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29 lines
672 B
29 lines
672 B
6 years ago
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import datetime
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import requests
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API_URL = 'https://api.exchangeratesapi.io/latest'
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class ExchangeRatesError(Exception):
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pass
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class ExchangeRates(object):
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def __init__(self):
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self.cache = {}
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def query(self):
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today = datetime.datetime.utcnow().date().isoformat()
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try:
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base, rates = self.cache[today]
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except KeyError:
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try:
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data = requests.get(API_URL).json()
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base, rates = data['base'], data['rates']
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self.cache[data['date']] = base, rates
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except Exception as e:
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raise ExchangeRatesError(str(e))
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return base, rates
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