3ab0e54a3ce88c7018a34192461dd47e5867d357,atlas/tables.py,,col_split,#Any#Any#Any#,48

Before Change

        for value in presplit.split(sep):
            indexes.append(i)
            new_values.append(value)
    new_df = df.iloc[indexes, :].copy()
    new_df[column] = new_values
    return new_df

After Change

    if not cols:
        return df

    col_series = []
    for c in cols:
        col_series.append(df[c].str.split(sep, expand=True).stack().str.strip().reset_index(level=1, drop=True))
    temp_df = pd.concat(col_series, axis=1, keys=cols)
    return df.drop(cols, axis=1).join(temp_df).reset_index(drop=True)

Instances