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.
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 from xlwt import easyxf # http://pypi.python.org/pypi/xlwt 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])