[Pythonmac-SIG] Wierd Error/Bug in MacPython 2.0

[Chris Barker]

Jack Jansen wrote:
> I'd say just rerun the whole computation that generates the output file. The
> problem may have occurred earlier than the close() but may only become visible
> at that point.

Actually, it's reading an input file, but that makes little difference.
Actually, the code around the file closing is pretty darn simple, it's
essentially:

file = open(filename,'rb') # open as a binary file

for i in range(HeaderData['NumLines']):
    file.readline()
            
data = fromstring(file.read(NumBytes*NumTimesteps*NumLEs),UnsignedInt8)
file.close()

So I'll try wrapping that in a try: except (or maybe the whole function
this is in)

> The second try/except is a trick to clear the stacktrace: it will still
> contain open file objects for the input and output file, and you want to get
> rid of them before trying again.

hmmm. I don't quite understand this, but I'll take your word for it.
 
> I wouldn't do a "while 1:" because there are many reasons the thing could
> fail. If it fails for the silly-close-bug reason once every 400 times this
> code will make it fail only once very 16000 times, so that should be good
> enough.

Good point. I may wrap it in a "for i in range(10):" to really reduce my
odds!

Thanks for your ideas, I'll give them a try.

-Chris


-- 
Christopher Barker,
Ph.D.                                                           
ChrisHBarker@home.net                 ---           ---           ---
http://members.home.net/barkerlohmann ---@@       -----@@       -----@@
                                   ------@@@     ------@@@     ------@@@
Oil Spill Modeling                ------   @    ------   @   ------   @
Water Resources Engineering       -------      ---------     --------    
Coastal and Fluvial Hydrodynamics --------------------------------------
------------------------------------------------------------------------