Blame for helper/data_merger.py

# helpers/data_merger.py

def merge_acq_perf(
    acq_df,
    perf_df
):

    cols_to_merge = [
        "account_id",
        "booking_vintage",
        "sourcing_channel",
        "fico_band",
        "city_tier",
        "occupation_type",
        "credit_limit"
    ]

    merged_df = perf_df.merge(
        acq_df[cols_to_merge],
        on="account_id",
        how="left"
    )

    return merged_df