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This argument allows to set a custom name for a more meaningful ``repr`` output. This argument is pointless in Python 3 and is therefore deprecated. .. caution:: Refer to `attrs.define` for the rest of the parameters, but note that they can have different defaults. Notably, leaving *on_setattr* as `None` will **not** add any hooks. .. versionadded:: 16.0.0 *slots* .. versionadded:: 16.1.0 *frozen* .. versionadded:: 16.3.0 *str* .. versionadded:: 16.3.0 Support for ``__attrs_post_init__``. .. versionchanged:: 17.1.0 *hash* supports `None` as value which is also the default now. .. versionadded:: 17.3.0 *auto_attribs* .. versionchanged:: 18.1.0 If *these* is passed, no attributes are deleted from the class body. .. versionchanged:: 18.1.0 If *these* is ordered, the order is retained. .. versionadded:: 18.2.0 *weakref_slot* .. deprecated:: 18.2.0 ``__lt__``, ``__le__``, ``__gt__``, and ``__ge__`` now raise a `DeprecationWarning` if the classes compared are subclasses of each other. ``__eq`` and ``__ne__`` never tried to compared subclasses to each other. .. versionchanged:: 19.2.0 ``__lt__``, ``__le__``, ``__gt__``, and ``__ge__`` now do not consider subclasses comparable anymore. .. versionadded:: 18.2.0 *kw_only* .. versionadded:: 18.2.0 *cache_hash* .. versionadded:: 19.1.0 *auto_exc* .. deprecated:: 19.2.0 *cmp* Removal on or after 2021-06-01. .. versionadded:: 19.2.0 *eq* and *order* .. versionadded:: 20.1.0 *auto_detect* .. versionadded:: 20.1.0 *collect_by_mro* .. versionadded:: 20.1.0 *getstate_setstate* .. versionadded:: 20.1.0 *on_setattr* .. versionadded:: 20.3.0 *field_transformer* .. versionchanged:: 21.1.0 ``init=False`` injects ``__attrs_init__`` .. versionchanged:: 21.1.0 Support for ``__attrs_pre_init__`` .. versionchanged:: 21.1.0 *cmp* undeprecated .. versionadded:: 21.3.0 *match_args* .. versionadded:: 22.2.0 *unsafe_hash* as an alias for *hash* (for :pep:`681` compliance). .. deprecated:: 24.1.0 *repr_ns* .. versionchanged:: 24.1.0 Instances are not compared as tuples of attributes anymore, but using a big ``and`` condition. This is faster and has more correct behavior for uncomparable values like `math.nan`. .. versionadded:: 24.1.0 If a class has an *inherited* classmethod called ``__attrs_init_subclass__``, it is executed after the class is created. .. deprecated:: 24.1.0 *hash* is deprecated in favor of *unsafe_hash*. NrzQThe `repr_ns` argument is deprecated and will be removed in or after August 2025.) stacklevelcspt|}duot|t}ot|d}|r |r d}t|t||t|dd | |}t|drD|durL|t|d}|s]|dur]| |sjt|drj| sp|  durdurt|d rd dur d ur durd }t | d us dur|d us|rrd }t |n! dus dur|dur|dur| n rd }t ||t| d r|n |rd}t |trt|ds|tr rt|ds||S)NTrz/Can't freeze a class with a custom __setattr__.)rr)r1rg)rr)rrrrrvFr0zlInvalid value for cache_hash. To use hash caching, hashing must be either explicitly or implicitly enabled.rzFInvalid value for cache_hash. To use hash caching, init must be True.rr)_has_frozen_base_class issubclassrrrBrrrfrirrrrAr{rwrrrrr rr-)r is_frozenrhas_own_setattrrLbuilderr:rrauto_excrreq_rrrr5r6r9 match_argsr>order_r3repr_nsrrPrrrrwraps     zattrs..wrap) warningswarnDeprecationWarningrrErFrGr rH) maybe_clsrrr3r4r5r6rrrrPrr9rrr:r<rrrr>rr unsafe_hashrrrrrrys"\ 4nrycCs |jtuS)zV Check whether *cls* has a frozen ancestor by looking at its __setattr__. )rr)rrrrrs rr func_namec Cs$d|d|jdt|d|jdS)zF Create a "filename" suitable for a function being generated. z. r5zdef __hash__(selfzhash((z))z):z, *zC, _cache_wrapper=__import__('attr._make')._make._CacheHashWrapper):z_cache_wrapper()c s|||ddgD]-}|jr4d|jd}|j|<|d|d|jdq|d|jdq|dd S) z Generate the code for actually computing the hash code. Below this will either be returned directly or used to compute a value which is then cached, depending on the value of cache_hash r,r$_key(self.z), self. N)rr;rr)prefixindentrcmp_nameryclosing_bracesrQ hash_func method_lines type_hashrrappend_hash_computation_lines/s  z8_make_hash_script..append_hash_computation_lineszif self.z is None:zobject.__setattr__(self, '', rself. = z return self.zreturn r)rGr5rrrKr)rryrrtabhash_defrrOrrrrzs>   rzcCs6t||ddd\}}t||t|dd|d|_|S)z% Add a hash method to *cls*. FrxrvrU)rzr\rrvrryrOrQrrr _add_hash\s   rcCs||}|tur tS| S)z^ Check equality and either forward a NotImplemented or return the result negated. )rNotImplemented)rotherresultrrrrjs rrFc Csdd|D}gd}i}|r_|d|D]B}|jr.)zdef __eq__(self, other):z- if other.__class__ is not self.__class__:z return NotImplementedz return (r$rrrz) == z(other.rrz == other.r_z andz )z return Truer)rr;rr)ryrrQrrrOrrrrvs(       rcsVddDfddfdd}fdd}fd d }fd d }||||fS) z9 Create ordering methods for *cls* with *attrs*. cSrr)r<rrrrrrz_make_order..cs tddfddDDS)z& Save us some typing. css$|] \}}|r ||n|VqdSr*r)rrrrrrrs  z6_make_order..attrs_to_tuple..c3s"|] }t|j|jfVqdSr*)rrr=robjrrrs )rGrryrrattrs_to_tuples  z#_make_order..attrs_to_tuplecs |j|jur||kStSz1 Automatically created by attrs. rrrrrrrr z_make_order..__lt__cs |j|jur||kStSrrrrrrrrz_make_order..__le__cs |j|jur||kStSrrrrrrrrz_make_order..__gt__cs |j|jur||kStSrrrrrrrrz_make_order..__ge__r)rryrrrrr)ryrrrs  rcCsB|dur|j}t|\}}t||t|dd|d|_t|_|S)z5 Add equality methods to *cls* with *attrs*. Nrr)rrr\rrrrrrr_add_eqs   rc Cstdd|D}dd|D}t|d<t|d<t|d<g}|D]'\}}}|r+d|nd |d }|tkr;d ||fnd |||f} || q d |} |durTd} n|d} ddddddddddddd| d| ddd g} d!| |fS)"zC Create the source and globs for a __repr__ and return it. css8|]}|jdur|j|jdurtn|j|jfVqdS)FTN)r3rr6rrrrrs z$_make_repr_script..cSs$i|]\}}}|tkr|d|qS)_repr)r3)rrrr$rrrr:sz%_make_repr_script..r r2rrzgetattr(self, "z ", NOTHING)z %s={%s!r}z%s={%s_repr(%s)}rNz1{self.__class__.__qualname__.rsplit(">.", 1)[-1]}z.{self.__class__.__name__}zdef __repr__(self):z try:z: already_repring = _compat.repr_context.already_repringz except AttributeError:z! already_repring = {id(self),}z: _compat.repr_context.already_repring = already_repringz else:z# if id(self) in already_repring:z return '...'z else:z# already_repring.add(id(self))z return f'(z)'z finally:z$ already_repring.remove(id(self))r)rGr r2rr3rr) ryreattr_names_with_reprsrQattribute_fragmentsrrrpaccessorfragment repr_fragmentcls_name_fragmentrrrrrdsN   rdcCs>|dur|j}t||\}}t||t|dd|d|_|S)z% Add a repr method to *cls*. Nr r)rrdr\rr )rreryrOrQrrr _add_reprs  rcCsvt|}|durt|tsd}t|t|dd}|dur9|dur0t|dd}|dur0||_|S|d}t||S)aG Return the tuple of *attrs* attributes for a class. The tuple also allows accessing the fields by their names (see below for examples). Args: cls (type): Class to introspect. Raises: TypeError: If *cls* is not a class. attrs.exceptions.NotAnAttrsClassError: If *cls* is not an *attrs* class. Returns: tuple (with name accessors) of `attrs.Attribute` .. versionchanged:: 16.2.0 Returned tuple allows accessing the fields by name. .. versionchanged:: 23.1.0 Add support for generic classes. NPassed object must be a class.r! is not an attrs-decorated class.)rrEr/rArrr)r generic_baserLryrrrr,s   rcCsJt|ts d}t|t|dd}|dur|d}t|dd|DS)a Return an ordered dictionary of *attrs* attributes for a class, whose keys are the attribute names. Args: cls (type): Class to introspect. Raises: TypeError: If *cls* is not a class. attrs.exceptions.NotAnAttrsClassError: If *cls* is not an *attrs* class. Returns: dict[str, attrs.Attribute]: Dict of attribute name to definition .. versionadded:: 18.1.0 rrNrcSsi|]}|j|qSrrrrrrr:tr!zfields_dict..)rEr/rArr)rrLryrrr fields_dictZs   rcCsDtjdurdSt|jD]}|j}|dur|||t||jq dS)z Validate all attributes on *inst* that have a validator. Leaves all exceptions through. Args: inst: Instance of a class with *attrs* attributes. FN)r _run_validatorsrrr2rr)rrr9rrrr ws r cCs||}|o d|jvS)z> Check if the attribute name comes from a slot class. r>)rr)a_namerrrrr _is_slot_attrs rtuple[str, dict, dict]c  Cs| duo| tju} |r| rd} t| |p|}g}i}|D]1}|js(|jtur(q|||||j<|jdurD|durAd} t| d}q| rN|jtjurNd}qt ||||||||| || | r_dnd \}}}|j t j vru| t j |j j| t|d|rtj|d<|||fS)Nz$Frozen classes can't use on_setattr.Trr)r attr_dictr)r rrBr6r1rrrr>_attrs_to_init_scriptr$sysmodulesr#rrr)rrypre_initpre_init_has_args post_initrrrrrcls_on_setattrr~has_cls_on_setattrrLneeds_cached_setattrfiltered_attrsrrrOrQrrrrrsR       rrv value_varhas_on_setattrcCsd|d|dS)zJ Use the cached object.setattr to set *attr_name* to *value_var*. _setattr('rrrrvrrrrr_setattrrnrr7 ConvertercCsd|d|||dS)zk Use the cached object.setattr to set *attr_name* to *value_var*, but run its converter first. rrr)_fmt_converter_callrvrrr7rrr_setattr_with_convertersrrcCs |rt||dSd|d|S)zo Unless *attr_name* has an on_setattr hook, use normal assignment. 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TrrvrPrrrrVcs&t|r t|||Sd|d|SN _inst_dict['z'] = )rrrrrr fmt_setters  z&_determine_setters..fmt_setterr7rcs4|st|rt||||Sd|d|||Sr)rrrrrrrfmt_setter_with_converters z5_determine_setters..fmt_setter_with_converter)z_inst_dict = self.__dict__NrvrPrrPrrrVrP rvrPrrPrrr7rrVrP)rrrr)rrrrrrrr_determine_setterss  r"r is_slotted call_pre_initr call_post_initdoes_cache_hashrrr  method_namec $ Cs|rdgng} | r| dt|||\} }}| | g}g}g}i}ddi}|D]}|jr5|||j}|jdupD|jtjuoD| }|j}t |j t }|rV|j j rVdnd}|j durit |j tsit|j }n|j }|jdur|rt|jf}|dur| |||d|d |||j |||j<n| |||d|d ||j j||<n|dur| ||d |d |||j |||j<n| ||d |d |n|j tur|s|d |d }|jr||n|||dur| ||||||j |||j<n| ||||n|r|d }|jr-||n||| d|dt|jf}|durs| d|||||| d| d|||d|d |||j |||j<n!| d||||| d| d|||d|d ||j j||<n1|jr||n|||dur| ||||||j |||j<n | |||||jdur|jdur|dur|j||<q*|dur|jr|j||<q*|r't|d<| d|D]&}d|j}d|j}| d|d|d|jd |j||<|||<q|r/| d|rQ|rF|r?dtd}n dtd}ndtd}| ||rgd d!d"|D} | d#| d d$|}|}!|r||rwd$ndd%d$|7}d$d&d'd(d"|DD}"|!|!rd$nd7}!|!|"7}!|r|rd)|!d | d*<d+}#d,| d|d-| r|#| nd.d/||fS)0z Return a script of an initializer for *attrs*, a dict of globals, and annotations for the initializer. The globals are required by the generated script. zself.__attrs_pre_init__()z$_setattr = _cached_setattr_get(self)rVNrrNFrrz attr_dict['z '].defaultz =attr_dict['z=NOTHINGzif z is not NOTHING:rzelse:Tr z#if _config._run_validators is True:__attr_validator___attr_z(self, z, self.zself.__attrs_post_init__()rz', None)rz '] = Nonerz = Nonercss"|] }|jrd|jVqdS)rN)r6rrrrrr s z(_attrs_to_init_script..zBaseException.__init__(self, rz*, cSsg|] }|d|qS)=r)r kw_arg_namerrrr s z)_attrs_to_init_script..css|] }|ddVqdS)r*rN)split)rkwarrrr szself.__attrs_pre_init__(rz zdef z): passr)rr"rr2rr>r rr?rEr1rD takes_selfr7rr6_INIT_FACTORY_PAT_get_global_namerKrr9r/_first_param_typer rKr)$ryrr#r$r r%r&rrrr r'r extra_linesrrr kw_only_argsattrs_to_validatenames_for_globalsrrrvrarg_name has_factory maybe_selfr7init_factory_nameargval_nameinit_hash_cachevals pre_init_argspre_init_kw_only_argsNLrrrr.sl                                       "  rrcCs |dS)z The default __init__ parameter name for a field. This performs private-name adjustment via leading-unscore stripping, and is the default value of Attribute.alias if not provided. r$)lstriprrrrr2 s rc@sjeZdZdZdZ          dddZddZeddd dZddZ ddZ ddZ ddZ dS)ra *Read-only* representation of an attribute. .. warning:: You should never instantiate this class yourself. The class has *all* arguments of `attr.ib` (except for ``factory`` which is only syntactic sugar for ``default=Factory(...)`` plus the following: - ``name`` (`str`): The name of the attribute. - ``alias`` (`str`): The __init__ parameter name of the attribute, after any explicit overrides and default private-attribute-name handling. - ``inherited`` (`bool`): Whether or not that attribute has been inherited from a base class. - ``eq_key`` and ``order_key`` (`typing.Callable` or `None`): The callables that are used for comparing and ordering objects by this attribute, respectively. These are set by passing a callable to `attr.ib`'s ``eq``, ``order``, or ``cmp`` arguments. 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Running into is most likely the result of a bug like a forgotten `@attr.s` decorator. )rGrHr?r7rr:r;r5r6r9r8r>r<r=r3r/ccs:|]}t|t|tdddddddddddddVqdS)NTFrr?r1r2r3r4r5r6r9r:r;r<r=rr>)rrrr=rrrr= s* z_CountingAttr.) rrGr3r:r<r5r6r>r?r8NTFrRrcCsttjd7_tj|_||_||_||_||_| |_| |_| |_ ||_ ||_ ||_ ||_ | |_| |_||_||_dSr)rJ cls_counterrrGrHr7r3r:r;r<r=r5r6r8r/r9r>r?)rr1r2r3r4r5r6r7r8r/r9r:r;r<r=r>r?rrrro s" z_CountingAttr.__init__cCs&|jdur ||_|St|j||_|S)z Decorator that adds *meth* to the list of validators. Returns *meth* unchanged. .. versionadded:: 17.1.0 N)rHrIrrrrrr2 s z_CountingAttr.validatorcCs |jturtt|dd|_|S)z Decorator that allows to set the default for an attribute. Returns *meth* unchanged. Raises: DefaultAlreadySetError: If default has been set before. .. versionadded:: 17.1.0 T)r/)rGrrrDrTrrrr1 s z_CountingAttr.default) r#r$r%r&r>rGrrrSrr2r1rrrrrJ! s<1% rJc@s.eZdZdZdZd ddZddZdd Zd S) rDa Stores a factory callable. If passed as the default value to `attrs.field`, the factory is used to generate a new value. Args: factory (typing.Callable): A callable that takes either none or exactly one mandatory positional argument depending on *takes_self*. takes_self (bool): Pass the partially initialized instance that is being initialized as a positional argument. .. versionadded:: 17.1.0 *takes_self* rKr/FcCs||_||_dSr*rU)rrKr/rrrr s zFactory.__init__crL)rMc3s|]}t|VqdSr*r<r=rrrr z'Factory.__getstate__..rNrrrrr szFactory.__getstate__cCs&t|j|D] \}}t|||qdSrO)ror>r4)rrprrrrrr szFactory.__setstate__N)F)r#r$r%r&r>rrrrrrrrD s   rDcC(g|]}t|tddddddddd qSNTF) rr1r2r3r4r:r<r5r6rrrr=rrrr  c@sLeZdZdZdZdddddZedd d Zdd dZddZ ddZ dS)rae Stores a converter callable. Allows for the wrapped converter to take additional arguments. The arguments are passed in the order they are documented. Args: converter (Callable): A callable that converts the passed value. takes_self (bool): Pass the partially initialized instance that is being initialized as a positional argument. (default: `False`) takes_field (bool): Pass the field definition (an :class:`Attribute`) into the converter as a positional argument. (default: `False`) .. versionadded:: 24.1.0 )__call__r2 _global_namer7 takes_fieldr/Fr/r]cs|_|_|_t|}|_js js fdd_n#jr.js.fdd_njs<jr<fdd_nfdd_|}|durS|jjd<dSdS)Ncs |Sr*r7)rr$__rrrr rz$Converter.__init__..cs ||Sr*r_)rinstancer`rrrr cs ||Sr*r_)rr`rrrrr rbcs|||Sr*r_)rrarrrrr# srV) r7r/r]rget_first_param_typer2r[get_return_typer~)rr7r/r]exrtrrrr s     zConverter.__init__rvrPrVcCs d|S)zh Return the name that a converter for an attribute name *attr_name* would have. __attr_converter_r)rvrrrr1+ s zConverter._get_global_namercCs|js|js||d|dS|jr%|jr%||d|d|dS|jr3||d|dS||d|d|dS)z Return a string that calls the converter for an attribute name *attr_name* and the value in variable named *value_var* according to `self.takes_self` and `self.takes_field`. rrz, self, attr_dict['z'])z, self)z , attr_dict[')r/r]r1)rrvrrrrr3 s  zConverter._fmt_converter_callcCs|j|j|jdS)zx Return a dict containing only converter and takes_self -- the rest gets computed when loading. r7r/r]rhrrrrrD szConverter.__getstate__cCs|jdi|dS)z+ Load instance from state. NrrrPrrrrO szConverter.__setstate__N)rvrPrVrP)rvrPrrPrVrP) r#r$r%r&r>rrPr1rrrrrrrr s    cCrWrXrYr=rrrrV rZrhc  sjtd|}t|tr|}nt|ttfrdd|D}nd}t||dd}|dd}|dd} i|dur@||durH|d<|durP|d<| durX| d<t ||ifd d } t t ttd jd d | _Wdn1swY|dd} t| |d|dd\|d<|d<tdd|i|| } dd|D| _| S)a A quick way to create a new class called *name* with *attrs*. .. note:: ``make_class()`` is a thin wrapper around `attr.s`, not `attrs.define` which means that it doesn't come with some of the improved defaults. For example, if you want the same ``on_setattr`` behavior as in `attrs.define`, you have to pass the hooks yourself: ``make_class(..., on_setattr=setters.pipe(setters.convert, setters.validate)`` .. warning:: It is *your* duty to ensure that the class name and the attribute names are valid identifiers. ``make_class()`` will *not* validate them for you. Args: name (str): The name for the new class. attrs (list | dict): A list of names or a dictionary of mappings of names to `attr.ib`\ s / `attrs.field`\ s. The order is deduced from the order of the names or attributes inside *attrs*. Otherwise the order of the definition of the attributes is used. bases (tuple[type, ...]): Classes that the new class will subclass. class_body (dict): An optional dictionary of class attributes for the new class. attributes_arguments: Passed unmodified to `attr.s`. Returns: type: A new class with *attrs*. .. versionadded:: 17.1.0 *bases* .. versionchanged:: 18.1.0 If *attrs* is ordered, the order is retained. .. versionchanged:: 23.2.0 *class_body* .. versionchanged:: 25.2.0 Class names can now be unicode. NFKCcSsi|]}|tqSr)rMrrrrr: r!zmake_class..z(attrs argument must be a dict or a list.rNrrcs |Sr*)r#)rerurrr rzmake_class..r r#__main__r4r:r<TrcSs"i|] \}}|jdur||jqSr*)r/r7rrrr: sr) unicodedata normalizerErrFrGrApopr#rC new_classr0r1r2rBr _getframe f_globalsrr$rrrr~) rrybases class_bodyattributes_argumentsrarLr r  user_inittype_r4rrrjr make_classk sP 0       rw)rrc@seZdZdZeZddZdS) _AndValidatorz2 Compose many validators to a single one. cCs|jD]}||||qdSr*) _validators)rrrrr9rrrr[ s z_AndValidator.__call__N)r#r$r%r&rMryr[rrrrrx s rxcGs6g}|D]}|t|tr|jn|gqtt|S)a A validator that composes multiple validators into one. When called on a value, it runs all wrapped validators. Args: validators (~collections.abc.Iterable[typing.Callable]): Arbitrary number of validators. .. versionadded:: 17.1.0 )rrErxryrG) validatorsr>r2rrrrI s  rIcstddD}|rfdd}nfdd}s(td}|j||dn*td}|r7||jd <d }tsEt|trE|j }t| }|rR||jd <|r[t|d d d S|S)a A converter that composes multiple converters into one. When called on a value, it runs all wrapped converters, returning the *last* value. Type annotations will be inferred from the wrapped converters', if they have any. converters (~collections.abc.Iterable[typing.Callable]): Arbitrary number of converters. .. versionadded:: 20.1.0 css|]}t|tVqdSr*rEr)rcrrrr rVzpipe..cs,D]}t|tr||||n||}q|Sr*r{)rrrr| convertersrrpipe_converter szpipe..pipe_convertercsD]}||}q|Sr*r)rr|r}rrr s A)rrVrrr_rVTr^) rrr~r#rrcrrErr[rd)r~return_instancerrtlastrfrr}rrH s&    rH)NrN) rOrPrQrRrSrTrUrPrVrWr*) rOrPrUrPrQrRr]rTrVr^)rlrPrmrnrVr/)rVr)rVrx)T)NNNNNNNFFTFFFFFNNFFNNNTN)rr/rrPrVrP) rr/ryrzrrrrrVr)rr/ryrz)ryrFrVr)rVr)NN)rVrr r!)rvrPrrPrrrVrP)rrrrrr|)ryrzrrr#rr$rr rr%rr&rrr|rrrrr rr'rPrVr)rrPrVrP)i __future__rr+r0rIr'r rLrdrrCrlcollections.abcrr functoolsrtypingrrrrNr r r r rrrrr exceptionsrrrrobjectrrr0rrKrDrEr/rHrr r Enumrrintr)rMr\rkrwrxrrrrrrrrrrrr@rryrrrrzrrrrrrdrrrrrrrrrr"rrrr>_arJrD_frrwrxrIrrrrs4      n  # ! l4 :N,  d  H % 8  9.  E  /  K     ' d  k