大家好,今天我将向您展示如何使用 python 和 flask 创建一个简单的货币转换器并将其显示在网络上。
首先我们需要确保 flask 已正确安装,为此,在 windows 中打开 powershell 或 cmd,并确保以管理员身份运行,右键单击它,然后以管理员身份运行,flask 很容易通过键入以下内容安装命令:
pip 安装烧瓶
安装python之后,当然你可以查看这个链接来了解如何在Windows上安装python:
立即学习“Python免费学习笔记(深入)”;
(https://www.geeksforgeeks.org/how-to-install-python-on-windows/)
成功安装flask后,创建一个名为currency_converter的文件夹,并在该文件夹内创建一个名为app.py的txt文件,并确保将扩展名从.txt更改为.py,然后在currency_converter文件夹内创建另一个名为(templates)的文件夹并制作确保此文件夹的名称与 templates 完全相同,否则 flask 将无法运行,然后在 templates 文件夹中创建一个名为 index.html 的文件,您可以创建一个 txt 文件,然后将其重命名为 index.html 并确保扩展名是.html
这是app.py文件的代码:
from flask import flask, render_template, request, redirect, url_for import requests app = flask(__name__) api_url = "https://api.exchangerate-api.com/v4/latest/{}" @app.route("/", methods=["get", "post"]) def index(): if request.method == "post": from_currency = request.form["from_currency"].upper() to_currency = request.form["to_currency"].upper() amount = float(request.form["amount"]) # fetch exchange rate data response = requests.get(api_url.format(from_currency)) if response.status_code == 200: data = response.json() rates = data.get("rates", {}) if to_currency in rates: conversion_rate = rates[to_currency] converted_amount = amount * conversion_rate return render_template( "index.html", converted_amount=converted_amount, from_currency=from_currency, to_currency=to_currency, amount=amount, ) else: error = f"currency '{to_currency}' not found." return render_template("index.html", error=error) else: error = f"error fetching data for '{from_currency}'." return render_template("index.html", error=error) return render_template("index.html") if __name__ == "__main__": app.run(debug=true)
这是带有 css 的 html 文件的代码:
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Currency Converter</title> <style> /* General body styling */ body { font-family: 'Arial', sans-serif; margin: 0; padding: 0; background: linear-gradient(135deg, #6dd5fa, #2980b9); color: white; display: flex; justify-content: center; align-items: center; height: 100vh; } /* Centering the container */ .container { background: #ffffff10; /* Semi-transparent white */ border-radius: 10px; padding: 20px 30px; max-width: 400px; width: 100%; box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3); text-align: center; } /* Header styling */ h1 { font-size: 28px; margin-bottom: 20px; color: #fff; text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.8); } /* Input and button styling */ input, button { display: block; width: 100%; margin: 10px 0; padding: 12px; font-size: 16px; border: none; border-radius: 5px; } input { background: #ffffff80; /* Semi-transparent white */ color: #333; } button { background: #2980b9; color: #fff; font-weight: bold; cursor: pointer; transition: background 0.3s ease; } button:hover { background: #1e5786; } /* Result message styling */ .result { background: red; padding: 10px; border-radius: 5px; margin-top: 20px; text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.7); } .result p { margin: 0; font-size: 18px; } /* Error message styling */ .error { color: #ff4d4d; margin: 10px 0; font-weight: bold; } /* Responsive design */ @media (max-width: 480px) { .container { padding: 15px 20px; } h1 { font-size: 22px; } input, button { font-size: 14px; } } </style> </head> <body> <div class="container"> <h1>Currency Converter</h1> {% if error %} <p class="error">{{ error }}</p> {% endif %} {% if converted_amount %} <div class="result"> <p>{{ amount }} {{ from_currency }} = {{ converted_amount | round(2) }} {{ to_currency }}</p> </div> {% endif %} <form method="POST" action="/"> <input type="text" name="from_currency" placeholder="From currency (e.g., USD)" required> <input type="text" name="to_currency" placeholder="To currency (e.g., EUR)" required> <input type="number" step="0.01" name="amount" placeholder="Amount" required> <button type="submit">Convert</button> </form> </div> </body> </html>
然后打开 powershell 或 cmd 并导航到您的currency_converter 文件夹位置并输入:
烧瓶运行
这将在您的计算机上创建一个网络服务器,其 ip 和端口号如下:
http://127.0.0.1:5000
打开网络浏览器,然后复制该地址并将其粘贴到您的浏览器中,然后尝试货币转换器。
有关代码的货币列表,请查看此网站:
(https://taxsummaries.pwc.com/glossary/currency-codes)
非常享受并感谢您。