On 2011-12-08 08:59:26 +0000, Thomas Rachel said:
Am 08.12.2011 08:18 schrieb 88888 Dihedral:
I use the @ decorator to behave exactly like a c macro that
does have fewer side effects.
I am wondering is there other interesting methods to do the
jobs in Python?
In combination with a generator, you can do many funny things.
For example, you can build up a string:
def mkstring(f):
"""Turns a string generator into a string,
joining with ", ".
"""
return ", ".join(f())
def create_answer():
@mkstring
def people():
yield "Anna"
yield "John"
yield "Theo"
return "The following people were here: " + people
Many other things are thinkable...
Thomas
I am still perplexed about decorators though, am happily using Python
for many years without them, but maybe i am missing something?
For example in the above case, if I want the names attached to each
other with a comma, why wouldn't I just create a function doing exactly
this? Why would I first write a single name generator and then decorate
it so that I never can get single names anymore (this is the case,
isn't it? Once decorated, I can not get the original behaviour of the
function anymore.
So, above, why not
def mkstring(mylist):
with the same function declaration and then just call it with a list of
names that I generate elsewhere in my program?
I just can't identify the use-case for decorators, but as I said, maybe
I am missing something.
Michael
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