On 19/07/14 12:40, Jerry lu wrote:
oh yeah i forgot about the decorators. Um say that you wanted to decorate a
function with the outer() func you would just put @outer on top of it? And this
is the same as passing another func into the outer func?
yes.
syntax was added because with very long function definitions it was
dificult to track reassignment to the name when it followed definition
of the function. decorators is just abbreviation.
>>> def outer(f):
... def inner(*args, **kwargs):
... print("inner function")
... return f(*args, **kwargs)
... return inner
...
>>> @outer
... def myfunc(x):
... print("Myfunc", x)
...
>>> myfunc("test")
inner function
Myfunc test
it is exactly equivalent to:
>>> def outer(f):
... def inner(*args, **kwargs):
... print("inner function")
... return f(*args, **kwargs)
... return inner
...
>>> def myfunc(x):
... print("Myfunc", x)
...
>>> myfunc = outer(myfunc)
>>> myfunc("test")
inner function
Myfunc test
cheers
Wojciech
and also with the first example you say x is in the scope when is was created
can you define x in the outer func and refer to it in the inner func?
check nonlocal.
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