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Edit File: declarations.cpython-310.pyc
o $ x`1� � @ sf d Z dZddlZddlmZ ddlmZ ddlmZ ddlZddlm Z ddl m Z dd l m Z dd l m Z dd l mZ dd l mZ dd lmZ ddlmZ ddlmZ g Zi ZdZdZdd� ZG dd� de�ZG dd� de�Z G dd� de �Z G dd� dee �Z d d � Z d d � Z ed d!� �Z!d"d#� Z"d$d%� Z#d&d'� Z$dYd)d*�Z%d+d,� Z&G d-d.� d.e�Z'G d/d0� d0e�Z(d1d2� Z)d3d4� Z*d5d6� Z+G d7d8� d8e �Z,e,Z-e�.� Z/d9d8� Z,d:e,_0d;d<� Z1d=d>� Z2d?d@� Z3eG dAdB� dBe ��Z4G dCdD� dDe e4�Z5dEdF� Z6dGdH� Z7dIdJ� Z8G dKdL� dLe�Z9dMdN� Z:dOdP� Z;edQdR� �Z<edSdT� �Z=eG dUdV� dVe��Z>dZdWdX�Z?e � Z@e>� ZAdS )[a� Implementation of interface declarations There are three flavors of declarations: - Declarations are used to simply name declared interfaces. - ImplementsDeclarations are used to express the interfaces that a class implements (that instances of the class provides). Implements specifications support inheriting interfaces. - ProvidesDeclarations are used to express interfaces directly provided by objects. �restructuredtext� N)� FunctionType)� MethodType)� ModuleType)�addClassAdvisor)� Interface)�InterfaceClass)�SpecificationBase)� Specification)� NameAndModuleComparisonMixin)� CLASS_TYPES)�PYTHON3)� _use_c_implzIClass advice impossible in Python3. Use the @%s class decorator instead.z\The %s API is deprecated, and will not work in Python3 Use the @%s class decorator instead.c C s( | j }| j}|j}||�|�d }|S )N� )�__self_class__� __thisclass__�__mro__�index)�ob� self_class�class_that_invoked_super� complete_mro� next_class� r �=/usr/lib/python3/dist-packages/zope/interface/declarations.py�_next_super_class= s r c @ s e Zd Zdd� Zdd� ZdS )�namedc C � || _ d S �N)�name)�selfr r r r �__init__I � znamed.__init__c C s | j |_|S r )r �__component_name__�r r r r r �__call__L s znamed.__call__N)�__name__� __module__� __qualname__r! r% r r r r r G s r c @ s` e Zd ZdZdZdd� Zdd� Zdd� Zd d � Zd d � Z d d� Z e Z e dd� �Z e dd� �ZdS )� DeclarationzInterface declarationsr c G s t �| t|�� d S r )r r! �_normalizeargs)r �basesr r r r! V s zDeclaration.__init__c C s | � |�o || �� v S )z:Test whether an interface is in the specification )�extends� interfaces)r � interfacer r r � __contains__Y s zDeclaration.__contains__c C s | � � S )zCReturn an iterator for the interfaces in the specification �r- �r r r r �__iter___ s zDeclaration.__iter__c C s t | j�S )zCReturn an iterator of all included and extended interfaces )�iter�__iro__r1 r r r � flattenedd � zDeclaration.flattenedc s t � fdd�| �� D �� S )z/Remove interfaces from a specification c s& g | ]� � fd d��� � D �s� �qS )c s g | ] }� � |d �r|�qS )r �r, )�.0�j��ir r � <listcomp>n s ��z2Declaration.__sub__.<locals>.<listcomp>.<listcomp>r0 )r8 ��otherr: r r< l s ���z'Declaration.__sub__.<locals>.<listcomp>)r) r- )r r> r r= r �__sub__i s �zDeclaration.__sub__c sr g }t | �� �}t|�}|�� D ]"� � |v rq|�� � t� fdd�|D ��r-|�� � q|�� � qt|| � S )a� Add two specifications or a specification and an interface and produce a new declaration. .. versionchanged:: 5.4.0 Now tries to preserve a consistent resolution order. Interfaces being added to this object are added to the front of the resulting resolution order if they already extend an interface in this object. Previously, they were always added to the end of the order, which easily resulted in invalid orders. c 3 s � | ]}� � |�V qd S r r7 �r8 �xr: r r � <genexpr>� s � z&Declaration.__add__.<locals>.<genexpr>)�listr- �set�add�any�appendr) )r r> �before�result�seenr r: r �__add__u s zDeclaration.__add__c s( t |�� t� fdd�| D ��} | � f S )Nc s g | ] }� � |�s|�qS r )� isOrExtends)r8 �iface��implemented_by_clsr r r< � s ��z6Declaration._add_interfaces_to_cls.<locals>.<listcomp>)� implementedBy�tuple)r- �clsr rN r �_add_interfaces_to_cls� s � z"Declaration._add_interfaces_to_clsc C s� g }t � }| D ]@}t}t|t�r|j}t}n t|t�r!|j}t}nt|t�r/|j s/|j | v r/qt|�}||v }|� |� |rB||�}|� |� qd� |�S )N�, )rD �repr� isinstancer r& �str�type�_implements_name� Implements�declared�inheritrE rG �join)r- � ordered_names�namesrM �duplicate_transform� this_name� already_seenr r r �_argument_names_for_repr� s, � z$Declaration._argument_names_for_reprN)r& r' r( �__doc__� __slots__r! r/ r2 r5 r? rK �__radd__� staticmethodrS rc r r r r r) Q s r) c @ s� e Zd ZdZdZdd� Zdd� Zedd� �Zej d d� �Zed d � �Z d d � Z Z Z dd� Zddd�Zddd�Zddd�Zedd� �Zej dd� �ZdS ) �_ImmutableDeclarationr Nc C s t jd u r t�| �t _t jS r )rh � _ImmutableDeclaration__instance�object�__new__)rR r r r rk � s z _ImmutableDeclaration.__new__c C � dS )N�_emptyr r1 r r r � __reduce__� � z _ImmutableDeclaration.__reduce__c C rl �Nr r r1 r r r � __bases__� � z _ImmutableDeclaration.__bases__c C s |dkrt d��d S )Nr z7Cannot set non-empty bases on shared empty Declaration.)� TypeError)r � new_basesr r r rq � s �c C � i S r r r1 r r r � dependents� rr z _ImmutableDeclaration.dependentsc C � d S r r )r �_ignoredr r r �<lambda>� s z _ImmutableDeclaration.<lambda>c C s t d�S rp )r3 r1 r r r r- � s z _ImmutableDeclaration.interfacesTc C s || j u S r )�_ROOT)r r. �strictr r r r, � r" z _ImmutableDeclaration.extendsc C s |S r r )r r �defaultr r r �get� ro z_ImmutableDeclaration.getc C s t S r )rh )r �callbackr r r �weakref� s z _ImmutableDeclaration.weakrefc C ru r r r1 r r r �_v_attrs s z _ImmutableDeclaration._v_attrsc C rw r r )r � new_attrsr r r r� rr )Tr )r& r' r( re ri rk rn �propertyrq �setterrv �changed� subscribe� unsubscriber- r, r} r r� r r r r rh � s( rh c sH e Zd ZdZdZdZdZ edd� �Z� fdd�Zdd � Z d d � Z � Z S ) rZ Nr �?c G s | � | �}||_|j|� |S r )rk r& r! )rR r r+ �instr r r r A s zImplements.namedc s, z| ` W n ty Y nw tt| ��|�S r )� _super_cache�AttributeError�superrZ r� )r �originally_changed�� __class__r r r� M s �zImplements.changedc C sJ | j rt| j dd �pt| j �}n| j}| �| j�}|r d| }d||f S )Nr& rT zclassImplements(%s%s))r\ �getattrrY r& rc r[ )r r �declared_namesr r r �__repr__T s zImplements.__repr__c C s t | jffS r )rP r\ r1 r r r rn ^ � zImplements.__reduce__) r& r' r( r\ r[ r� � classmethodr r� r� rn � __classcell__r r r� r rZ s rZ c C s$ t | dd�pdd t | dd�pd S )Nr' r� �.r& )r� )r r r r rY b s ��rY c C s� t | j�}|j}|d u rt�� }|_| j}z|| W S ty$ Y nw t| �}t |�}| jj}|� |�}||d � }dd� |D �} t j |j d |j g| �R � } |j | _ |j| _| ||< | S )Nc S � g | ]}t |��qS r �rP �r8 �cr r r r< � � z(_implementedBy_super.<locals>.<listcomp>�:)rP r r� r �WeakKeyDictionaryr �KeyErrorr r r rZ r r& r\ r[ ) �sup�implemented_by_self�cache�key�next_cls�implemented_by_next�mro� ix_next_cls�classes_to_keeprt �newr r r �_implementedBy_supero s2 � ��r� c C s� zt | t�r t| �W S | j�d�}W n4 tyF t| dd�}|du r4t�| �}|dur0| Y S t Y S |j t kr=| Y S t t |f�� Y S w t |t �rN|S |du r]t�| �}|dur]|S t | �}|dury|f}t j|gt |��R � }d|_| `n+z| j}W n ty� t| �s�td| ��d}Y nw t j|gdd� |D ��R � }| |_z*|| _t| d�s�t| _t | t�r�d| jvr�t| t| d t| ���| _W |S W |S W |S ty� t | t�s�td | ��|t| < Y |S w ) z�Return the interfaces implemented for a class' instances The value returned is an `~zope.interface.interfaces.IDeclaration`. �__implemented__Nz$ImplementedBy called for non-factoryr c S r� r r� r� r r r r< � r� z!implementedBy.<locals>.<listcomp>�__providedBy__� __provides__r� z!ImplementedBy called for non-type)rV r� r� �__dict__r} r� r� �#BuiltinImplementationSpecificationsrm r� rZ r) r* rY r r\ r� rq �callablers �hasattr� objectSpecificationDescriptorr� �DescriptorAwareMetaClasses� ClassProvidesrX r� )rR �spec� spec_namer+ r r r rP � sr � � � � � � �rP c G s* t | �}d|_d|_d|_t||d� dS )a Declare the only interfaces implemented by instances of a class The arguments after the class are one or more interfaces or interface specifications (`~zope.interface.interfaces.IDeclaration` objects). The interfaces given (including the interfaces in the specifications) replace any previous declarations, *including* inherited definitions. If you wish to preserve inherited declarations, you can pass ``implementedBy(cls)`` in *interfaces*. This can be used to alter the interface resolution order. r N)rP r[ r\ rq �_classImplements_ordered)rR r- r� r r r �classImplementsOnly� s r� c G sl t | �}tt|��}g }g }|D ]}|jD ]}|�|�r#|�|� nq|�|� qt|t|�t|�� dS )aN Declare additional interfaces implemented for instances of a class The arguments after the class are one or more interfaces or interface specifications (`~zope.interface.interfaces.IDeclaration` objects). The interfaces given (including the interfaces in the specifications) are added to any interfaces previously declared. An effort is made to keep a consistent C3 resolution order, but this cannot be guaranteed. .. versionchanged:: 5.0.0 Each individual interface in *interfaces* may be added to either the beginning or end of the list of interfaces declared for *cls*, based on inheritance, in order to try to maintain a consistent resolution order. Previously, all interfaces were added to the end. .. versionchanged:: 5.1.0 If *cls* is already declared to implement an interface (or derived interface) in *interfaces* through inheritance, the interface is ignored. Previously, it would redundantly be made direct base of *cls*, which often produced inconsistent interface resolution orders. Now, the order will be consistent, but may change. Also, if the ``__bases__`` of the *cls* are later changed, the *cls* will no longer be considered to implement such an interface (changing the ``__bases__`` of *cls* has never been supported). N)rP rQ r* r[ r, rG r� )rR r- r� rH �afterrM �br r r �classImplements s � �r� c C s t | �}t||fd� dS )a- Declare that instances of *cls* additionally provide *iface*. The second argument is an interface or interface specification. It is added as the highest priority (first in the IRO) interface; no attempt is made to keep a consistent resolution order. .. versionadded:: 5.0.0 r N)rP r� )rR rM r� r r r �classImplementsFirst< s r� r c s� � fdd�|D �}� fdd�|D �}g }t � }|� j|fD ]}|D ]}||vr1|�|� |�|� q!q t|�� _|}� jd urX� jjD ]}t|�}||vrW|�|� |�|� qCt|�� _d S )Nc �( g | ]}� � |�r|tu r� js|�qS r �rL r r[ r@ �r� r r r< P � ��z,_classImplements_ordered.<locals>.<listcomp>c r� r r� r@ r� r r r< U r� )rD r[ rG rE rQ r\ rq rP ) r� rH r� � new_declaredrJ �lr� r+ r� r r� r r� J s2 � � �� �r� c C s& | j d \}}| `|| g|�R � | S )N�__implements_advice_data__)r� r� )rR r- �do_classImplementsr r r �_implements_advices s r� c @ s$ e Zd ZdZdZdd� Zdd� ZdS )� implementera� Declare the interfaces implemented by instances of a class. This function is called as a class decorator. The arguments are one or more interfaces or interface specifications (`~zope.interface.interfaces.IDeclaration` objects). The interfaces given (including the interfaces in the specifications) are added to any interfaces previously declared, unless the interface is already implemented. Previous declarations include declarations for base classes unless implementsOnly was used. This function is provided for convenience. It provides a more convenient way to call `classImplements`. For example:: @implementer(I1) class C(object): pass is equivalent to calling:: classImplements(C, I1) after the class has been created. .. seealso:: `classImplements` The change history provided there applies to this function too. r0 c G r r r0 �r r- r r r r! � r" zimplementer.__init__c C sb t |t�rt|g| j�R � |S t|�}tj|g| j�R � }z||_W |S ty0 t d|��w )NzCan't declare implements) rV r� r� r- rY rZ r r� r� rs )r r r� r� r r r r% � s � �zimplementer.__call__N)r& r' r( rd re r! r% r r r r r� z s r� c @ � e Zd ZdZdd� Zdd� ZdS )�implementer_onlya� Declare the only interfaces implemented by instances of a class This function is called as a class decorator. The arguments are one or more interfaces or interface specifications (`~zope.interface.interfaces.IDeclaration` objects). Previous declarations including declarations for base classes are overridden. This function is provided for convenience. It provides a more convenient way to call `classImplementsOnly`. For example:: @implementer_only(I1) class C(object): pass is equivalent to calling:: classImplementsOnly(I1) after the class has been created. c G r r r0 r� r r r r! � r" zimplementer_only.__init__c C s, t |ttf�r td��t|g| j�R � |S )NzIThe implementer_only decorator is not supported for methods or functions.)rV r r � ValueErrorr� r- r$ r r r r% � s zimplementer_only.__call__N�r& r' r( rd r! r% r r r r r� � s r� c C s^ t �d�}|j}||ju sd|vrt| d ��d|v r!t| d ��||f|d< ttdd� d S )N� r' z* can be used only from a class definition.r� z- can be used only once in a class definition.� ��depth)�sys� _getframe�f_locals� f_globalsrs r r� )r r- r� �frame�localsr r r � _implements� s r� c G � t rttd ��td| t� dS )ac Declare interfaces implemented by instances of a class. .. deprecated:: 5.0 This only works for Python 2. The `implementer` decorator is preferred for all versions. This function is called in a class definition. The arguments are one or more interfaces or interface specifications (`~zope.interface.interfaces.IDeclaration` objects). The interfaces given (including the interfaces in the specifications) are added to any interfaces previously declared. Previous declarations include declarations for base classes unless `implementsOnly` was used. This function is provided for convenience. It provides a more convenient way to call `classImplements`. For example:: implements(I1) is equivalent to calling:: classImplements(C, I1) after the class has been created. r� � implementsN)r rs � _ADVICE_ERRORr� r� r0 r r r r� � s ! r� c G r� )ak Declare the only interfaces implemented by instances of a class This function is called in a class definition. The arguments are one or more interfaces or interface specifications (`~zope.interface.interfaces.IDeclaration` objects). Previous declarations including declarations for base classes are overridden. This function is provided for convenience. It provides a more convenient way to call `classImplementsOnly`. For example:: implementsOnly(I1) is equivalent to calling:: classImplementsOnly(I1) after the class has been created. r� �implementsOnlyN)r rs r� r� r� r0 r r r r� s r� c @ s8 e Zd ZdZdd� ZdZdd� Zdd� Zd Zd d � Zd S ) �Providesz�Implement ``__provides__``, the instance-specific specification When an object is pickled, we pickle the interfaces that it implements. c G s0 |f| | _ || _tj| g| �||��R � d S r )�_Provides__args�_clsr) r! rS )r rR r- r r r r! 3 s zProvides.__init__r c C s� d}| j tu r| jrd}| jdd � }n d}| j f| j }| �|�}|r:| j}t|�dkr3d|d }d|f | }d||f S ) N�directlyProvidesTr Fzsys.modules[%r]r z%s, z%s(%s))r� r �_v_module_namesr� rq rc �len)r � function_name�providing_on_moduler- r^ � mod_namesr r r r� ; s$ ��zProvides.__repr__c C s t | jfS r )r� r� r1 r r r rn [ r6 zProvides.__reduce__zzope.interfacec C s |du r || j u r | S td��)zHMake sure that a class __provides__ doesn't leak to an instance Nr� )r� r� �r r� rR r r r �__get__b s zProvides.__get__N) r& r' r( rd r! r� r� rn r� r r r r r� - s r� c G s& t �| �}|du rt| � }|t | < |S )z�Cache instance declarations Instance declarations are shared among instances that have the same declaration. The declarations are cached in a weak value dictionary. N)�InstanceDeclarationsr} � ProvidesClass)r- r� r r r r� s s Tc G s� t | dd�}|durt |dd�|u rt| t�std��t|�}|du r't| �}d}tD ] }t||�r6d} nq+|rEt| |g|�R � | _dS t |g|�R � }| _t|t �ret | d�rg| j | j f7 _ dS dS dS )aY Declare interfaces declared directly for an object The arguments after the object are one or more interfaces or interface specifications (`~zope.interface.interfaces.IDeclaration` objects). The interfaces given (including the interfaces in the specifications) replace interfaces previously declared for the object. r� NzHAttempt to make an interface declaration on a non-descriptor-aware classFTr& )r� rV r� rs r* rX � issubclassr� r� r� r r� r� r& )rj r- rR �issub�damc�providesr r r r� � s* � ��r� c G s t | t| �g|�R � dS )aZ Declare interfaces declared directly for an object The arguments after the object are one or more interfaces or interface specifications (`~zope.interface.interfaces.IDeclaration` objects). The interfaces given (including the interfaces in the specifications) are added to the interfaces previously declared for the object. N)r� �directlyProvidedBy)rj r- r r r � alsoProvides� s r� c C s( t | t| �| � |�| �rtd��dS )z; Removes a directly provided interface from an object. z-Can only remove directly provided interfaces.N)r� r� � providedByr� )rj r. r r r �noLongerProvides� s �r� c @ � e Zd ZdZdd� ZdS )�ClassProvidesBase)r� r� c C s$ || j u r|d u r | S | jS td���Nr� )r� r� r� r� r r r r� � s zClassProvidesBase.__get__N)r& r' r( re r� r r r r r� � s r� c @ s2 e Zd ZdZdZdd� Zdd� Zdd� Zej Z d S ) r� z�Special descriptor for class ``__provides__`` The descriptor caches the implementedBy info, so that we can get declarations for objects without instance-specific interfaces a bit quicker. )�__argsc G s< || _ t|�| _||f| | _tj| g| �||��R � d S r )r� rP r� �_ClassProvides__argsr) r! rS )r rR �metaclsr- r r r r! � s zClassProvides.__init__c C s* | j f| jdd � }| �|�}d|f S )Nr� zdirectlyProvides(%s))r� r� rc )r r- r^ r r r r� � s zClassProvides.__repr__c C s | j | jfS r )r� r� r1 r r r rn � r� zClassProvides.__reduce__N) r& r' r( rd re r! r� rn r� r� r r r r r� � s r� c C s4 t | dd�}|du st|t�rtS t|jdd� �S )z�Return the interfaces directly provided by the given object The value returned is an `~zope.interface.interfaces.IDeclaration`. r� N���)r� rV rZ rm r) rq )rj r� r r r r� � s �r� c G sf t rttd ��t�d�}|j}||ju sd|vr td��d|v r%td��t| �|d< tt dd� d S ) a� Declare interfaces provided directly by a class This function is called in a class definition. The arguments are one or more interfaces or interface specifications (`~zope.interface.interfaces.IDeclaration` objects). The given interfaces (including the interfaces in the specifications) are used to create the class's direct-object interface specification. An error will be raised if the module class has an direct interface specification. In other words, it is an error to call this function more than once in a class definition. Note that the given interfaces have nothing to do with the interfaces implemented by instances of the class. This function is provided for convenience. It provides a more convenient way to call `directlyProvides` for a class. For example:: classProvides(I1) is equivalent to calling:: directlyProvides(theclass, I1) after the class has been created. �providerr r' z7classProvides can be used only from a class definition.r� z:classProvides can only be used once in a class definition.r� r� N) r rs r� r� r� r� r� r* r �_classProvides_advice)r- r� r� r r r � classProvides s � r� c C s" | j d }| `t| g|�R � | S r� )r� r� r� )rR r- r r r r� D s r� c @ r� )r� z(Class decorator version of classProvidesc G r r r0 r� r r r r! P r" zprovider.__init__c C s t |g| j�R � |S r )r� r- r$ r r r r% S s zprovider.__call__Nr� r r r r r� M s r� c G sn t �d�}|j}||jusd|vrtd��d|v r td��ttgt| ��R � }|d< | j|d f7 _dS )a Declare interfaces provided by a module This function is used in a module definition. The arguments are one or more interfaces or interface specifications (`~zope.interface.interfaces.IDeclaration` objects). The given interfaces (including the interfaces in the specifications) are used to create the module's direct-object interface specification. An error will be raised if the module already has an interface specification. In other words, it is an error to call this function more than once in a module definition. This function is provided for convenience. It provides a more convenient way to call directlyProvides. For example:: moduleProvides(I1) is equivalent to:: directlyProvides(sys.modules[__name__], I1) r r& z9moduleProvides can only be used from a module definition.r� z<moduleProvides can only be used once in a module definition.N) r� r� r� r� rs r� r r* r� )r- r� r� �pr r r �moduleProvidesX s ���r� c C s t || �S )zfProvide object specifications These combine information for the object and for it's classes. )r� )�directrR r r r �ObjectSpecification� s r� c C s` z| j }W n ty d }Y nw |d ur t|t�r |S z| j}W t|�S ty/ t Y S w r )r� r� rV r r� rm rP )r r� rR r r r �getObjectSpecification� s � ��r� c C s� zt | t�r t| �W S | j}W n ty t| � Y S w z|j W |S tyb z| j}W n ty? t| j� Y Y S w z| jj}W n tyS | Y Y S w ||u r_t| j� Y S Y |S w )a Return the interfaces provided by *ob*. If *ob* is a :class:`super` object, then only interfaces implemented by the remainder of the classes in the method resolution order are considered. Interfaces directly provided by the object underlying *ob* are not. ) rV r� rP r� r� r� r, r� r� )r �r�cpr r r r� � s4 � � � ���r� c @ r� )� ObjectSpecificationDescriptora� Implement the ``__providedBy__`` attribute The ``__providedBy__`` attribute computes the interfaces provided by an object. If an object has an ``__provides__`` attribute, that is returned. Otherwise, `implementedBy` the *cls* is returned. .. versionchanged:: 5.4.0 Both the default (C) implementation and the Python implementation now let exceptions raised by accessing ``__provides__`` propagate. Previously, the C version ignored all exceptions. .. versionchanged:: 5.4.0 The Python implementation now matches the C implementation and lets a ``__provides__`` of ``None`` override what the class is declared to implement. c C s4 |du rt |�S z|jW S ty t|� Y S w )z2Get an object specification for an object N)r� r� r� rP r� r r r r� � s �z%ObjectSpecificationDescriptor.__get__N)r& r' r( rd r� r r r r r� � s r� c C sL |du rg }| j }t|jv st|jv r|�| � |S | D ]}t||� q |S )z�Normalize declaration arguments Normalization arguments might contain Declarions, tuples, or single interfaces. Anything but individial interfaces or implements specs will be expanded. N)r� r r rZ rG r* )�sequence�outputrR �vr r r r* s � r* )r r r )Brd � __docformat__r� �typesr r r r �zope.interface.advicer �zope.interface.interfacer r r r r �zope.interface._compatr r� r r �__all__r� r� �_ADVICE_WARNINGr rj r r) rh rZ rY r� rP r� r� r� r� r� r� r� r� r� r� r� r� �WeakValueDictionaryr� �__safe_for_unpickling__r� r� r� r� r� r� r� r� r� r� r� r� r� r� r* rm r� r r r r �<module> s� w S�G / Z, )5'% @ ( (2 < <