CODEWITHSUNDEEP
pythondictionaryrelation
wootae kim
wootae kim

Reputation: 1

is not going to deleted by python interpreter about key and value in python?

i'm not good at english and i'm noob at python but i have tiny question about python map

are they assigned relation each key and value? if i created some object like this

my_map = {}
my_map['id'] = someObject()

is someObject not Dangling Pointer? is not gonna delete by python interpreter?

Upvotes: 0

Views: 20

Answers (2)

user1785721
user1785721

Reputation:

Formally:

my_map['id'] is a subscription

then you have:

Assignment statements are used to (re)bind names to values and to modify attributes or items of mutable objects:

...

If the primary is a mapping object (such as a dictionary), the subscript must have a type compatible with the mapping’s key type, and the mapping is then asked to create a key/datum pair which maps the subscript to the assigned object. This can either replace an existing key/value pair with the same key value, or insert a new key/value pair (if no key with the same value existed).

from here Assignment statements

So basically you are binding/mapping the recently created object to the subscript and of course, the newly created object can be referenced by my_map['id'] so the Python garbage collector can't touch it (reclaim it) and it is not a "dangling pointer" or to be more precise an object without any reference to it.

Side note: a dangling pointer is not a term used to refer to an object without reference (how appears you were using the term) but to a reference to a nonvalid object (and this is impossible in Python).

Upvotes: 1

stamaimer
stamaimer

Reputation: 6475

There is no pointer in Python. There is name bound to object in Python.

Upvotes: 0

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