U pd@sdZdddddgZiZdddZddZzeWnek rDYnXd d Zeeeed d Zd Z ddZ ddZ ddZ ddZ iZiZiZddZddZddZdS)zHelper to provide extensibility for pickle. This is only useful to add pickle support for extension types defined in C, not for instances of user-defined classes. pickle constructor add_extensionremove_extensionclear_extension_cacheNcCs,t|std|t|<|dk r(t|dS)Nz$reduction functions must be callable)callable TypeErrordispatch_tabler)ob_typepickle_functionconstructor_obr /usr/lib/python3.8/copyreg.pyr s cCst|stddS)Nzconstructors must be callable)rr)objectr r r rscCst|j|jffSN)complexrealimag)cr r r pickle_complex"srcCs<|tkrt|}n$|||}|jtjkr8||||Sr)r__new____init__)clsbasestateobjr r r _reconstructor)s     ric Cs|dks t|j}|jD]}t|dr|jt@sq:qt}|tkrHd}n"||krbtd|jd||}|||f}z |j }Wn\t k rt |ddrtd|jd|dz |j }Wnt k rd}YnXYnX|}|rt ||fSt |fSdS)N __flags__zcannot pickle z object __slots__zf object: a class that defines __slots__ without defining __getstate__ cannot be pickled with protocol )AssertionError __class____mro__hasattrr _HEAPTYPErr__name__ __getstate__AttributeErrorgetattr__dict__r)selfprotorrrargsgetstatedictr r r _reduce_ex6s6       r.cGs|j|f|Srr)rr+r r r __newobj__Zsr0cCs|j|f||S)zUsed by pickle protocol 4, instead of __newobj__ to allow classes with keyword-only arguments to be pickled correctly. r/)rr+kwargsr r r __newobj_ex__]sr2cCs|jd}|dk r|Sg}t|ds(n|jD]}d|jkr.|jd}t|trV|f}|D]^}|dkrjqZqZ|dr|ds|j d}|r| d||fq| |qZ| |qZq.z ||_ Wn YnX|S)aReturn a list of slot names for a given class. This needs to find slots defined by the class and its bases, so we can't simply return the __slots__ attribute. We must walk down the Method Resolution Order and concatenate the __slots__ of each class found there. (This assumes classes don't modify their __slots__ attribute to misrepresent their slots after the class is defined.) __slotnames__Nr)r( __weakref_____z_%s%s) r(getr"r! isinstancestr startswithendswithr$lstripappendr3)rnamesrslotsnamestrippedr r r _slotnamescs2         rBcCst|}d|krdks&ntd||f}t||krNt||krNdS|tkrjtd|t|f|tkrtd|t|f|t|<|t|<dS)zRegister an extension code.izcode out of rangeNz)key %s is already registered with code %sz$code %s is already in use for key %s)int ValueError_extension_registryr7_inverted_registrymoduler@codekeyr r r rs$   cCsR||f}t||ks$t||kr4td||ft|=t|=|tkrNt|=dS)z0Unregister an extension code. For testing only.z%key %s is not registered with code %sN)rFr7rGrE_extension_cacherHr r r rs cCs tdSr)rLclearr r r r rs)N)__doc____all__rrrr NameErrorrrr#r.r0r2rBrFrGrLrrrr r r r s4   $<