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

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

from?_weakrefset?import?WeakSet


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?abstractclassmethod（classmethod）:
????“““
????A?decorator?indicating?abstract?classmethods.

????Similar?to?abstractmethod.

????Usage:

????????class?C（metaclass=ABCmeta）:
????????????@abstractclassmethod
????????????def?my_abstract_classmethod（cls?...）:
????????????????...

????‘abstractclassmethod‘?is?deprecated.?Use?‘classmethod‘?with
????‘abstractmethod‘?instead.
????“““

????__isabstractmethod__?=?True

????def?__init__（self?callable）:
????????callable.__isabstractmethod__?=?True
????????super（）.__init__（callable）


class?abstractstaticmethod（staticmethod）:
????“““
????A?decorator?indicating?abstract?staticmethods.

????Similar?to?abstractmethod.

????Usage:

????????class?C（metaclass=ABCmeta）:
????????????@abstractstaticmethod
????????????def?my_abstract_staticmethod（...）:
????????????????...

????‘abstractstaticmethod‘?is?deprecated.?Use?‘staticmethod‘?with
????‘abstractmethod‘?instead.
????“““

????__isabstractmethod__?=?True

????def?__init__（self?callable）:
????????callable.__isabstractmethod__?=?True
????????super（）.__init__（callable）


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）

????‘abstractproperty‘?is?deprecated.?Use?‘property‘?with?‘abstractmethod‘
????instead.
????“““

????__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.??

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2020-06-06?11:06??.idea\
?????目錄???????????0??2020-06-06?11:06??.idea\dictionaries\
?????文件??????????92??2019-04-02?20:07??.idea\dictionaries\Administrator.xml
?????文件?????????466??2019-04-02?20:07??.idea\LearnWeb.iml
?????文件?????????196??2019-04-02?20:07??.idea\misc.xml
?????文件?????????268??2019-04-02?20:07??.idea\modules.xml
?????文件???????20031??2019-04-02?20:07??.idea\workspace.xml
?????目錄???????????0??2020-06-06?11:06??css\
?????文件???????17708??2019-04-02?20:07??css\common.css
?????文件????????4982??2019-04-02?20:07??css\iconfont.css
?????目錄???????????0??2020-06-06?11:06??img\
?????文件??????133191??2019-04-02?20:07??img\ad1.jpg
?????文件???????97593??2019-04-02?20:07??img\ad2.jpg
?????文件???????34343??2019-04-02?20:07??img\ad3.jpg
?????文件??????101544??2019-04-02?20:07??img\ad4.jpg
?????文件????????1843??2019-04-02?20:07??img\earphone.png
?????文件??????118315??2019-04-02?20:07??img\jiadian.jpg
?????文件???????57935??2019-04-02?20:07??img\jiadian02.jpg
?????文件???????31168??2019-04-02?20:07??img\jiadian1.jpg
?????文件???????26560??2019-04-02?20:07??img\jiadian2.jpg
?????文件??????358155??2019-04-02?20:07??img\jiadian3.jpg
?????文件???????28892??2019-04-02?20:07??img\jiadian4.jpg
?????文件???????57935??2019-04-02?20:07??img\jiadian5.jpg
?????文件???????57356??2019-04-02?20:07??img\jiadian6.png
?????文件??????146370??2019-04-02?20:07??img\jiadian7.png
?????文件???????56563??2019-04-02?20:07??img\jiadian8.png
?????文件???????15319??2019-04-02?20:07??img\jingshuiqi.jpg
?????文件????????1170??2019-04-02?20:07??img\mi-logo.png
?????文件???????16579??2019-04-02?20:07??img\nav.gif
?????文件???????25042??2019-04-02?20:07??img\phone-小米6x.jpg
?????文件???????31697??2019-04-02?20:07??img\phone-小米8SE.jpg
............此處省略2334個文件信息