1樓：
import
time
defcoroutine
(func
):def
start(*
args,**
kargs
):cr
=func(*
args,**
kargs)cr
.send
(None
)return
crreturn
start
@coroutine
deffollow
(filename
,target
):fd
=open
(filename
)while
True
:line=fd
.readline
()if
notline
:time
.sleep
(0.1
)continue
target
.send
(line
)@coroutine
defpack
(linecount
,target
):content=
while
True
:line
=yield
ifline
:content.(
line)if
len(
content)==
linecount
:target
.send
(content
)content
.clear
()@coroutine
defdo_something
():while
True
:content
=yield
(content
)time
.sleep(2
)if__name__
=="__main__"
:follow
('/etc/mtab'
,pack(20
,do_something
()))
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