
resultxt = Entry(wind)
resultxt.grid(row=3, column=2)
def length_conversion():
factors = {'nmi' : 1852, 'mi' : 1609.34, 'yd' : 0.9144, 'ft' : 0.3048, 'inch' : 0.0254, 'km' : 1000, 'm' : 1, 'cm' : 0.01, 'mm' : 0.001}
units = {"Nautical Miles" : 'nmi', "Miles" : 'mi', "Yards" : 'yd', "Feet" : 'ft', "Inches" : 'inch', "Kilometers" : 'km', "meters" : 'm', "centimeters" : 'cm', "millileters" : 'mm'}
def convert(val, inp, to):
if inp != 'm':
val = val * factors[inp]
return val / factors[to]
else:
return val / factors[to]
def callback():
try:
val = float(in_field.get())
except ValueError:
out_val.set('Invalid input')
return None
if in_unit.get() == 'Select Unit' or out_unit.get() == 'Select Unit':
out_val.set('Input or output unit not chosen')
return None
else:
inp = units[in_unit.get()]
to = units[out_unit.get()]
out_val.set(convert(val, inp, to))
window = Toplevel()
window.title("Length Converter")
mainframe = ttk.Frame(window, padding="3 3 12 12")
mainframe.pack(fill=BOTH, expand=1)
titleLabel = Label (mainframe, text = "Length Converter", font = ("Arial", 12, "bold"), justify = CENTER).grid(column=1,row=1)
in_val = StringVar()
in_val.set('0')
out_val = StringVar()
in_unit = StringVar()
out_unit = StringVar()
in_unit.set('Select Unit')
out_unit.set('Select Unit')
in_field = ttk.Entry(mainframe, width=20, textvariable=in_val)
in_field.grid(row=1, column=2, sticky=(W, E))
in_select = OptionMenu(mainframe, in_unit, "Nautical Miles", "Miles", "Yards", "Feet", "Inches", "Kilometers", "meters", "centimeters", "millileters").grid(column=3, row=1, sticky=W)
ttk.Entry(mainframe, textvariable=out_val, state="readonly").grid(column=2, row=3, sticky=(W, E))
in_select = OptionMenu(mainframe, out_unit, "Nautical Miles", "Miles", "Yards", "Feet", "Inches", "Kilometers", "meters", "centimeters", "millileters").grid(column=3, row=3, sticky=W)
calc_button = ttk.Button(mainframe, text="Calculate", command=callback).grid(column=2, row=2, sticky=E)
for child in mainframe.winfo_children(): child.grid_configure(padx=5, pady=5)
in_field.focus()
def temp_conversion():
def convert():
celTemp = celTempVar.get()
fahTemp = fahTempVar.get()
if celTempVar.get() != 0.0:
celToFah = (celTemp * 9/5 + 32)
fahTempVar.set(celToFah)
elif fahTempVar.get() != 0.0:
fahToCel = ((fahTemp - 32) * (5/9))
celTempVar.set(fahToCel)
def reset():
top = Toplevel(padx=50, pady=50)
top.grid()
message = Label(top, text = "Reset Complete")
button = Button(top, text="OK", command=top.destroy)
message.grid(row = 0, padx = 5, pady = 5)
button.grid(row = 1, ipadx = 10, ipady = 10, padx = 5, pady = 5)
fahTempVar.set(int(0))
celTempVar.set(int(0))
top = Toplevel()
top.title("Temperature Converter")
celTempVar = IntVar()
celTempVar.set(int(0))
fahTempVar = IntVar()
fahTempVar.set(int(0))
titleLabel = Label (top, text = "Temperature Converter", font = ("Arial", 12, "bold"), justify = CENTER).grid(column=1,row=1)
celLabel = Label (top, text = "Celsius: ", font = ("Arial", 16), fg = "light green")
celLabel.grid(row = 2, column = 1, pady = 10, sticky = NW)
fahLabel = Label (top, text = "Fahrenheit: ", font = ("Arial", 16), fg = "blue")
fahLabel.grid(row = 3, column = 1, pady = 10, sticky = NW)
celEntry = Entry (top, width = 10, bd = 5, textvariable = celTempVar)
celEntry.grid(row = 2, column = 1, pady = 10, sticky = NW, padx = 125 )
fahEntry = Entry (top, width = 10, bd = 5, textvariable = fahTempVar)
fahEntry.grid(row = 3, column = 1, pady = 10, sticky = NW, padx = 125 )
convertButton =Button (top, text = "Convert", font = ("Arial", 8, "bold"), relief = RAISED, bd=5, justify = CENTER, command = convert)
convertButton.grid(row = 4, column = 1, ipady = 8, ipadx = 12, pady = 5, sticky = NW, padx = 55)
resetButton = Button (top, text = "Reset", font = ("Arial", 8, "bold"), relief = RAISED, bd=5, justify = CENTER, highlightbackground = "light green", overrelief = GROOVE, activebackground = "green", activeforeground="blue", command = reset)
resetButton.grid(row = 4, column = 2,ipady = 8, ipadx = 12, pady = 5, sticky = NW)
widget = Button(window, text="Temperature converter", bg="green" , fg="black",font = ("Arial", 14, "bold"), relief = RAISED, bd=5, justify = CENTER, command=temp_conversion).place(x=70,y=120)
widget = Button(window, text="Length Converter", bg="green" , fg="black",font = ("Arial", 14, "bold"), relief = RAISED, bd=5, justify = CENTER, command=length_conversion).place(x=70,y=180)
widget = Button(window, text="Area Converter", bg="green" , fg="black",font = ("Arial", 14, "bold"), relief = RAISED, bd=5, justify = CENTER, command=area_conversion).place(x=70,y=240)
widget = Button(window, text="Currency Converter", bg="green" , fg="black",font = ("Arial", 14, "bold"), relief = RAISED, bd=5, justify = CENTER, command=currency_conversion).place(x=70,y=60)
widget = Button(window, text="Weight Converter", bg="green" , fg="black",font = ("Arial", 14, "bold"), relief = RAISED, bd=5, justify = CENTER, command=weight_conversion).place(x=70,y=300)
window.mainloop()
After executing this code, we’ll find the ‘All in One’ application has been created and launched. Now, we’ll be able to use our own Python based converter application for various calculations.
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