queryset2csv.py

import io
import csv

def queryset2csv(qset):
    """Converts a Django queryset to the content of a csv file."""
    out = io.StringIO()
    writer = csv.writer(out, delimiter=';', lineterminator='\n')

    for row in qset:
        writer.writerow([row.field1, row.field2, ...])
    content = out.getvalue()
    out.close()

    return content