Hello,
I try to experiment with coroutines and I don't understand why this
snippet doesn't work as expected... In python 2.5 and python 2.6 I get
the following output:
0
Exception exceptions.TypeError: "'NoneType' object is not callable" in
<generator object at 0x7e43f8> ignored
The TypeError exception comes from the pprint instruction...
If i replace the main part with:
==
p1 = dump()
p2 = sort(p1)
for item in my_list: p2.send(item)
==
it works as expected.
I don't understand what is goind wrong. Has someone an explanation for
this issue?
Thanks,
Jérôme
===
from functools import wraps
from pprint import pprint
import random
def coroutine(f):
@wraps(f)
def start(*args, **kwargs):
res = f(*args, **kwargs)
res.next()
return res
return start
@coroutine
def sort(target):
l = []
try:
while True:
l.append((yield))
except GeneratorExit:
l.sort()
for item in l:
target.send(item)
@coroutine
def dump():
while True:
pprint((yield))
if __name__ == "__main__":
my_list = range(100)
random.shuffle(my_list)
p = sort(dump())
for item in my_list:
p.send(item)
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