Create an `ItemList` in `path` from the inputs in the `cols` of `path/csv_name`

def from_csv(cls, path:PathOrStr, csv_name:str, cols:IntsOrStrs=0, delimiter:str=None, header:str='infer',
                 processor:PreProcessors=None, **kwargs)->'ItemList':
        """Create an `ItemList` in `path` from the inputs in the `cols` of `path/csv_name`"""
        df = pd.read_csv(Path(path)/csv_name, delimiter=delimiter, header=header)
        return cls.from_df(df, path=path, cols=cols, processor=processor, **kwargs)