Package pypat :: Package behavioral :: Module null :: Class Null

Class Null

object --+
         |
        Null


A Null object class as part of the Null object design pattern.

- External Usage documentation: U{https://github.com/tylerlaberge/PyPatterns/wiki/Behavioral-Pattern-Usage}
- External Null Object Pattern documentation: U{https://en.wikipedia.org/wiki/Null_Object_pattern}

Instance Methods

[hide private]

__init__(self, *args, **kwargs)
Do nothing.

source code

Null

__call__(self, *args, **kwargs)
Do nothing.

source code

Null

__getattr__(self, name)
Do nothing.

source code

Null

__setattr__(self, name, value)
Do nothing.

source code

Null

__delattr__(self, name)
Do nothing.

source code

String

__repr__(self)
Null object string representation is the empty string.

source code

String

__str__(self)
Null object string representation is the empty string.

source code

Boolean

__bool__(self)
Null object evaluates to False.

source code

Inherited from object: __format__, __getattribute__, __hash__, __new__, __reduce__, __reduce_ex__, __sizeof__, __subclasshook__

Properties

[hide private]

Inherited from object: __class__

Method Details

[hide private]

init(self, *args, **kwargs)
(Constructor)

source code

Do nothing.

Overrides: object.__init__

call(self, *args, **kwargs)
(Call operator)

source code

Do nothing.

Returns: Null: This object instance.

getattr(self, name)
(Qualification operator)

source code

Do nothing.

Returns: Null: This object instance.

setattr(self, name, value)

source code

Do nothing.

Returns: Null: This object instance.
Overrides: object.__setattr__

delattr(self, name)

source code

Do nothing.

Returns: Null: This object instance.
Overrides: object.__delattr__

repr(self)
(Representation operator)

source code

Null object string representation is the empty string.

Returns: String: An empty string.
Overrides: object.__repr__

str(self)
(Informal representation operator)

source code

Null object string representation is the empty string.

Returns: String: An empty string.
Overrides: object.__str__

bool(self)

source code

Null object evaluates to False.

Returns: Boolean: False.

Class Null

__init__(self, *args, **kwargs) (Constructor)

__call__(self, *args, **kwargs) (Call operator)

__getattr__(self, name) (Qualification operator)

__setattr__(self, name, value)

__delattr__(self, name)

__repr__(self) (Representation operator)

__str__(self) (Informal representation operator)

__bool__(self)

init(self, *args, **kwargs)
(Constructor)

call(self, *args, **kwargs)
(Call operator)

getattr(self, name)
(Qualification operator)

setattr(self, name, value)

delattr(self, name)

repr(self)
(Representation operator)

str(self)
(Informal representation operator)

bool(self)