CSV export bytes representation of string

[proofit404]

• Django Export Action version: django-export-action==0.1.1
• Django version: django==1.11.9
• Python version: 3.6.5
• Operating System: debian stretch (official python docker image)

Description

When I trying to export char field of the model into CSV format I got repr() of the string encoded to bytes instead of the string itself.

b'auth_token__key'
b'5e36616a85ff284433b8e3acb9f919513ac2a90a'
b'ad31300cd28ce281b9ea677c8ffb5e437f697134'
b'7e48a77e8261e115485807f45aab3edd5b47a7e7'

But instead of this, I expect the string value itself.

auth_token__key
5e36616a85ff284433b8e3acb9f919513ac2a90a
ad31300cd28ce281b9ea677c8ffb5e437f697134
7e48a77e8261e115485807f45aab3edd5b47a7e7

What I Did

I trace execution to the export_action.report.list_to_csv_response function. It contains this line

cw.writerow([force_text(s).encode(response.charset) for s in row])

If I remove the encode method call, export works as expected.

def list_to_csv_response(data, title="report", header=None, widths=None):
    """ Make 2D list into a csv response for download data.
    """
    response = HttpResponse(content_type="text/csv; charset=UTF-8")
    cw = csv.writer(response)
    for row in chain([header] if header else [], data):
        cw.writerow([force_text(s) for s in row])
    return response

Maybe this is Python 2 & 3 compatibility issue. I can guess that on Python 2 CSV writer expect str instead of Unicode. And on Python 3 it expects str instead of bytes.

Please, let me know if I can help somehow to resolve it.

Regards, Artem.