Python: What is Django caching and how to implement it?

1from django.core.cache import cache
2from django.views.decorators.cache import cache_page
3
4# Simple cache
5cache.set("my_key", "my_value", timeout=300)  # 5 minutes
6value = cache.get("my_key")
7
8# Cache in view
9@cache_page(60 * 15)  # 15 minutes
10def product_list(request):
11    products = Product.objects.all()
12    return render(request, "products/list.html", {"products": products})
13
14# Cache query results
15def get_products():
16    cache_key = "all_products"
17    products = cache.get(cache_key)
18
19    if products is None:
20        products = list(Product.objects.all())
21        cache.set(cache_key, products, 300)
22
23    return products
24
25# Low-level cache API
26cache.add("new_key", "value")  # Only if not exists
27cache.delete("my_key")
28cache.clear()  # Clear all
29
30# Cache template fragment
31{% load cache %}
32{% cache 500 sidebar %}
33    <div>Sidebar content</div>
34{% endcache %}
35
36# settings.py
37CACHES = {
38    "default": {
39        "BACKEND": "django_redis.cache.RedisCache",
40        "LOCATION": "redis://127.0.0.1:6379/1",
41    }
42}