Strange loop behavior
Gabriel Rossetti
gabriel.rossetti at mydeskfriend.com
Wed Mar 26 04:35:07 EDT 2008
Hello,
I wrote a program that reads data from a file and puts it in a string,
the problem is that it loops infinitely and that's not wanted, here is
the code :
d = repr(f.read(DEFAULT_BUFFER_SIZE))
while d != "":
file_str.write(d)
d = repr(f.read(DEFAULT_BUFFER_SIZE))
I also tried writing the while's condition like so : len(d) > 0, but
that doesn't change anything. I tried step-by-step debugging using
PyDev(eclipse plugin) and I noticed this, once the while was read once,
it is never re-read, basically, the looping does happen, but just in
between the two lines in the loop's body/block, it never goes on the
while and thus never verifies the condition and thus loops forever. I
had been using psyco (a sort of JIT for python) and so I uninstalled it
and restarted eclipse and I still get the same thing. This looks like
some bug, but I may be wrong, does anybody understand what's going on here?
Thanks,
Gabriel
PS
And yes I checked, the "d" variable is en empty string at some point, so
the looping should stop.
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