汇率转换器(汇率转换器欧元)

前沿拓展：

汇率转换器(汇率转换器欧元)

Python为开发GUI（图形用户界面）提供了多种选项。在所有的GUI方法中，tkinter是最常用的方法。它是Python附带的Tk GUI工具包的标准Python接口。Python with tkinter是创建GUI应用程序的最快和最简单的方法。

创建一个tkinter：

1）导入模块tkinter

2）创建主窗口（容器）

3）将任意数量的小部件添加到主窗口。

4）将事件触发器应用于小部件。

让我们创建一个基于GUI的简单实时货币转换器，该转换器可以将金额从一种货币转换为另一种货币。

所需模块：

tkinter
requests
json

下面是实现：

# 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 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("400×175")

# 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()

输出：

汇率转换器(汇率转换器欧元)

拓展知识：