Re: help needed with subprocess, pipes and parameters
nuffi,
Have you tried running your piped commands
c:\Programs\bob\bob.exe -x -y C:\text\path\to some\file.txt |
c:\Programs\kate\kate.exe -A 2 --dc Print Media Is Dead --da Author
--dt Title --hf Times --bb 14 --aa --font Ariel -
C:\rtf\path\to some\file.rtf
in a single instance of subprocess? Start it up and use the poll method
to wait until the subprocess has terminated. Then open the output file
to get the results.
My recent (and single, hence limited, experience) of using subprocess
indicated that the spawned process may take a little time to start up. Try
bob = subprocess.Popen([bobPath, '-x', '-y', docpath], stdout =
subprocess.PIPE,)
time.sleep( 0.5 ) #experiment with the delay
kate = subprocess.Popen([katePath, A, dc, da, dt, hf, fn, bb, path],
stdin = bob.stdout, stdout = subprocess.PIPE,)
Never looked under the subprocess hood but maybe there's a race
condition with the kate subprocess starting before the bob subprocess
has set up its stdout. It's unlikely but so easy to check with a sleep
between the subprocesses it has to be worth a go.
John
On 13/07/2012 08:34, nuffi wrote:
If I copy and paste the following command into a command window, it does what
I need.
c:\Programs\bob\bob.exe -x -y C:\text\path\to some\file.txt | c:\Programs\kate\kate.exe -A 2 --dc Print Media Is Dead --da Author
--dt Title --hf Times --bb 14 --aa --font Ariel - C:\rtf\path\to some\file.rtf
My mission is to recreate this command within a python script, so that I can
pass a bunch of different parameters into it, and use it as a batch over a
bunch of different papers.
http://docs.python.org/library/subprocess.html seems to be the thing to use in
python 2.7.3. I also checked out
http://www.doughellmann.com/PyMOTW/subprocess/.
My attempts run fine, create destination folders ok and prints done but don't
actually seem to process the file. Is there some way to get subprocess to
output the command it's generating so I can see what I'm doing wrong, rather
than just the output of the command?
How can I chekc that kate's opening the pipe left from bob?Bob may take
some time to execute, will that matter?
The code I came up with looks like this:
import os, glob, subprocess
sourceDir = c:\\text\\
destDir = c:\\rtf\\
bobPath = C:\\Programs\\bob\\bob.exe
katePath = C:\\Programs\\kate\\kate.exe
def get_new_path(doc):
blah = doc.replace(sourceDir, destDir)
if not os.path.isdir(blah):
os.makedirs(blah)
rtf = blah.replace('.txt', '.rtf')
pathString = '- ' + (os.path.join(rtf)) + ''
return(pathString)
def convert_doc(doc):
dc = '--dc Print Media Is Dead'
da = '--da Author'
dt = '--dt Title'
hf = '--hf Times'
fn = '--font Ariel'
bb = '--bb 14'
docpath = '' + (os.path.join(doc)) + ''
path = get_new_path(doc)
A = '-A 2'
bob = subprocess.Popen([bobPath, '-x', '-y', docpath], stdout =
subprocess.PIPE,)
kate = subprocess.Popen([katePath, A, dc, da, dt, hf, fn, bb, path], stdin
= bob.stdout, stdout = subprocess.PIPE,)
end_of_pipe = kate.stdout
#print kate
#subprocess.call(['echo', Test peice of text, '', 'D:\\output.txt'])
for line in end_of_pipe:
print '\t', blah.strip()
#raw_input()
return('done')
test = convert_doc(c:\\text\\path to\\some\\specific text file.txt)
print(blah)
==
Thanks for looking :-)
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Re: help needed with subprocess, pipes and parameters
On Friday, July 13, 2012, nuffi wrote:
If I copy and paste the following command into a command window, it does
what I need.
c:\Programs\bob\bob.exe -x -y C:\text\path\to some\file.txt |
c:\Programs\kate\kate.exe -A 2 --dc Print Media Is Dead --da Author
--dt Title --hf Times --bb 14 --aa --font Ariel -
C:\rtf\path\to some\file.rtf
My mission is to recreate this command within a python script, so that I
can pass a bunch of different parameters into it, and use it as a batch
over a bunch of different papers.
snip
The code I came up with looks like this:
import os, glob, subprocess
sourceDir = c:\\text\\
destDir = c:\\rtf\\
bobPath = C:\\Programs\\bob\\bob.exe
katePath = C:\\Programs\\kate\\kate.exe
def get_new_path(doc):
blah = doc.replace(sourceDir, destDir)
if not os.path.isdir(blah):
os.makedirs(blah)
rtf = blah.replace('.txt', '.rtf')
pathString = '- ' + (os.path.join(rtf)) + ''
return(pathString)
def convert_doc(doc):
dc = '--dc Print Media Is Dead'
da = '--da Author'
dt = '--dt Title'
hf = '--hf Times'
fn = '--font Ariel'
bb = '--bb 14'
docpath = '' + (os.path.join(doc)) + ''
path = get_new_path(doc)
A = '-A 2'
bob = subprocess.Popen([bobPath, '-x', '-y', docpath], stdout =
subprocess.PIPE,)
kate = subprocess.Popen([katePath, A, dc, da, dt, hf, fn, bb, path],
stdin = bob.stdout, stdout = subprocess.PIPE,)
Your tokenization of the command is wrong. Read the Note box in the
subprocess docs for guidance on how to get it right:
http://docs.python.org/library/subprocess.html#popen-constructor
Cheers,
Chris via iPhone
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Cheers,
Chris
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help needed with subprocess, pipes and parameters
If I copy and paste the following command into a command window, it does what
I need.
c:\Programs\bob\bob.exe -x -y C:\text\path\to some\file.txt |
c:\Programs\kate\kate.exe -A 2 --dc Print Media Is Dead --da Author --dt
Title --hf Times --bb 14 --aa --font Ariel - C:\rtf\path\to
some\file.rtf
My mission is to recreate this command within a python script, so that I can
pass a bunch of different parameters into it, and use it as a batch over a
bunch of different papers.
http://docs.python.org/library/subprocess.html seems to be the thing to use in
python 2.7.3. I also checked out
http://www.doughellmann.com/PyMOTW/subprocess/.
My attempts run fine, create destination folders ok and prints done but don't
actually seem to process the file. Is there some way to get subprocess to
output the command it's generating so I can see what I'm doing wrong, rather
than just the output of the command?
How can I chekc that kate's opening the pipe left from bob?Bob may take
some time to execute, will that matter?
The code I came up with looks like this:
import os, glob, subprocess
sourceDir = c:\\text\\
destDir = c:\\rtf\\
bobPath = C:\\Programs\\bob\\bob.exe
katePath = C:\\Programs\\kate\\kate.exe
def get_new_path(doc):
blah = doc.replace(sourceDir, destDir)
if not os.path.isdir(blah):
os.makedirs(blah)
rtf = blah.replace('.txt', '.rtf')
pathString = '- ' + (os.path.join(rtf)) + ''
return(pathString)
def convert_doc(doc):
dc = '--dc Print Media Is Dead'
da = '--da Author'
dt = '--dt Title'
hf = '--hf Times'
fn = '--font Ariel'
bb = '--bb 14'
docpath = '' + (os.path.join(doc)) + ''
path = get_new_path(doc)
A = '-A 2'
bob = subprocess.Popen([bobPath, '-x', '-y', docpath], stdout =
subprocess.PIPE,)
kate = subprocess.Popen([katePath, A, dc, da, dt, hf, fn, bb, path], stdin
= bob.stdout, stdout = subprocess.PIPE,)
end_of_pipe = kate.stdout
#print kate
#subprocess.call(['echo', Test peice of text, '', 'D:\\output.txt'])
for line in end_of_pipe:
print '\t', blah.strip()
#raw_input()
return('done')
test = convert_doc(c:\\text\\path to\\some\\specific text file.txt)
print(blah)
==
Thanks for looking :-)
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