#?Copyright?2007?Google?Inc.?All?Rights?Reserved.
#?Licensed?to?PSF?under?a?Contributor?Agreement.

“““Abstract?base?Classes?（ABCs）?according?to?PEP?3119.“““

import?types

from?_weakrefset?import?WeakSet

#?Instance?of?old-style?class
class?_C:?pass
_InstanceType?=?type（_C（））


def?abstractmethod（funcobj）:
????“““A?decorator?indicating?abstract?methods.

????Requires?that?the?metaclass?is?ABCmeta?or?derived?from?it.??A
????class?that?has?a?metaclass?derived?from?ABCmeta?cannot?be
????instantiated?unless?all?of?its?abstract?methods?are?overridden.
????The?abstract?methods?can?be?called?using?any?of?the?normal
????‘super‘?call?mechanisms.

????Usage:

????????class?C:
????????????__metaclass__?=?ABCmeta
????????????@abstractmethod
????????????def?my_abstract_method（self?...）:
????????????????...
????“““
????funcobj.__isabstractmethod__?=?True
????return?funcobj


class?abstractproperty（property）:
????“““A?decorator?indicating?abstract?properties.

????Requires?that?the?metaclass?is?ABCmeta?or?derived?from?it.??A
????class?that?has?a?metaclass?derived?from?ABCmeta?cannot?be
????instantiated?unless?all?of?its?abstract?properties?are?overridden.
????The?abstract?properties?can?be?called?using?any?of?the?normal
????‘super‘?call?mechanisms.

????Usage:

????????class?C:
????????????__metaclass__?=?ABCmeta
????????????@abstractproperty
????????????def?my_abstract_property（self）:
????????????????...

????This?defines?a?read-only?property;?you?can?also?define?a?read-write
????abstract?property?using?the?‘long‘?form?of?property?declaration:

????????class?C:
????????????__metaclass__?=?ABCmeta
????????????def?getx（self）:?...
????????????def?setx（self?value）:?...
????????????x?=?abstractproperty（getx?setx）
????“““
????__isabstractmethod__?=?True


class?ABCmeta（type）:

????“““metaclass?for?defining?Abstract?base?Classes?（ABCs）.

????Use?this?metaclass?to?create?an?ABC.??An?ABC?can?be?subclassed
????directly?and?then?acts?as?a?mix-in?class.??You?can?also?register
????unrelated?concrete?classes?（even?built-in?classes）?and?unrelated
????ABCs?as?‘virtual?subclasses‘?--?these?and?their?descendants?will
????be?considered?subclasses?of?the?registering?ABC?by?the?built-in
????issubclass（）?function?but?the?registering?ABC?won‘t?show?up?in
????their?MRO?（Method?Resolution?Order）?nor?will?method
????implementations?defined?by?the?registering?ABC?be?callable?（not
????even?via?super（））.

????“““

????#?A?global?counter?that?is?incremented?each?time?a?class?is
????#?registered?as?a?virtual?subclass?of?anything.??It?forces?the
????#?negative?cache?to?be?cleared?before?its?next?use.
????_abc_invalidation_counter?=?0

????def?__new__（mcls?name?bases?namespace）:
????????cls?=?super（ABCmeta?mcls）.__new__（mcls?name?bases?namespace）
????????#?Compute?set?of?abstract?method?names
????????abstracts?=?set（name
?????????????????????for?name?value?in?namespace.items（）
????????????

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件??????461824??2014-08-20?14:21??VixAllProducts.dll
?????文件????????7524??2014-08-20?14:21??pin\LICENSE
?????文件???????32369??2014-08-20?14:21??pin\README
?????文件?????1080656??2014-08-20?14:21??pin\ia32\bin\dbghelp.dll
?????文件??????533504??2014-08-20?14:21??pin\ia32\bin\pin.exe
?????文件?????1542656??2014-08-20?14:21??pin\ia32\bin\pindb.exe
?????文件????????6144??2014-08-20?14:21??pin\ia32\bin\pinjitprofiling.dll
?????文件??????155648??2014-08-20?14:21??nunit.core.dll
?????文件?????4051456??2014-08-20?14:21??pin\ia32\bin\pinvm.dll
?????文件??????197632??2014-11-11?17:08??ComTest.dll
?????文件?????2132992??2014-08-20?14:21??pin\ia32\bin\vsdbg.dll
?????文件?????2198528??2014-11-11?17:08??ComTest.pdb
?????文件????????1528??2014-11-11?17:08??ComTest.lib
?????文件?????1369936??2014-08-20?14:21??pin\intel64\bin\dbghelp.dll
?????文件??????676352??2014-08-20?14:21??pin\intel64\bin\pin.exe
?????文件??????303104??2014-11-11?17:08??CrashableServer.exe
?????文件?????1803776??2014-08-20?14:21??pin\intel64\bin\pindb.exe
?????文件?????1534976??2014-11-11?17:08??CrashableServer.pdb
?????文件????????6656??2014-08-20?14:21??pin\intel64\bin\pinjitprofiling.dll
?????文件??????101888??2014-11-11?17:08??CrashingFileConsumer.exe
?????文件?????1117184??2014-11-11?17:08??CrashingFileConsumer.pdb
?????文件?????5107712??2014-08-20?14:21??pin\intel64\bin\pinvm.dll
?????文件?????2579968??2014-08-20?14:21??pin\intel64\bin\vsdbg.dll
?????文件??????313344??2014-11-11?17:08??CrashingProgram.exe
?????文件???????49152??2014-08-20?14:21??pin\pin.exe
?????文件?????1600512??2014-11-11?17:08??CrashingProgram.pdb
?????文件??????439808??2014-08-20?14:21??NLog.dll
?????文件???????72704??2014-08-20?14:21??SharpPcap.dll
?????文件??????193536??2014-08-20?14:21??PacketDotNet.dll
?????文件??????120257??2014-08-20?14:21??peach.xsd
?????文件????????2472??2014-08-20?14:21??samples\CrashableServer.xml
............此處省略794個文件信息