[Python] Why does sys.getrefcount() returns a huge number in circular reference?

I am trying to understand why reference counting technique of garbage collection cannot handle circular references. So I used this code to verify that the reference count doesn't go to zero.

import sys

# Function to count references to an object in the program
def count_references(obj):
return sys.getrefcount(obj) - 1


# Example objects
l = []
l.append(l)

l = None

# Count references before deleting any reference
print("References to 'l' before deletion:", count_references(l))


this was the output

References to 'l' before deletion: 4413


I would be grateful if someone could explain the reference between these large numbers.

Thanks in advance.

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