Launch a shell command with in a python script wait for the termination and return to the script

Question

I ve a python script that has to launch a shell command for every file in a dir   import os  files   os listdir      for f in files      os execlp  myscript    myscript   f    This works fine for the first file  but after the  myscript  command has ended  the execution stops and does not come back to the python script   How can I do  Do I have to fork   before calling os execlp

User · Answer

this worked for me fine   shell command    ls -l  subprocess call shell command split

User · Answer

You can use subprocess Popen   There s a few ways to do it   import subprocess cmd      run myscript    --arg    value   p   subprocess Popen cmd  stdout subprocess PIPE  for line in p stdout      print line p wait   print p returncode   Or  if you don t care what the external program actually does   cmd      run myscript    --arg    value   subprocess Popen cmd  wait

User · Answer

You can use subprocess Popen   There s a few ways to do it   import subprocess cmd      run myscript    --arg    value   p   subprocess Popen cmd  stdout subprocess PIPE  for line in p stdout      print line p wait   print p returncode   Or  if you don t care what the external program actually does   cmd      run myscript    --arg    value   subprocess Popen cmd  wait

User · Answer

The os exec    functions replace the current programm with the new one  When this programm ends so does your process  You probably want os system

User · Answer

The os exec    functions replace the current programm with the new one  When this programm ends so does your process  You probably want os system

User · Answer

The subprocess module has come along way since 2008   In particular check call and check output make simple subprocess stuff even easier   The check   family of functions are nice it that they raise an exception if something goes wrong   import os import subprocess  files   os listdir      for f in files     subprocess check call     myscript   f       Any output generated by myscript will display as though your process produced the output  technically myscript and your python script share the same stdout    There are a couple of ways to avoid this    check call     myscript   f    stdout subprocess PIPE   The stdout will be supressed  beware if myscript produces more that 4k of output    stderr will still be shown unless you add the option stderr subprocess PIPE  check output     myscript   f     check output returns the stdout as a string so it isnt shown   stderr is still shown unless you add the option stderr subprocess STDOUT

User · Answer

use spawn  import os os spawnlp os P WAIT   cp    cp    index html     dev null

User · Answer

subprocess  The subprocess module   allows you to spawn new processes    connect to their input output error   pipes  and obtain their return codes    http   docs python org library subprocess html  Usage   import subprocess process   subprocess Popen command  shell True  stdout subprocess PIPE  process wait   print process returncode

User · Answer

The os exec    functions replace the current programm with the new one  When this programm ends so does your process  You probably want os system

User · Answer

use spawn  import os os spawnlp os P WAIT   cp    cp    index html     dev null

User · Answer

The os exec    functions replace the current programm with the new one  When this programm ends so does your process  You probably want os system

User · Answer

You can use subprocess Popen   There s a few ways to do it   import subprocess cmd      run myscript    --arg    value   p   subprocess Popen cmd  stdout subprocess PIPE  for line in p stdout      print line p wait   print p returncode   Or  if you don t care what the external program actually does   cmd      run myscript    --arg    value   subprocess Popen cmd  wait

User · Answer

subprocess  The subprocess module   allows you to spawn new processes    connect to their input output error   pipes  and obtain their return codes    http   docs python org library subprocess html  Usage   import subprocess process   subprocess Popen command  shell True  stdout subprocess PIPE  process wait   print process returncode

User · Answer

subprocess  The subprocess module   allows you to spawn new processes    connect to their input output error   pipes  and obtain their return codes    http   docs python org library subprocess html  Usage   import subprocess process   subprocess Popen command  shell True  stdout subprocess PIPE  process wait   print process returncode

User · Answer

I use os system  import os os system  pdftoppm -png        format path2pdf  os path join tmpdirname   temp

User · Answer

I use os system  import os os system  pdftoppm -png        format path2pdf  os path join tmpdirname   temp

User · Answer

You can use subprocess Popen   There s a few ways to do it   import subprocess cmd      run myscript    --arg    value   p   subprocess Popen cmd  stdout subprocess PIPE  for line in p stdout      print line p wait   print p returncode   Or  if you don t care what the external program actually does   cmd      run myscript    --arg    value   subprocess Popen cmd  wait

User · Answer

use spawn  import os os spawnlp os P WAIT   cp    cp    index html     dev null

User · Answer

use spawn  import os os spawnlp os P WAIT   cp    cp    index html     dev null

User · Answer

The subprocess module has come along way since 2008   In particular check call and check output make simple subprocess stuff even easier   The check   family of functions are nice it that they raise an exception if something goes wrong   import os import subprocess  files   os listdir      for f in files     subprocess check call     myscript   f       Any output generated by myscript will display as though your process produced the output  technically myscript and your python script share the same stdout    There are a couple of ways to avoid this    check call     myscript   f    stdout subprocess PIPE   The stdout will be supressed  beware if myscript produces more that 4k of output    stderr will still be shown unless you add the option stderr subprocess PIPE  check output     myscript   f     check output returns the stdout as a string so it isnt shown   stderr is still shown unless you add the option stderr subprocess STDOUT

User · Answer

subprocess  The subprocess module   allows you to spawn new processes    connect to their input output error   pipes  and obtain their return codes    http   docs python org library subprocess html  Usage   import subprocess process   subprocess Popen command  shell True  stdout subprocess PIPE  process wait   print process returncode

User · Answer

this worked for me fine   shell command    ls -l  subprocess call shell command split

[python] Launch a shell command with in a python script, wait for the termination and return to the script

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