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update doc to reflect better empty dataframe check

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Robert Caulk 2021-05-17 11:40:57 +02:00 committed by GitHub
parent 6542070afa
commit 860a4d2390
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1 changed files with 3 additions and 2 deletions
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docs/strategy-advanced.md
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@ -65,9 +65,10 @@ class AwesomeStrategy(IStrategy):
trade_date = timeframe_to_prev_date(self.timeframe, trade.open_date_utc)
# Look up trade candle.
trade_candle = dataframe.loc[dataframe['date'] == trade_date]
# trade_candle may be None for trades that just opened as it is still incomplete.
if trade_candle is not None:
# trade_candle may be empty for trades that just opened as it is still incomplete.
if trade_candle.empty:
# <...>
trade_candle = trade_candle.squeeze()
```
!!! Warning "Using .iloc[-1]"