2025-08-21 18:59:14 +0300 MSK

Reshape Data: Melt
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Code

import pandas as pd

def meltTable(report: pd.DataFrame) -> pd.DataFrame:
    report = report.melt(
        id_vars=["product"],
        value_vars=["quarter_1", "quarter_2", "quarter_3", "quarter_4"],
        var_name="quarter",
        value_name="sales",
    )
    return report