Return the user's information in a json object

def userinfo_json(request, user_id):
    """
    Return the user's information in a json object
    """
    data = {'first_name': '',
            'last_name': '',
            'email': '',
            'slug': '',
            'bio': '',
            'phone': '',
            'is_active': False}

    try:
        member = StaffMember.objects.get(pk=user_id)
        for key in data.keys():
            if hasattr(member, key):
                data[key] = getattr(member, key, '')

    except StaffMember.DoesNotExist:
        pass

    return HttpResponse(json.dumps(data),
                        mimetype='application/json')