django csv标头和行格式问题

Question

I am trying to create csv download ,but result download gives me in different format

def csv_download(request):
    import csv
    import calendar
    from datetime import *
    from dateutil.relativedelta import relativedelta

    now=datetime.today()
    month = datetime.today().month
    d = calendar.mdays[month]

    # Create the HttpResponse object with the appropriate CSV header.
    response = HttpResponse(mimetype='text/csv')
    response['Content-Disposition'] = 'attachment; filename=somefilename.csv'
    m=Product.objects.filter(product_sellar = 'jhon')
    writer = csv.writer(response)
    writer.writerow(['S.No'])
    writer.writerow(['product_name'])
    writer.writerow(['product_buyer'])
    for i in xrange(1,d):

       writer.writerow(str(i) + "\t")



    for f in m:
         writer.writerow([f.product_name,f.porudct_buyer])

    return response

output of above code :

product_name
1
2
4
5
6
7
8
9
1|10
1|1
1|2
.
.
.
2|7


mgm | x_name
wge | y_name

I am looking out put like this

s.no   porduct_name product_buyser  1     2   3   4   5   6   7   8 9 10 .....27 total
  1   mgm            x_name         2      3      8                                13
  2  wge             y_name                   4       9                            13

can you please help me with above csv download ? if possible can you please tell me how to sum up all the individual user total at end?

Example :

we have selling table in that every day seller info will be inserted

table data looks like

 S.no product_name product_seller sold Date
  1     paint        jhon           5   2011-03-01
  2     paint        simth          6   2011-03-02 

I have created a table where it displays below format and i am trying to create csv download

s.no prod_name   prod_sellar 1-03-2011  2-03-2011   3-03-2011   4-03-2011 total
    1     paint         john       10        15               0               0     25
    2     paint         smith      2          6               2               0     10

Answer 1

Please read the csv module documentation , particularly the writer object API .

You'll notice that the csv.writer object takes a list with elements representing their position in your delimited line. So to get the desired output, you would need to pass in a list like so:

writer = csv.writer(response)
writer.writerow(['S.No', 'product_name', 'product_buyer'] + range(1, d) + ['total'])

This will give you your desired header output.

You might want to explore the csv.DictWriter class if you want to only populate some parts of the row. It's much cleaner. This is how you would do it:

writer = csv.DictWriter(response, 
                        ['S.No', 'product_name', 'product_buyer'] + range(1, d) + ['total'])

Then when your write command would follow as so:

for f in m:
    writer.writerow({'product_name': f.product_name, 'product_buyer': f.product_buyer})