汇率兑换程序python怎么写

此外，你还需要安装`requests`库，可以使用以下命令来安装：```pipinstallrequests```

以下是一个简单的汇率兑换程序Python代码，它使用汇率API来获取实时汇率。

``` python

import requests

# 获取汇率

def get_exchange_rate(from_currency, to_currency):

api_key = "YOUR_API_KEY" # 替换为你的API密钥

url = f"https://v6.exchangerate-api.com/v6/{api_key}/latest/{from_currency}"

response = requests.get(url)

data = response.json()

if data["result"] == "error":

raise Exception(f"获取汇率失败：{data['error-type']}")

# 将汇率转换为目标货币单位

exchange_rate = data["conversion_rates"][to_currency]

return exchange_rate

# 兑换货币

def convert_currency(amount, from_currency, to_currency):

exchange_rate = get_exchange_rate(from_currency, to_currency)

converted_amount = amount * exchange_rate

return converted_amount

# 测试程序

amount = 100 # 货币数量

from_currency = "USD" # 原始货币

to_currency = "CNY" # 目标货币

converted_amount = convert_currency(amount, from_currency, to_currency)

print(f"{amount} {from_currency} = {converted_amount} {to_currency}")

```

要运行程序，你需要替换`YOUR_API_KEY`为你的API密钥。你可以在https://www.exchangerate-api.com/上注册并获取一个免费API密钥。此外，你还需要安装`requests`库，可以使用以下命令来安装：

```

pip install requests

```