def col_values(df, col_name):
_check_cols(df, [col_name])<EOL>if '<STR_LIT:O>' in df[col_name] or pd.np.issubdtype(df[col_name].dtype, str): <EOL><INDENT>return [nom.lower() for nom in df[pd.notnull(df)][col_name] if not pd.isnull(nom)]<EOL><DEDENT>else:<EOL><INDENT>return [nom for nom in df[pd.notnull(df)][col_name] if not pd.isnull(nom)]<EOL><DEDENT>
Return a list of not null values from the `col_name` column of `df`.