Aigars Aigars wrote:
Good day all,
I am learning Python and came up to decorators.
The question is: Why does function FoodList return value None?
The code in attachment.
Thank you,
Aigars
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First of all, you should always inherit from "object" whenever it is
possible.
Then the answer: you did not return the result.
Instead of
self.func(*args, **kwargs)
use this:
return self.func(*args, **kwargs)
Corrected example attached.
Best,
Laszlo
class Logger(object):
def __init__(self, function):
self.func = function
def __call__(self, *args, **kwargs):
print "Function %s called with args = %s, kwargs = %s" % (self.func.__name__, str(args), str(kwargs))
return self.func(*args, **kwargs) # Return is important here!
@Logger
def FoodList(a, b, c="spam"):
text = "Food is %s, %s, %s" % (a, b, c)
print text
return text
if __name__ == "__main__":
a = FoodList("eggs", "potatoes")
print a
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