What does this syntax mean in Keras Dropout(0.5)(X)?

 

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    • There are multiple ways that this code can work, 2 come into my mind right now:

    Using the built in __call__ function of classes 

    >>> class MyClass:
...     def __init__(self, name):
...             self.name = name
...     def __call__(self, word):
...             print(self.name, 'says', word)
...
>>> MyClass('Tom')('hello')
Tom says hello

    A function returning a function 

    >>> def add(a):
...     def f2(b):
...             print(a+b)
...     return f2
...
>>> add(1)(2)
3

    I hope this helps

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