Requisito previo: crear y escribir en una hoja de Excel
XlsxWriter es una biblioteca de Python con la que se pueden realizar múltiples operaciones en archivos de Excel, como crear, escribir, operaciones aritméticas y trazar gráficos. Veamos cómo trazar diferentes tipos de gráficos circulares utilizando datos en tiempo real.
Los gráficos se componen de al menos una serie de uno o más puntos de datos. Las series en sí mismas se componen de referencias a rangos de celdas.
Para trazar los gráficos en una hoja de Excel, en primer lugar, cree un objeto de gráfico de un tipo de gráfico específico (es decir, gráfico circular, etc.). Después de crear objetos de gráfico, inserte datos en él y, por último, agregue ese objeto de gráfico en el objeto de hoja.
Código n.º 1: Trace el gráfico circular simple.
Para trazar el gráfico circular simple en una hoja de Excel, use add_chart()el método con el argumento de palabra clave tipo ‘pastel’ de un objeto de libro de trabajo.
# import xlsxwriter module
import xlsxwriter
# Workbook() takes one, non-optional, argument
# which is the filename that we want to create.
workbook = xlsxwriter.Workbook('chart_pie.xlsx')
# The workbook object is then used to add new
# worksheet via the add_worksheet() method.
worksheet = workbook.add_worksheet()
# Create a new Format object to formats cells
# in worksheets using add_format() method .
# here we create bold format object .
bold = workbook.add_format({'bold': 1})
# create a data list .
headings = ['Category', 'Values']
data = [
['Apple', 'Cherry', 'Pecan'],
[60, 30, 10],
]
# Write a row of data starting from 'A1'
# with bold format.
worksheet.write_row('A1', headings, bold)
# Write a column of data starting from
# A2, B2, C2 respectively.
worksheet.write_column('A2', data[0])
worksheet.write_column('B2', data[1])
# Create a chart object that can be added
# to a worksheet using add_chart() method.
# here we create a pie chart object .
chart1 = workbook.add_chart({'type': 'pie'})
# Add a data series to a chart
# using add_series method.
# Configure the first series.
#[sheetname, first_row, first_col, last_row, last_col].
chart1.add_series({
'name': 'Pie sales data',
'categories': ['Sheet1', 1, 0, 3, 0],
'values': ['Sheet1', 1, 1, 3, 1],
})
# Add a chart title
chart1.set_title({'name': 'Popular Pie Types'})
# Set an Excel chart style. Colors with white outline and shadow.
chart1.set_style(10)
# Insert the chart into the worksheet(with an offset).
# the top-left corner of a chart is anchored to cell C2.
worksheet.insert_chart('C2', chart1, {'x_offset': 25, 'y_offset': 10})
# Finally, close the Excel file
# via the close() method.
workbook.close()
Salida: 
Código #2: Trace un gráfico circular con colores de segmento definidos por el usuario.
Para trazar el gráfico circular con colores de segmento definidos por el usuario en una hoja de Excel, use el add_series()método con argumento de palabra clave de puntos de un objeto de gráfico.
# import xlsxwriter module
import xlsxwriter
# Workbook() takes one, non-optional, argument
# which is the filename that we want to create.
workbook = xlsxwriter.Workbook('chart_pie_colour.xlsx')
# The workbook object is then used to add new
# worksheet via the add_worksheet() method.
worksheet = workbook.add_worksheet()
# Create a new Format object to formats cells
# in worksheets using add_format() method .
# here we create bold format object .
bold = workbook.add_format({'bold': 1})
# create a data list .
headings = ['Category', 'Values']
data = [
['Apple', 'Cherry', 'Pecan'],
[60, 30, 10],
]
# Write a row of data starting from 'A1'
# with bold format .
worksheet.write_row('A1', headings, bold)
# Write a column of data starting from
# A2, B2, C2 respectively.
worksheet.write_column('A2', data[0])
worksheet.write_column('B2', data[1])
# Create a chart object that can be added
# to a worksheet using add_chart() method.
# here we create a pie chart object
chart2 = workbook.add_chart({'type': 'pie'})
# Add a data series to a chart
# using add_series method.
# Configure the first series.
# = Sheet1 !$A$1 is equivalent to ['Sheet1', 0, 0].
chart2.add_series({
'name': 'Pie sales data',
'categories': '= Sheet1 !$A$2:$A$4',
'values': '= Sheet1 !$B$2:$B$4',
'points': [
{'fill': {'color': '# 5ABA10'}},
{'fill': {'color': '# FE110E'}},
{'fill': {'color': '# CA5C05'}},
],
})
# Add a chart title.
chart2.set_title({'name': 'Pie Chart with user defined colors'})
# Insert the chart into the worksheet (with an offset)
# the top-left corner of a chart is anchored to cell C2.
worksheet.insert_chart('C2', chart2, {'x_offset': 25, 'y_offset': 10})
# Finally, close the Excel file
# via the close() method.
workbook.close()
Salida: 
Código #3: Trace un gráfico circular con rotación de los segmentos.
Para trazar un gráfico circular con rotación de los segmentos en una hoja de Excel, use el método set_rotation() con un argumento de ángulo definido del objeto del gráfico.
# import xlsxwriter module
import xlsxwriter
# Workbook() takes one, non-optional, argument
# which is the filename that we want to create.
workbook = xlsxwriter.Workbook('chart_pie_rotation.xlsx')
# The workbook object is then used to add new
# worksheet via the add_worksheet() method.
worksheet = workbook.add_worksheet()
# Create a new Format object to formats cells
# in worksheets using add_format() method .
# here we create bold format object .
bold = workbook.add_format({'bold': 1})
# create a data list .
headings = ['Category', 'Values']
data = [
['Apple', 'Cherry', 'Pecan'],
[60, 30, 10],
]
# Write a row of data starting from 'A1'
# with bold format .
worksheet.write_row('A1', headings, bold)
# Write a column of data starting from
# A2, B2, C2 respectively.
worksheet.write_column('A2', data[0])
worksheet.write_column('B2', data[1])
# Create a chart object that can be added
# to a worksheet using add_chart() method.
# here we create a pie chart object .
chart3 = workbook.add_chart({'type': 'pie'})
# Add a data series to a chart
# using add_series method.
# Configure the first series.
# = Sheet1 !$A$1 is equivalent to ['Sheet1', 0, 0].
chart3.add_series({
'name': 'Pie sales data',
'categories': '= Sheet1 !$A$2:$A$4',
'values': '= Sheet1 !$B$2:$B$4',
})
# Add a chart title.
chart3.set_title({'name': 'Pie Chart with segment rotation'})
# Change the angle / rotation of the first segment.
chart3.set_rotation(90)
# Insert the chart into the worksheet (with an offset).
# the top-left corner of a chart is anchored to cell C2.
worksheet.insert_chart('C2', chart3, {'x_offset': 25, 'y_offset': 10})
# Finally, close the Excel file
# via the close() method.
workbook.close()
Producción: