openpyxl python - writing csv to excel gives 'number formatted as text'

Question

I have written a code to import a .csv file (containing numbers) into an excel file through openpyxl. It works, however, all the cells have written the numbers to the excel

Answer 1

This is the first google result, and I spent more time than I would like to admit working on this. I hope it helps someone in the future.

def csvtoxlsx(csv_name, xlsx_name, directory, floats):
    """
    A function to convert a CSV file to XLSX so it can be used by openpyxl.
    csvname = file name of csv you want to convert (include .csv)
    xlsx_name = name you want to name the xlsx file (include .xlsx)
    cwd = directory to find csv file (can pass os.getcwd())
    floats = A list of column indexes in which floats appear
    """

    os.chdir(directory)

    f = open(csv_name, 'rt')
    csv.register_dialect('commas', delimiter=',')
    reader = csv.reader(f, dialect='commas')
    wb = Workbook()
    dest_filename = xlsx_name
    ws = wb.worksheets[0]
    ws.title = xlsx_name[:-5]

    for row_index, row in enumerate(reader):
        for column_index, cell in enumerate(row):

            column_letter = get_column_letter((column_index + 1))

            if column_index in floats:
                s = cell
                #Handles heading row or non floats
                try:
                    s = float(s)
                    ws[('%s%s'%(column_letter, (row_index + 1)))].value = s

                except ValueError:
                    ws[('%s%s'%(column_letter, (row_index + 1)))].value = s

            elif column_index not in floats:
                #Handles openpyxl 'illigal chars'
                try:
                    ws[('%s%s'%(column_letter, (row_index + 1)))].value = cell

                except:
                    ws[('%s%s'%(column_letter, (row_index + 1)))].value = 'illigal char'



    wb.save(filename = dest_filename)