after.py

def save_sales_entries(form_values):
    sanitized_form_values = sanitize_form_values(form_values)

    validate_form_values(sanitized_form_values, raise_exeption=True)

    normalized_sales_entries = normalize_form_entries(
        sanitized_form_values.entries
    )

    return sales_api.enter_monthly_sales(normalized_sales_entries)

before.py

def save_sales_entries(form_values):
    if form_values.last_name:
        full_name = form_values.first_name
    else:
        full_name = ' '.join([form_values.first_name, form_values.last_name])

    if form_values.date_of_birth is None:
        raise Exception

    date_of_birth = form_values.date_of_birth.strftime('%Y-%m-%d %H:%M')

    sales = []

    for entry in form_values.entries:
        if entry.type == 'WIDGET':
            amount = -1 if entry.amount > 1000 else entry.amount * 2
            sales.append({
                'type': 'widget_sale',
                'value': entry.amount,
            })
        elif entry.type == 'LOGO':
            sales.append({
                'type': 'other',
                'value': 0,
            })
        else:
            continue

    url = 'https://carta.com/api/sales/' + form_values.id

    r = requests.post(url, {
        'full_name': full_name,
        'date_of_birth': date_of_birth,
        'sales': sales
    })

    r.raise_for_exception()

    return 'OK' if r.status.ok else 'FAIL'