| Section | Video Links |
|---|---|
| State Overview |    |
| State Use Case | |
| __call__ Attribute | |
... Refer to Design Patterns In Python website to read textual content.
... Refer to Design Patterns In Python website to read textual content.
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python.exe ./state/state_concept.py
I am ConcreteStateB
I am ConcreteStateA
I am ConcreteStateB
I am ConcreteStateA
I am ConcreteStateC... Refer to Design Patterns In Python website to read textual content.
python.exe ./state/client.py
Task Started
Task Running
Task Finished
Task Started
Task RunningOverloading the __call__ method makes an instance of a class callable like a function when by default it isn't. You need to call a method within the class directly.
class ExampleClass:
@staticmethod
def do_this_by_default():
print("doing this")
EXAMPLE = ExampleClass()
EXAMPLE.do_this_by_default() # needs to be explicitly called to executeIf you want a default method in your class, you can point to it using by the __call__ method.
class ExampleClass:
@staticmethod
def do_this_by_default():
print("doing this")
__call__ = do_this_by_default
EXAMPLE = ExampleClass()
EXAMPLE() # function now gets called by default... Refer to Design Patterns In Python website to read textual content.