无法将我的标头从excel写入python中的另一个excel

Question

I can't get why my code isn't running, I don't know big thing about python but that seems pretty basic, I'm considering the firstRow is an array, am I right? Also, I implement my new excel file while first is not empty (if i clearly understood how to check if it's empty or not).. Thank you

import xlsxwriter
import xlrd

#ouvre l'excel
workbook = xlrd.open_workbook('myExcel.xlsx', on_demand = True)

#utilise le 2nd spreadsheet
worksheet = workbook.sheet_by_index(1)

#recupere la premiere ligne (headers) // a priori un array
firstRow = worksheet.row_values(0)


# Create an new Excel file and add a worksheet.
workbook2 = xlsxwriter.Workbook('demo2.xlsx')
worksheet2 = workbook2.add_worksheet()

number = 0

#pour chaque colonne, l'écrire dans une nouvelle colonne du fichier excel
for first in firstRow:
    while first:
        worksheet2.write(number, 0, first)
        number += 1

workbook2.close()

Answer 1

Examine the loop below:

for first in firstRow:
    while first:
        worksheet2.write(number, 0, first)
        number += 1

We never exit the while first: loop because there is always a first and it is never changed. We first open the loop, for first in firstRow :

1) first is the value of A1 in your workbook

2) Now we loop while first

3) We write first to the cell at number , 0 which is 0, 0

4) Increment number and repeat while first again.

5) Now write first again to the cell at number , 0 which now is 1, 0

6) Increment number and repeat while first again.

You can see how we'll never get out of this loop, your program endlessly writes first into a new cell.

You may want to use:

for first in firstRow:
    worksheet2.write(number, 0, first)
    number += 1