akari-bot/modules/exchange_rate/__init__.py

import datetime
import requests

from core.builtins import Bot
from core.component import module
from core.exceptions import NoReportException

exchange_rate = module('exchange_rate', 
                       desc='汇率转换器。', 
                       alias={'exchangerate': 'exchange_rate', 
                              'excr': 'exchange_rate'},
                       developers=['DoroWolf'], required_superuser = True)

api_key = 'd31697e581d5c35b038c625c'

@exchange_rate.command('<amount> <base> <target> {根据当日汇率转换货币价格。}')
async def _(msg: Bot.MessageSession):
    base_currency = msg.parsed_msg['<base>'].upper()
    target_currency = msg.parsed_msg['<target>'].upper()

#    url = f'https://v6.exchangerate-api.com/v6/{api_key}/codes'
#    response = requests.get(url)
#    if response.status_code == 200:
#            data = response.json()
#            supported_currencies = data['supported_codes']
#            unsupported_currencies = []
#            if base_currency not in supported_currencies:
#                unsupported_currencies.append(base_currency)
#            if target_currency not in supported_currencies:
#                unsupported_currencies.append(target_currency)
#            if unsupported_currencies:
#                await msg.finish(f"发生错误：无效的货币单位：{' '.join(unsupported_currencies)}")
#                exit()
#    else:
#        data = response.json()
#        error_type = data['error-type']
#        raise NoReportException(f"{error_type}")

    amount = None
    while amount is None:
        try:
            amount = float(msg.parsed_msg['<amount>'])
            if amount <= 0:
                await msg.finish("发生错误：金额必须为正数。")
        except ValueError:
            await msg.finish("发生错误：无效的金额。")

    url = f'https://v6.exchangerate-api.com/v6/{api_key}/pair/{base_currency}/{target_currency}/{amount}'
    response = requests.get(url)

    if response.status_code == 200:
        data = response.json()
        exchange_rate = data['conversion_result']
        current_time = datetime.datetime.now().strftime("%Y-%m-%d")
        await msg.finish(f'{amount} {base_currency} -> {exchange_rate} {target_currency}\n（{current_time}）')
    else:
        data = response.json()
        error_type = data['error-type']
        raise NoReportException(f"{error_type}")