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prevent error at this level when no data returned
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@@ -87,7 +87,7 @@ def get_historical_prices(source='cryptocompare', symbol=None, exchange=None,
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data = pd.DataFrame([CryptocompareHisto(**e).__dict__ for e in data])
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data = pd.DataFrame([CryptocompareHisto(**e).__dict__ for e in data])
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# Filter only valid time range
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# Filter only valid time range
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if from_time is not None and to_time is not None:
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if len(data) and from_time is not None and to_time is not None:
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data = data[(data['r_time'] >= from_time) &
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data = data[(data['r_time'] >= from_time) &
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(data['r_time'] <= to_time)]
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(data['r_time'] <= to_time)]
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