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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 _convert_strls(self, data):
 """Convert columns to StrLs if either very large or in the convert_strl variable"""

        convert_cols = [
            col for i, col in enumerate(data)
            if self.typlist[i] == 32768 or col in self._convert_strl]

        if convert_cols:
            ssw = StataStrLWriter(data, convert_cols)
            tab, new_data = ssw.generate_table()
            data = new_data
            self._strl_blob = ssw.generate_blob(tab)
        return data