Example: Polars Excel dataframe positioning

##############################################################################
#
# An example of positioning dataframes in a worksheet using Polars and
# XlsxWriter.
#
# SPDX-License-Identifier: BSD-2-Clause
# Copyright 2013-2023, John McNamara, jmcnamara@cpan.org
#

import xlsxwriter
import polars as pl

# Create some Polars dataframes from some data.
df1 = pl.DataFrame({"Data": [11, 12, 13, 14]})
df2 = pl.DataFrame({"Data": [21, 22, 23, 24]})
df3 = pl.DataFrame({"Data": [31, 32, 33, 34]})
df4 = pl.DataFrame({"Data": [41, 42, 43, 44]})

with xlsxwriter.Workbook("polars_positioning.xlsx") as workbook:
    # Write the dataframe to the default worksheet and position: Sheet1!A1.
    df1.write_excel(workbook=workbook)

    # Write the dataframe using a cell string position.
    df2.write_excel(workbook=workbook, worksheet="Sheet1", position="C1")

    # Write the dataframe using a (row, col) tuple position.
    df3.write_excel(workbook=workbook, worksheet="Sheet1", position=(6, 0))

    # Write the dataframe without the header.
    df4.write_excel(
        workbook=workbook, worksheet="Sheet1", position="C8", has_header=False
    )