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'NaTType' object has no attribute 'days' - Error in custom factor
Jay Ross
posted

I am trying to create a custom function that subtracts two dates but have been getting this error when converting to days - 'NaTType' object has no attribute 'days' 

class DateRange(CustomFactor):  
   inputs = [morningstar.share_class_reference.ipo_date]  
    window_length = 1  
    dtype = np.dtype('datetime64[ns]')  


    def compute(self, today, assets, out, date):  
        for ii, d in enumerate(date[0,:]):  
            date1 = pd.Timestamp(d, tz='UTC', offset='C')  
            delta = today - date1  
            out[ii] = delta.days

is there a fix? Thanks!

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