Object has no attribute groups. Object has no attribute. attributeerror python что это. 'nonetype' object has no attribute 'append'. attributeerror: 'nonetype' object has no attribute 'predict'.

Object has no attribute groups. Object has no attribute. attributeerror python что это. 'nonetype' object has no attribute 'append'. attributeerror: 'nonetype' object has no attribute 'predict'.
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