Bill wrote:
Chris Angelico wrote:
Decorators are fairly straight-forward if you understand higher-order
functions. <snip>
ChrisA
I was just minding my own business, and thought to write my first
decorator for a simple *recursive* function f. The decorator WORKS if
f does not make a call to itself
(it really wasn't).
Using the (PyCharm) debugger, I determined that my inner function that
was calling my wrapped (Fibonacci sequence) function but wasn't
returning anything to the invoking environment. I fixed it for the sake
of a good, if costly, lesson. Not much of a wrapper, but it "works". A
version which merely prints a tab before the function call, instead of a
row of asterisks produces output which is more interesting to look at.
def wrap(func):
def inner(*args, **kwargs):
print('*'*20)
a= func(*args, **kwargs)
print(a)
print('*'*20)
return a
return inner
Bill
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