[Python] Cannot Apply + Operator Between Series[float] and float

I'm developing an indicator in Indie. I’m trying to calculate Bollinger Bands and Keltner Channels, but I’m running into an error when adding a Series[float] to a float value.

Here’s the error message:

Error: 20:20 cannot apply operator + to operands of types: <class 'indie.Series[float]'> and <class 'float'>
​

Here’s the relevant code snippet:

sDev = StdDev.new(self.close, length)
mid_line_bb = Sma.new(self.close, length)
lower_band_bb = mid_line_bb + num_dev_dn * sDev[0] # <-- ERROR HERE
upper_band_bb = mid_line_bb + num_dev_up * sDev[0] # <-- ERROR HERE


What I’ve Tried:

1. Wrapping sDev[0] with MutSeriesF.new(), but that caused another issue.
2. Using sDev.value_or(0) (which doesn’t seem to exist in Indie v4).
3. Looking for an explicit type conversion function in Indie’s documentation.

I assume the issue is that mid_line_bb is a Series[float], while sDev[0] is a single float. How should I properly handle this type of mismatch in Indie?

Continue reading...