Requisitos previos: Introducción a tkinter | Obtenga el tipo de cambio de moneda en tiempo real
Python ofrece múltiples opciones para desarrollar GUI (interfaz gráfica de usuario). De todos los métodos GUI, tkinter es el método más utilizado. Es una interfaz estándar de Python para el kit de herramientas Tk GUI que se envía con Python. Python con tkinter produce la forma más rápida y sencilla de crear aplicaciones GUI.
Para crear un tkinter:
- Importando el módulo – tkinter
- Crear la ventana principal (contenedor)
- Agregue cualquier cantidad de widgets a la ventana principal.
- Aplique el evento Trigger en los widgets.
Vamos a crear un convertidor de moneda en tiempo real simple basado en GUI (Usando la API Alpha Vantage ) que puede convertir cantidades de una moneda a otra moneda.
Requisitos:
tkinter requests json
Nota: Necesita una clave de API para usar la API de Alpha Vantage.
Código completo :
Python3
# 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
base_url = r"https://www.alphavantage.co/query?function = CURRENCY_EXCHANGE_RATE"
# 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 converts json data type
#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 * before 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 attach
# 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 attach
# 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()
Producción :
