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Title[redir]:
PEP 557 – Data Classes | peps.python.org
Description:
This PEP describes an addition to the standard library called Data Classes. Although they use a very different mechanism, Data Classes can be thought of as “mutable namedtuples with defaults”. Because Data Classes use normal class definition syntax, y...
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Keywords {🔍}
class, fields, data, field, default, classes, dataclass, type, init, def, int, method, return, generated, hash, defined, pep, values, function, postinit, object, decorator, instance, true, discussion, methods, parameters, called, python, mutable, provided, support, order, repr, code, instances, false, initfalse, slots, add, functions, initonly, list, variables, float, selfunitprice, selfquantityonhand, selfname, attrs, set,
Topics {✒️}
/python/peps/blob/main/peps/pep-0557 /recipes/576586-dot-style-nested-lookups discussion python-ideas discussion org/pipermail/python-ideas/2017 python-dev message table python-ideas discussion post-init processing default factory functions rejected ideas section module-level method module-level fields module-level replace mutable default values immutable python objects post-init function __post_init__ class author post-init parameters asdict init=false fields work python-ideas [9] module named dataclasses handles init=false fields handles instance copying �normal” python classes support similar syntax default factory function post-process classes factory function dict_factory factory function tuple_factory 02-jun-2017 python-version support combining fields normal python syntax /python-attrs/attrs describe data classes main design goal python class features org/3/reference/datamodel default values documented support instance initialization automatically setting __slots__ post-init parameters david beazley id-based hashing tiny performance penalty alternate classmethod constructors undesirable side effects guido van rossum dictionary-based-dat/ generated functions initializing field values astuple function names
Questions {❓}
- NamedTuple?
- So, why is this PEP needed?
- Where is it not appropriate to use Data Classes?
- Why not just use attrs?
- Why not just use namedtuple?
- Com/watch?
- Why not just attrs?
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