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Chapter 9: Mappings & Sets (Further Resources)¶

Here, we list some conference talks that go into great detail regarding the workings of the dict type.

How dict objects work¶

Brandon Rhodes explains in great detail in his PyCon 2010 & 2017 talks how dictionaries work "under the hood."

History of the dict Type¶

The dict type's order has been worked on with many PEPs in recent years:

• PEP 412 : Key-Sharing Dictionary
• PEP 468 : Preserving the order of **kwargs in a function
• PEP 520 : Preserving Class Attribute Definition Order

Raymond Hettinger, a Python core developer and one of the greatest Python teachers in the world, summaries the history of the dict type in his PyCon 2017 talk.