Namedtuple

Understanding namedtuple requires examining multiple perspectives and considerations. types - What are "named tuples" in Python? Named tuples are basically easy-to-create, lightweight object types. Named tuple instances can be referenced using object-like variable dereferencing or the standard tuple syntax. They can be used similarly to struct or other common record types, except that they are immutable. Building on this, they were added in Python 2.6 and Python 3.0, although there is a recipe for implementation in Python 2.4.

Additionally, python - Type hints in namedtuple - Stack Overflow. ^^ While the keyword-argument syntax mentioned by @MarkedasDuplicate still works (tested on Python 3.10.9 (tags/v3.10.9:1dd9be6)), it was removed from the docstrings in pull 105287 because according to the pull author, "this way of creating NamedTuple s isn't supported by any [known] type checker". namedtuple vs NamedTuple in Python - Stack Overflow. The type generated by subclassing typing.NamedTuple is equivalent to a collections.namedtuple, but with __annotations__, _field_types and _field_defaults attributes added. The generated code will behave the same, for all practical purposes, since nothing in Python currently acts on those typing related attributes (your IDE might use them, though). When and why should I use a namedtuple instead of a dictionary?.

The standard library namedtuple class looks to me like a way to make tuples more like dictionaries. It's important to note that, how do namedtuples compare to dicts? When should we use them?

Do they work with non-hashable types? In this context, data Classes vs typing.NamedTuple primary use cases. PEP-557 introduced data classes into Python standard library, that basically can fill the same role as collections.namedtuple and typing.NamedTuple. And now I'm wondering how to separate the use cases in which namedtuple is still a better solution. Similarly, data classes advantages over NamedTuple Of course, all the credit goes to dataclass if we need: How to check if an object is an instance of a namedtuple?.

This is different from the accepted answer -- this one checks for an instance of a specific namedtuple, while the accepted answer checks for an instance of any namedtuple. Named tuple and default values for optional keyword arguments. In all versions of Python, if you set fewer default values than exist in the namedtuple, the defaults are applied to the rightmost parameters.

This allows you to keep some arguments as required arguments. python - how do I add fields to a namedtuple? It seems I can do that by just referencing it as an attribute (as in namedtuple.attribute = 'foo'), but then it isn't added to the list of fields.

Is there any reason why I shouldn't do it this way if I don't do anything with the fields list? Is there a better way to add a field? Can't set attribute for subclasses of namedtuple - Stack Overflow. It looks like this or this are somewhat related threads, but still haven't figured things out :) I'm trying to create a subclass of namedtuple and provide different initializers so that I can cons...