Chart

from aspose.cells_foss import ChartType

ws.charts.add(
    chart_type: ChartType,
    upper_left_row: int,
    upper_left_column: int,
    lower_right_row: int,
    lower_right_column: int
) -> Chart

ws.charts.add_bar(upper_left_row, upper_left_column, lower_right_row, lower_right_column) -> Chart

ws.charts.add_line(upper_left_row, upper_left_column, lower_right_row, lower_right_column) -> Chart

ws.charts.add_pie(upper_left_row, upper_left_column, lower_right_row, lower_right_column) -> Chart

ws.charts.add_area(upper_left_row, upper_left_column, lower_right_row, lower_right_column) -> Chart

chart.n_series.add(
    area: str,
    is_vertical: bool = False,
    category_data: str | None = None,
    name: str | None = None,
    chart_type: ChartType | None = None
) -> ChartSeries

series.add_error_bars(
    direction='y',
    bar_type='both',
    val_type='fixedVal',
    val=1.0,
    no_end_cap=False
) -> ChartErrorBars

from aspose.cells_foss import Workbook, ChartType

wb = Workbook()
ws = wb.worksheets[0]
ws.name = "Revenue"

# Write headers and data
headers = ["Month", "Product A", "Product B"]
data = [
    ["Jan", 12000, 9500],
    ["Feb", 14500, 11000],
    ["Mar", 13200, 12800],
    ["Apr", 15800, 14100],
]
for col, h in enumerate(headers):
    ws.cells[0][col].put_value(h)
for row, row_data in enumerate(data, start=1):
    for col, val in enumerate(row_data):
        ws.cells[row][col].put_value(val)

# Add a bar chart covering rows 6-20, columns 0-6
chart = ws.charts.add_bar(6, 0, 20, 6)
chart.title = "Monthly Revenue by Product"
chart.bar_direction = "col"   # vertical (column chart)
chart.grouping = "clustered"

# Series: Product A and Product B
chart.n_series.add("Revenue!B2:B5", is_vertical=True, category_data="Revenue!A2:A5", name="Product A")
chart.n_series.add("Revenue!C2:C5", is_vertical=True, category_data="Revenue!A2:A5", name="Product B")

chart.show_legend = True
chart.legend_position = "bottom"

wb.save("revenue_chart.xlsx")