"blaine" schrieb
>
> # Fake Nokia Screen Emulator
> import sys, os
>
> class nokia_fkscrn:
> def __init__(self, file):
> if not os.path.exists(file):
> os.mkfifo(file)
> self.fifodev = open(file, 'r')
> def read(self):
> while 1:
> r = self.fifodev.readline()
> print r
>
> nokia = nokia_fkscrn('dev.file')
> nokia.read()
>
> This works at first, but when I write to the 'dev.file'
> for the first time, the text is displayed as intended,
> but then the program just keeps spitting out blank lines.
> I can continue to write to the file
> (using echo 'test\n' > dev.file)
> and this shows up in my output, but amist a giant mass
> of scrolling blank lines. This also causes my CPU
> usage to shoot up to 100%.
>
> Any ideas? This is OS X 10.4
>
while 1:
r = self.fifodev.readline()
if r: print r
According to my docs, readline() returns an empty string
at the end of the file.
Also, you might want to sleep() between reads a little bit.
IMHO. HTH.
Martin
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