KeyError: "Column 'name' not in data"

[nerdyckc]

any idea why i keep getting this error?

---------------------------------------------------------------------------
KeyError                                  Traceback (most recent call last)
<ipython-input-54-9b8afa777b14> in <module>
     20               cash=10000, commission=.002)
     21 
---> 22 bt.run()
     23 bt.plot()

~/miniconda3/lib/python3.7/site-packages/backtesting/backtesting.py in run(self, **kwargs)
    681         strategy._set_params(**kwargs)
    682 
--> 683         strategy.init()
    684         indicator_attrs = {attr: indicator
    685                            for attr, indicator in strategy.__dict__.items()

<ipython-input-54-9b8afa777b14> in init(self)
      7     def init(self):
      8         data_df = self.data
----> 9         self.supertrend = self.I(ST_numpy_wrapper, data_df, ATR_factor, period)
     10 
     11     def next(self):

~/miniconda3/lib/python3.7/site-packages/backtesting/backtesting.py in I(self, func, name, plot, overlay, color, scatter, *args, **kwargs)
    119         """
    120         if name is None:
--> 121             params = ','.join(filter(None, map(_as_str, chain(args, kwargs.values()))))
    122             func_name = func.__name__.replace('<lambda>', 'λ')
    123             name = ('{}({})' if params else '{}').format(func_name, params)

~/miniconda3/lib/python3.7/site-packages/backtesting/_util.py in _as_str(value)
      9     if isinstance(value, (Number, str)):
     10         return str(value)
---> 11     name = str(getattr(value, 'name', '') or '')
     12     if callable(value):
     13         name = value.__name__.replace('<lambda>', '')

~/miniconda3/lib/python3.7/site-packages/backtesting/_util.py in __getattr__(self, item)
     96             return self.__get_array(item)
     97         except KeyError:
---> 98             raise KeyError("Column '{}' not in data".format(item)) from None
     99 
    100     def _set_length(self, i):

KeyError: "Column 'name' not in data"

[kernc]

You see the error because you pass data_df to your function:

self.supertrend = self.I(ST_numpy_wrapper, data_df, ATR_factor, period)

and data_df does not have either a column named "name" nor a .name attribute which only series have (note, data_df is not really a df, it just acts like one somewhat).

I'll look into supporting that case.

For the time being, the workaround is to pass individual series:

self.supertrend = self.I(ST_numpy_wrapper, data_df.High, data_df.Low, data_df.Close, ATR_factor, period)

[nerdyckc]

Thanks a lot for your swift reply. I'll tweak my code accordingly 🙏