CODEWITHSUNDEEP
python
user630356
user630356

Reputation: 21

python list boundary

Is there a boundary on list and dictionary in python? if there is, what is the limit?

Upvotes: 2

Views: 266

Answers (3)

jsbueno
jsbueno

Reputation: 110261

Actually, currently hash implementation for inner Python objects use 32 bit hashes --so, at a point close to 2^32 elements on a dictionary (assuming you have memory for that much), you will start to have a lot of collisions, and will have a significant slow down in dictionary usage. But that won't prevent it from working.

(Python devels are looking at making this hash 64 bit in future builds, so this is no longer an issue).

As for absolute limit, there is none - the limiting factor is the available system memory.

Upvotes: 3

MAK
MAK

Reputation: 26586

I think by boundary you mean whether there is an upper bound on the number of elements in a list or dict. Python does not define any limits on them, so they can be as big as the memory available on your machine permits.

Upvotes: 6

Jochen Ritzel
Jochen Ritzel

Reputation: 107608

The amount of memory you have is the limit.

Upvotes: 1

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