Python | Real time currency convertor using Tkinter
Prerequisites : Introduction to tkinter | Get the real time currency exchange rate
Python offers multiple options for developing GUI (Graphical User Interface). Out of all the GUI methods, tkinter is the most commonly used method. It is a standard Python interface to the Tk GUI toolkit shipped with Python. Python with tkinter outputs the fastest and easiest way to create the GUI applications.
To create a tkinter :
- Importing the module – tkinter
- Create the main window (container)
- Add any number of widgets to the main window.
- Apply the event Trigger on the widgets.
Let’s create a GUI based simple Real-time currency convertor (Using Alpha Vantage API) which can convert amounts from one currency to another currency.
Modules required:
tkinter requests json
Below is the implementation :
# import all functions from the tkinter from tkinter import * # Create a GUI window root = Tk() # create a global variables variable1 = StringVar(root) variable2 = StringVar(root) # initialise the variables variable1.set("currency") variable2.set("currency") # Function to perform real time conversion # from one currency to another currency def RealTimeCurrencyConversion(): # importing required libraries import requests, json # currency code from_currency = variable1.get() to_currency = variable2.get() # enter your api key here api_key = "Your_Api_Key" # base_url variable store base url # main_url variable store complete url main_url = base_url + "&from_currency =" + from_currency + "&to_currency =" + to_currency + "&apikey =" + api_key # get method of requests module # return response object req_ob = requests.get(main_url) # json method return json format # data into python dictionary data type. # result contains list of nested dictionaries result = req_ob.json() # parsing the required information Exchange_Rate = float(result["Realtime Currency Exchange Rate"] ['5. Exchange Rate']) # get method of Entry widget # returns current text as a # string from text entry box. amount = float(Amount1_field.get()) # calculation for the conversion new_amount = round(amount * Exchange_Rate, 3) # insert method inserting the # value in the text entry box. Amount2_field.insert(0, str(new_amount)) # Function for clearing the Entry field def clear_all() : Amount1_field.delete(0, END) Amount2_field.delete(0, END) # Driver code if __name__ == "__main__" : # Set the background colour of GUI window root.configure(background = 'light green') # Set the configuration of GUI window (WidthxHeight) root.geometry("400x175") # Create welcome to Real Time Currency Convertor label headlabel = Label(root, text = 'welcome to Real Time Currency Convertor', fg = 'black', bg = "red") # Create a "Amount :" label label1 = Label(root, text = "Amount :", fg = 'black', bg = 'dark green') # Create a "From Currency :" label label2 = Label(root, text = "From Currency", fg = 'black', bg = 'dark green') # Create a "To Currency: " label label3 = Label(root, text = "To Currency :", fg = 'black', bg = 'dark green') # Create a "Converted Amount :" label label4 = Label(root, text = "Converted Amount :", fg = 'black', bg = 'dark green') # grid method is used for placing # the widgets at respective positions # in table like structure . headlabel.grid(row = 0, column = 1) label1.grid(row = 1, column = 0) label2.grid(row = 2, column = 0) label3.grid(row = 3, column = 0) label4.grid(row = 5, column = 0) # Create a text entry box # for filling or typing the information. Amount1_field = Entry(root) Amount2_field = Entry(root) # ipadx keyword argument set width of entry space. Amount1_field.grid(row = 1, column = 1, ipadx ="25") Amount2_field.grid(row = 5, column = 1, ipadx ="25") # list of currency codes CurrenyCode_list = ["INR", "USD", "CAD", "CNY", "DKK", "EUR"] # create a drop down menu using OptionMenu function # which takes window name, variable and choices as # an argument. use * befor the name of the list, # to unpack the values FromCurrency_option = OptionMenu(root, variable1, *CurrenyCode_list) ToCurrency_option = OptionMenu(root, variable2, *CurrenyCode_list) FromCurrency_option.grid(row = 2, column = 1, ipadx = 10) ToCurrency_option.grid(row = 3, column = 1, ipadx = 10) # Create a Convert Button and attached # with RealTimeCurrencyExchangeRate function button1 = Button(root, text = "Convert", bg = "red", fg = "black", command = RealTimeCurrencyConversion) button1.grid(row = 4, column = 1) # Create a Clear Button and attached # with delete function button2 = Button(root, text = "Clear", bg = "red", fg = "black", command = clear_all) button2.grid(row = 6, column = 1) # Start the GUI root.mainloop() |
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