Python subprocess.Popen Not finding Executable

Question

I'm having issues with Python finding an available Executable on my Linux machine. My default PATH includes this Executable (svnlook) but when I run the python script the below function fails to find executable. Any ideas on how to fix this?

def command_output(cmd):
    child  = subprocess.Popen(cmd.split(), stdout=subprocess.PIPE)
    output = child.communicate()[0]
    return output, child.returncode


def get_author():
    cmd = "svnlook author %s %s %s" % (svn_opt, svn_txn, svn_repo)
    author, return_code = command_output(cmd)

    return author.strip()

Error:

 Traceback (most recent call last):
  File "/home/user/app/csvn/data/repositories/repo/hooks/pre-commit", line 82, in <module>
    author = get_author()
  File "/home/user/app/csvn/data/repositories/repo/hooks/pre-commit", line 53, in get_author
    author, return_code = command_output(cmd)
  File "/home/user/app/csvn/data/repositories/repo/hooks/pre-commit", line 36, in command_output
    child  = subprocess.Popen(cmd.split(), stdout=subprocess.PIPE)
  File "/home/user/app/activepython-2.7.2.5_x86_64/lib/python2.7/subprocess.py", line 679, in __init__
    errread, errwrite)
  File "/home/user/app/activepython-2.7.2.5_x86_64/lib/python2.7/subprocess.py", line 1228, in _execute_child
    raise child_exception
OSError: [Errno 2] No such file or directory
Error: [Errno 2] No such file or directory

Try printing your sys.path from Python and see if the path is passed to Python correctly. In addition try running the svnlook with it's full path and see if it resolves the issue. I'd also make sure that svnlook is not an alias - which is bash internal and can't be passed to a running program. — immortal
– immortal, Commented Nov 2, 2013 at 8:08

Community · Accepted Answer · 2017-05-23 12:21:54Z

1

You probably want to provide the full path to the executable, e.g. /usr/bin/svnlook or /usr/local/bin/svnlook instead of just svnlook.

See this answer to a related question for details.

edited May 23, 2017 at 12:21

CommunityBot

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answered Nov 2, 2013 at 8:15

Kimvais

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Comments

Dustin Oprea · Accepted Answer · 2013-11-02 08:22:54Z

0

Try running it from the console. Make sure the permissions/executability is correct. Try os.system().

answered Nov 2, 2013 at 8:22

Dustin Oprea

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