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I am unable to find examples where xlwt is used to write into existing files. I have a existing xls file that I need to write to. When I use xlrd to read the file, I cant seem to figure out how to transform the "Book" type returned into a xlwt.Workbook. I would appreciate if someone can point me to an example.
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Using xlwt module, one can perform multiple operations on spreadsheet. For example, writing or modifying the data can be done in Python. Also, the user might have to go through various sheets and retrieve data based on some criteria or modify some rows and columns and do a lot of work.
2019 update: xlwt doesn't support xlsx Format. XlsxWriter is 100% compatible with xlsx, well-maintained and has a good reputation. For reading xlsx files, you can use xlrd .
Read Excel File in PythonThe command need to be installed is xlrd module. xlrd module is used to extract data from a spreadsheet. After writing the above code (Read Excel File in Python), Ones you will print then the output will appear as a “ Name ”. Here, row 0 and column 0 data is extracted from the spreadsheet.
There are two methods on the Worksheet class to do this, write_merge and merge . merge takes existing cells and merges them, while write_merge writes a label (just like write ) and then does the same stuff merge does. Both take the cells to merge as r1, r2, c1, c2 , and accept an optional style parameter.
Here's some sample code I used recently to do just that.
It opens a workbook, goes down the rows, if a condition is met it writes some data in the row. Finally it saves the modified file.
from xlutils.copy import copy # http://pypi.python.org/pypi/xlutils from xlrd import open_workbook # http://pypi.python.org/pypi/xlrd START_ROW = 297 # 0 based (subtract 1 from excel row number) col_age_november = 1 col_summer1 = 2 col_fall1 = 3 rb = open_workbook(file_path,formatting_info=True) r_sheet = rb.sheet_by_index(0) # read only copy to introspect the file wb = copy(rb) # a writable copy (I can't read values out of this, only write to it) w_sheet = wb.get_sheet(0) # the sheet to write to within the writable copy for row_index in range(START_ROW, r_sheet.nrows): age_nov = r_sheet.cell(row_index, col_age_november).value if age_nov == 3: #If 3, then Combo I 3-4 year old for both summer1 and fall1 w_sheet.write(row_index, col_summer1, 'Combo I 3-4 year old') w_sheet.write(row_index, col_fall1, 'Combo I 3-4 year old') wb.save(file_path + '.out' + os.path.splitext(file_path)[-1]) If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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