Revise paste d6b6a8072e7bb

# ==============================  file 'xlsx_group_parser.py'  ==============================
from openpyxl import load_workbook
from posts.models import Group

def XLSXGroupParser(file):
    wb = load_workbook(file)
    ws = wb.active
    rows = ws.values
    headlines = next(rows)
    index_of_headline = {'title': headlines.index('title'),
                         'slug': headlines.index('slug'),
                         'description': headlines.index('slug')}
    groups = []
    for row in rows:
        group = Group(title=row[index_of_headline['title']],
                      slug=row[index_of_headline['slug']],
                      description=row[index_of_headline['description']])
        if (not group.title or group.title.isspace() or
                not group.slug or group.slug.isspace()):
            continue
        groups.append(group)
    return groups

# ==============================  file 'xlsx_group_import.py'  ==============================
from django.core.management.base import BaseCommand
from posts.parsers.xlsx_group_parser import XLSXGroupParser

class Command(BaseCommand):
    help = 'Import groups from xlsx file'

def add_arguments(self, parser):
        parser.add_argument('file', type=str)

def handle(self, *args, **options):
        file_path = options['file']
        groups = XLSXGroupParser(file_path)
        for group in groups:
            group.save()
            self.stdout.write(f'Группа {group.title} сохранена')