scrapy-saving-data.py

# Create a new Category to hold the scraped info. Also,
# prepare it for holding its brands.
category = items.Category(number="...", name="...", url="...", brands=[])

# Save the category into the tree structure.
self.sports["categories"].append(category)

# Create a request for the Category's page, which
# will list all its Brands. 
# Pass the Category Item in the meta dict.
request = scrapy.Request(category["url"], callback=self.parse_category_page)
request.meta["category"] = category
yield request