subprocess.popen question

[Eric_Dexter at msn.com]

On Jun 21, 1:22 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
wrote:
> En Wed, 20 Jun 2007 22:28:06 -0300, Eric_Dex... at msn.com  
> <Eric_Dex... at msn.com> escribió:
>
>
>
>
>
> > On Jun 20, 7:50 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> > wrote:
> >> En Wed, 20 Jun 2007 20:02:52 -0300, Eric_Dex... at msn.com
> >> <Eric_Dex... at msn.com> escribió:
> >> > On Jun 20, 1:46 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> >> > wrote:
>
> >> >> cmd = ["gawk", "-f", "altertime.awk", "-v", "time_offset=4", "-v",
> >> >> "outfile=testdat.sco", "i1.sco"]
> >> >> Now, what do you want to do with the output? Printing it line by  
> >> line?
> >> >> output = subprocess.Popen(cmd,  
> >> stdout=subprocess.PIPE).communicate()[0]
> >> >> lines = output.splitlines()
> >> >> for line in lines:
> >> >>    print line
>
> >> >  C:\dex_tracker\pipe1.py
> >> > Traceback (most recent call last):
> >> >  File "C:\dex_tracker\pipe1.py", line 14, in
> >> > last_line = subprocess.Popen([cmd],
> >> > stdout=subprocess.PIPE).communicate()[0]
> >> >  File "C:\Python25\lib\subprocess.py", line 593, in __init__
> >> > errread, errwrite)
> >> >  File "C:\Python25\lib\subprocess.py", line 793, in _execute_child
> >> > startupinfo)
> >> > WindowsError: [Error 2] The system cannot find the file specified
> >> > Script terminated.
>
> >> > I can write it out as a batch file and then run it but that is a messy
> >> > hack..
>
> >> If cmd is a list of arguments, like the example above, you should use
> >> subprocess.Popen(cmd,...) (like the example above, too).
>
> > I had cut and pasted the example in to get that error...  could it be
> > a problem with ms windows??? (I am at a library computer befour work
> > so that ended my testing)
>
> Note the call to subprocess.Popen- is the first argument [cmd] or cmd?
> What do you get with print repr(cmd)?
> Do you have gawk installed on that machine too?
>
> --
> Gabriel Genellina- Hide quoted text -
>
> - Show quoted text -

gawk is installed..  I do fine when I just call gawk I get all the
options to use with it but the minute I try to use the options with it
I have problems.  I have done it with batch files but then I would
have to write out a batch file and then run the batch file.  seems
like more work than I should have to do to use options with a command
line program..  I have done this in other cases with os.startfile and
other cases and would like to fix it.