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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def read_column(self, col, **keys):
 """ Read the specified column Alternatively, you can use slice notation fits=fitsio.FITS(filename) fits[ext][colname][:] fits[ext][colname][2:5] fits[ext][colname][200:235:2] fits[ext][colname][rows] Note, if reading multiple columns, it is more efficient to use read(columns=) or slice notation with a list of column names. parameters col: string/int, required The column name or number. rows: optional An optional set of row numbers to read. vstorage: string, optional Over-ride the default method to store variable length columns. Can be 'fixed' or 'object'. See docs on fitsio.FITS for details. """


        res = self.read_columns([col], **keys)
        colname = res.dtype.names[0]
        data = res[colname]

        self._maybe_trim_strings(data, **keys)
        return data