Pandas: save data to open workbook
I have an open workbook with data written to. How do I add sheets to record the content of a frame?
import xlsxwriter
import pandas as pd
workbook = xlsxwriter.Workbook('test.xlsx')
sheet1 = workbook.add_worksheet(name='sheet1')
sheet1.write(0, 0, 'test')
df = pd.DataFrame({'a': [1, 2, 3, 4], 'b': ['aa', 'bb', 'cc', 'dd']})
# write df somehow to next sheet. I usually use df.to_excel(filename, engine='xlsxwriter'), but this will create a new file
workbook.close()
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As you understood in your comments, you cannot pass the XlsxWriter pandas workbook object to_excel()
.
As a workaround, you can create a worksheet with an empty dataframe and then access XlsxWriter objects and worksheet pages. Then you can add additional sheets through the pandas interface.
Here's a small working example based on your code:
import pandas as pd
# Create an pandas excel writer based on xlsxwriter.
writer = pd.ExcelWriter('test.xlsx', engine='xlsxwriter')
# Create a worksheet with an empty dataframe so the sheet is empty.
df = pd.DataFrame()
df.to_excel(writer, sheet_name='Sheet1')
# Access the underlying xlsxwriter worksheet and write to it.
workbook = writer.book
worksheet = writer.sheets['Sheet1']
worksheet.write(0, 0, 'test')
# Create another dataframe with data.
df = pd.DataFrame({'a': [1, 2, 3, 4],
'b': ['aa', 'bb', 'cc', 'dd']})
# Write the dataframe to another worksheet.
df.to_excel(writer, sheet_name='Sheet2')
writer.save()
See also Working with Python pandas and XlsxWriter .
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