On Jan 1, 7:43 pm, MRAB <pyt...@mrabarnett.plus.com> wrote: > On 02/01/2012 03:14, David Goldsmith wrote: > > > > > > > > > > > On Jan 1, 7:05 am, Tim Golden<m...@timgolden.me.uk> wrote: > >> On 01/01/2012 12:05, David Goldsmith wrote: > >> >> ie can the Python process creating the directories, > > >> > Yes. > > >> >> and a subprocess called from it create a simple file? > > >> > No. > > >> >> Depending on where you are in the filesystem, it may indeed > >> >> be necessary to be running as administrator. But don't try > >> >> to crack every security nut with an elevated sledgehammer. > > >> > If you mean running as admin., those were my sentiments exactly. So, > >> > there isn't something specific I should be doing to assure that my > >> > subproceses can write to directories? > > >> In the general case, no. By default, a subprocess will have > >> the same security context as its parent. The exception is > >> where the parent (the Python processing invoking subprocess.call > >> in this example) is already impersonating a different user; > >> in that case, the subprocess will inherit its grandparent's > >> context. > > >> But unless you're doing something very deliberate here then > >> I doubt if that's biting you. > > >> Can I ask: are you absolutely certain that the processes > >> you're calling are doing what you think they are and failing > >> where you think they're failing? > > >> TJG > > > I'm a mathematician: the only thing I'm absolutely certain of is > > nothing. > > > Here's my script, in case that helps: > > > import os > > import sys > > import stat > > import os.path as op > > import subprocess as sub > > from os import remove > > from os import listdir as ls > > from os import makedirs as mkdir > > > def doFlac2Mp3(arg, d, fl): > > if '.flac' in [f[-5:] for f in fl]: > > newD = d.replace('FLACS', 'MP3s') > > mkdir(newD) > > for f in fl: > > if f[-5:]=='.flac': > > root = f.replace('.flac', '') > > cmd = ['"C:\\Program Files (x86)\\aTunes\\win_tools\ > > \flac.exe" -d ' + > > '--output-prefix=' + newD + '\\', f] > > res = sub.call(cmd)#, env={'PATH': os.defpath}) > > if not res: > > cmd = ['"C:\\Program Files (x86)\\aTunes\\win_tools > > \\lame.exe" -h', > > newD + root + '.wav', newD + root + > > '.mp3'] > > res = sub.call(cmd)#, env={'PATH': os.defpath}) > > if not res: > > rf = newD + root + '.wav' > > remove(rf) > > > top=sys.argv[1] > > op.walk(top, doFlac2Mp3, None) > > I think that if the command line should be something like: > > "C:\Program Files (x86)\aTunes\win_tools\flac.exe" -d > --output-prefix=FOO\ BAR > > then the cmd should be something like: > > cmd = ['C:\\Program Files (x86)\\aTunes\\win_tools\\flac.exe', '-d', > '--output-prefix="' + newD + '\\"', f]
Thanks again all! MRAB: your advice was sufficient to get me over the hump, so to speak, thanks for chiming in! -- http://mail.python.org/mailman/listinfo/python-list