Re: 'error reading datastream' -- loading file only when transfer is complete?
thanks all. this seemed to work: import os stat = os.stat(str(newFiles[index])) size1 = stat.st_size pygame.time.wait(100) stat = os.stat(str(newFiles[index])) size2 = stat.st_size while size2 > size1: size1 = size2 pygame.time.wait(500) stat = os.stat(str(newFiles[index])) size2 = stat.st_size # procede to load complete file my delay is so long because somehow pygame (or file-writing) runs relatively slow on maemo/nokia770. even a delay of 400 milliseconds was too quick to accommodate the slothly rate of an incoming file. -- http://mail.python.org/mailman/listinfo/python-list
Re: 'error reading datastream' -- loading file only when transfer is complete?
In article <[EMAIL PROTECTED]>, Andrew Robert <[EMAIL PROTECTED]> wrote: >[EMAIL PROTECTED] wrote: >> hello -- >> >> i'm running python/pygame on maemo (nokia 770). my situation is that >> i'm continually scouring this one directory for incoming files. if i >> see if there's a new file (coming in via wireless scp), i proceed to >> load it and process it. >> >> however, i think i am running into the issue that my program starts to >> load the file after it recognises there is new data, but before the >> file has completely transferred, so at unpredictable times i get a >> pygame.error: Error reading from datastream. >> >> what is the easiest way to work out this issue? easy being the key >> word. :) thank you very much! >> >> christine >> > >You might want to test for file locking before attempting to use Or, really crude - when you see the file, record the time and the file size, but don't attempt to process it yet. Wait for a short interval, then check the size again. If it's changed, wait again. When it gives the same size after a delay period, assume all the data is there. This isn't a good method, but it's simple to implement and will reduce the occurrence of attempts to process a file which is still in transit/ -- Jim Segrave ([EMAIL PROTECTED]) -- http://mail.python.org/mailman/listinfo/python-list
Re: 'error reading datastream' -- loading file only when transfer is complete?
thanks - i'm looking, but i found this as well. actually, does this
work?
import os
os.access(file, os.R_OK) # is it readable?
is this valid:
{ i have my file identified }
isFileAccessible = os.access(file, os.R_OK)
while !isFileAccessible:
isFileAccessible = os.access(file, os.R_OK)
and then whenever it's true it can only then proceed to load the file?
thanks, christine
Andrew Robert wrote:
> [EMAIL PROTECTED] wrote:
> > hello --
> >
> > i'm running python/pygame on maemo (nokia 770). my situation is that
> > i'm continually scouring this one directory for incoming files. if i
> > see if there's a new file (coming in via wireless scp), i proceed to
> > load it and process it.
> >
> > however, i think i am running into the issue that my program starts to
> > load the file after it recognises there is new data, but before the
> > file has completely transferred, so at unpredictable times i get a
> > pygame.error: Error reading from datastream.
> >
> > what is the easiest way to work out this issue? easy being the key
> > word. :) thank you very much!
> >
> > christine
> >
>
> You might want to test for file locking before attempting to use
--
http://mail.python.org/mailman/listinfo/python-list
Re: 'error reading datastream' -- loading file only when transfer is complete?
[EMAIL PROTECTED] wrote: > hello -- > > i'm running python/pygame on maemo (nokia 770). my situation is that > i'm continually scouring this one directory for incoming files. if i > see if there's a new file (coming in via wireless scp), i proceed to > load it and process it. > > however, i think i am running into the issue that my program starts to > load the file after it recognises there is new data, but before the > file has completely transferred, so at unpredictable times i get a > pygame.error: Error reading from datastream. > > what is the easiest way to work out this issue? easy being the key > word. :) thank you very much! > > christine > You might want to test for file locking before attempting to use -- http://mail.python.org/mailman/listinfo/python-list
'error reading datastream' -- loading file only when transfer is complete?
hello -- i'm running python/pygame on maemo (nokia 770). my situation is that i'm continually scouring this one directory for incoming files. if i see if there's a new file (coming in via wireless scp), i proceed to load it and process it. however, i think i am running into the issue that my program starts to load the file after it recognises there is new data, but before the file has completely transferred, so at unpredictable times i get a pygame.error: Error reading from datastream. what is the easiest way to work out this issue? easy being the key word. :) thank you very much! christine -- http://mail.python.org/mailman/listinfo/python-list
