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Re: Calling Java jar class with parameter from Python
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Peter Otten
Jul 21, 2012, 8:20:48 AM7/21/12
to pytho...@python.org
Jason Veldicott wrote:
> subprocess.Popen(["C:\\Program Files
> (x86)\\Java\\jdk1.7.0_05\\bin\\java.exe", "-cp
> c:\\antlr\\antlr-3.4-complete.jar org.antlr.Tool",
> "C:\\Users\\Jason\\Documents\\antlr\\java grammar\\Java.g"],
> stdout=subprocess.PIPE, shell=True ).communicate()
>
>
> Obviously, some trick is being missed. Could anyone shed light on what it
> may be?
File names with spaces can be tricky. Try thoroughly separating the
individual arguments and let subprocess do the necessary escaping.
I think it should be
subprocess.Popen([
"C:\\Program Files (x86)\\Java\\jdk1.7.0_05\\bin\\java.exe",
"-cp",
"C:\\antlr\\antlr-3.4-complete.jar",
"org.antlr.Tool",
"C:\\Users\\Jason\\Documents\\antlr\\java grammar\\Java.g"],
stdout=subprocess.PIPE).communicate()
> subprocess.Popen(["C:\\Program Files
> (x86)\\Java\\jdk1.7.0_05\\bin\\java.exe", "-cp
> c:\\antlr\\antlr-3.4-complete.jar org.antlr.Tool",
> "C:\\Users\\Jason\\Documents\\antlr\\java grammar\\Java.g"],
> stdout=subprocess.PIPE, shell=True ).communicate()
>
>
> Obviously, some trick is being missed. Could anyone shed light on what it
> may be?
File names with spaces can be tricky. Try thoroughly separating the
individual arguments and let subprocess do the necessary escaping.
I think it should be
subprocess.Popen([
"C:\\Program Files (x86)\\Java\\jdk1.7.0_05\\bin\\java.exe",
"-cp",
"C:\\antlr\\antlr-3.4-complete.jar",
"org.antlr.Tool",
"C:\\Users\\Jason\\Documents\\antlr\\java grammar\\Java.g"],
stdout=subprocess.PIPE).communicate()
Roy Smith
Jul 21, 2012, 9:57:48 AM7/21/12
to
In article <mailman.2380.1342873...@python.org>,
Peter's version, but easier to read:
subprocess.Popen([
r"C:\Program Files (x86)\Java\jdk1.7.0_05\bin\java.exe",
r"-cp",
r"C:\antlr\antlr-3.4-complete.jar",
r"org.antlr.Tool",
r"C:\Users\Jason\Documents\antlr\java grammar\Java.g"],
stdout=subprocess.PIPE).communicate()
although I would probably refactor it like:
args = [r"C:\Program Files (x86)\Java\jdk1.7.0_05\bin\java.exe",
r"-cp",
r"C:\antlr\antlr-3.4-complete.jar",
r"org.antlr.Tool",
r"C:\Users\Jason\Documents\antlr\java grammar\Java.g",
]
proc = subprocess.Popen(args, stdout=subprocess.PIPE)
proc.communicate()
Peter Otten <__pet...@web.de> wrote:
> subprocess.Popen([
> "C:\\Program Files (x86)\\Java\\jdk1.7.0_05\\bin\\java.exe",
> subprocess.Popen([
> "C:\\Program Files (x86)\\Java\\jdk1.7.0_05\\bin\\java.exe",
> "-cp",
> "C:\\antlr\\antlr-3.4-complete.jar",
> "org.antlr.Tool",
> "C:\\Users\\Jason\\Documents\\antlr\\java grammar\\Java.g"],
> stdout=subprocess.PIPE).communicate()
You might also want to try raw strings. This should be identical to
> "C:\\antlr\\antlr-3.4-complete.jar",
> "org.antlr.Tool",
> "C:\\Users\\Jason\\Documents\\antlr\\java grammar\\Java.g"],
> stdout=subprocess.PIPE).communicate()
Peter's version, but easier to read:
subprocess.Popen([
r"C:\Program Files (x86)\Java\jdk1.7.0_05\bin\java.exe",
r"-cp",
r"C:\antlr\antlr-3.4-complete.jar",
r"org.antlr.Tool",
r"C:\Users\Jason\Documents\antlr\java grammar\Java.g"],
stdout=subprocess.PIPE).communicate()
although I would probably refactor it like:
args = [r"C:\Program Files (x86)\Java\jdk1.7.0_05\bin\java.exe",
r"-cp",
r"C:\antlr\antlr-3.4-complete.jar",
r"org.antlr.Tool",
r"C:\Users\Jason\Documents\antlr\java grammar\Java.g",
]
proc = subprocess.Popen(args, stdout=subprocess.PIPE)
proc.communicate()
jasonve...@gmail.com
Jul 21, 2012, 12:03:57 PM7/21/12
to comp.lan...@googlegroups.com, pytho...@python.org
On Saturday, July 21, 2012 5:20:48 AM UTC-7, Peter Otten wrote:
> Jason Veldicott wrote:
>
> > subprocess.Popen(["C:\\Program Files
> > (x86)\\Java\\jdk1.7.0_05\\bin\\java.exe", "-cp
> > c:\\antlr\\antlr-3.4-complete.jar org.antlr.Tool",
> > "C:\\Users\\Jason\\Documents\\antlr\\java grammar\\Java.g"],
> > stdout=subprocess.PIPE, shell=True ).communicate()
> >
> >
> > Obviously, some trick is being missed. Could anyone shed light on what it
> > may be?
> "-cp",
> "C:\\antlr\\antlr-3.4-complete.jar",
> "org.antlr.Tool",
> "C:\\Users\\Jason\\Documents\\antlr\\java grammar\\Java.g"],
> stdout=subprocess.PIPE).communicate()
That did the trick, thanks.
I had the impression from another post that the breaking up of command strings into subprocess arguments could be done arbitrarily as needed to deal with nested inverted commas. Obviously as you've shown, this is not the case, at least for Popen.
> Jason Veldicott wrote:
>
> > subprocess.Popen(["C:\\Program Files
> > (x86)\\Java\\jdk1.7.0_05\\bin\\java.exe", "-cp
> > c:\\antlr\\antlr-3.4-complete.jar org.antlr.Tool",
> > "C:\\Users\\Jason\\Documents\\antlr\\java grammar\\Java.g"],
> > stdout=subprocess.PIPE, shell=True ).communicate()
> >
> >
> > Obviously, some trick is being missed. Could anyone shed light on what it
> > may be?
>
> File names with spaces can be tricky. Try thoroughly separating the
> individual arguments and let subprocess do the necessary escaping.
> I think it should be
>
> subprocess.Popen([
> "C:\\Program Files (x86)\\Java\\jdk1.7.0_05\\bin\\java.exe",
> File names with spaces can be tricky. Try thoroughly separating the
> individual arguments and let subprocess do the necessary escaping.
> I think it should be
>
> subprocess.Popen([
> "-cp",
> "C:\\antlr\\antlr-3.4-complete.jar",
> "org.antlr.Tool",
> "C:\\Users\\Jason\\Documents\\antlr\\java grammar\\Java.g"],
> stdout=subprocess.PIPE).communicate()
That did the trick, thanks.
I had the impression from another post that the breaking up of command strings into subprocess arguments could be done arbitrarily as needed to deal with nested inverted commas. Obviously as you've shown, this is not the case, at least for Popen.
jasonve...@gmail.com
Jul 21, 2012, 12:03:57 PM7/21/12
to pytho...@python.org
On Saturday, July 21, 2012 5:20:48 AM UTC-7, Peter Otten wrote:
> Jason Veldicott wrote:
>
> > subprocess.Popen(["C:\\Program Files
> > (x86)\\Java\\jdk1.7.0_05\\bin\\java.exe", "-cp
> > c:\\antlr\\antlr-3.4-complete.jar org.antlr.Tool",
> > "C:\\Users\\Jason\\Documents\\antlr\\java grammar\\Java.g"],
> > stdout=subprocess.PIPE, shell=True ).communicate()
> >
> >
> > Obviously, some trick is being missed. Could anyone shed light on what it
> Jason Veldicott wrote:
>
> > subprocess.Popen(["C:\\Program Files
> > (x86)\\Java\\jdk1.7.0_05\\bin\\java.exe", "-cp
> > c:\\antlr\\antlr-3.4-complete.jar org.antlr.Tool",
> > "C:\\Users\\Jason\\Documents\\antlr\\java grammar\\Java.g"],
> > stdout=subprocess.PIPE, shell=True ).communicate()
> >
> >
> > may be?
>
> File names with spaces can be tricky. Try thoroughly separating the
> individual arguments and let subprocess do the necessary escaping.
> I think it should be
>
> subprocess.Popen([
> File names with spaces can be tricky. Try thoroughly separating the
> individual arguments and let subprocess do the necessary escaping.
> I think it should be
>
> subprocess.Popen([
jasonve...@gmail.com
Jul 21, 2012, 12:11:18 PM7/21/12
to
On Saturday, July 21, 2012 6:57:48 AM UTC-7, Roy Smith wrote:
> In article <mailman.2380.1342873...@python.org>,
> Peter Otten <__pe...@web.de> wrote:
>
> > subprocess.Popen([
> > "C:\\Program Files (x86)\\Java\\jdk1.7.0_05\\bin\\java.exe",
> > "-cp",
> > "C:\\antlr\\antlr-3.4-complete.jar",
> > "org.antlr.Tool",
> > "C:\\Users\\Jason\\Documents\\antlr\\java grammar\\Java.g"],
> > stdout=subprocess.PIPE).communicate()
>
> subprocess.Popen([
> r"C:\Program Files (x86)\Java\jdk1.7.0_05\bin\java.exe",
> r"-cp",
> r"C:\antlr\antlr-3.4-complete.jar",
> r"org.antlr.Tool",
> r"C:\Users\Jason\Documents\antlr\java grammar\Java.g"],
> r"-cp",
> r"C:\antlr\antlr-3.4-complete.jar",
> r"org.antlr.Tool",
> r"C:\Users\Jason\Documents\antlr\java grammar\Java.g",
Visually the separate array to handle arguments is perhaps cleaner, having more resemblance to the original command.
Thanks for the tips.
> In article <mailman.2380.1342873...@python.org>,
> Peter Otten <__pe...@web.de> wrote:
>
> > subprocess.Popen([
> > "C:\\Program Files (x86)\\Java\\jdk1.7.0_05\\bin\\java.exe",
> > "-cp",
> > "C:\\antlr\\antlr-3.4-complete.jar",
> > "org.antlr.Tool",
> > "C:\\Users\\Jason\\Documents\\antlr\\java grammar\\Java.g"],
> > stdout=subprocess.PIPE).communicate()
>
> You might also want to try raw strings. This should be identical to
> Peter's version, but easier to read:
> You might also want to try raw strings. This should be identical to
>
> subprocess.Popen([
> r"C:\Program Files (x86)\Java\jdk1.7.0_05\bin\java.exe",
> r"-cp",
> r"C:\antlr\antlr-3.4-complete.jar",
> r"org.antlr.Tool",
> r"C:\Users\Jason\Documents\antlr\java grammar\Java.g"],
> stdout=subprocess.PIPE).communicate()
>
> although I would probably refactor it like:
>
> args = [r"C:\Program Files (x86)\Java\jdk1.7.0_05\bin\java.exe",
>
> although I would probably refactor it like:
>
> r"-cp",
> r"C:\antlr\antlr-3.4-complete.jar",
> r"org.antlr.Tool",
> r"C:\Users\Jason\Documents\antlr\java grammar\Java.g",
> ]
> proc = subprocess.Popen(args, stdout=subprocess.PIPE)
> proc.communicate()
The r string notation at least saves having to double type a bunch of backslashes, although the appearance prepended to the string takes a little getting used to.
> proc = subprocess.Popen(args, stdout=subprocess.PIPE)
> proc.communicate()
Visually the separate array to handle arguments is perhaps cleaner, having more resemblance to the original command.
Thanks for the tips.
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