Python documentation for @? [duplicate]

This question already has answers here: What doe开发者_C百科s the "at" (@) symbol do in Python? (14 answers) Closed 5 years ago.

Just a quick question,

Could someone link me to the documentation for the use of @ in python?

Due not being able to google @ and not knowing the use or name of it I'm not sure how to find it on my own :)

Many thanks!!

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Symbols starting with "@" (e.g. @staticmethod) are called "decorators" in Python jargon.

You can find the PEP describing them at this url.

In short, they are syntactic sugar to invoke a function over the object being decorated, e.g.:

@staticmethod
def myfunc(...): ...

is equivalent to:

def myfunc(...): ...
myfunc = staticmethod(myfunc)

Then, searching on the web for "python decorator" will provide you with a lot of other useful information and use cases.

Hope it helps, ciao

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Python decorators:

http://docs.python.org/reference/compound_stmts.html#function

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Google for python decorator and you will find enough answers to your question.

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As other people said, they are decorators. They take the decorated object as an argument and return a new object - which should usually be the same type as the initial one (function or class)

If you do not like the at syntax, you can always write it like that:

@foo
def bar():
    pass

# is the same as:
def bar():
    pass
bar = foo(bar)