This is how you export a csv file and get the browser to recognize that its a csv file and popups the download window with web.py. Lets say we have a database with a table called users and you want to create a csv file that contains all the users with their names and id’s here is how you do it.
1 class export:
2 def GET(self):
3 i = web.input()
6 users = web.select(’users’, vars=locals())
8 csv = 
10 for user in users:
11 row = 
21 web.header(’Content-disposition’, ‘attachment; filename=export.csv’)
22 print “”.join(csv)
I export the csv file in a GET method of a class called export which i map in the urls list to ‘/export’,‘export’
A quick breakdown, do a database query and iterate over the IterBetter object create a row and appending a comma seperated string to the csv list. Then at the end you send the appropirate HTTP headers , the first telling the type of the file and the second setting the filename and extension.
Anyway you can download this code from http://bulkanix.pastebin.com/f1f567ea0