nonetype object has no attribute dpi nonetype object has no attribute dpi attributeerror nonetype object attributeerror nonetype object opencv resolving nonetype errors attributeerror nonetype object has solution exeption nonetype object has attributeerror nonetype object has mne viz plot raw psd raw not work mne viz plot raw psd raw not work attributeerror nonetype object nonetype object has no attribute csdn nonetype object has no attribute span opencv nonetype object lacking shape attributeerror nonetype object has no attribute shape nonetype object has no attribute name attributeerror nonetype object attributeerror nonetype object dict object has no attribute append nonetype object has no attribute keys solved attributeerror module object attributeerror nonetype object has attributeerror nonetype object has opencv nonetype object lacking shape python attributeerror what is it and attributeerror nonetype object has nonetype object has no attribute copy