Is it possible to run java from Python in order to create a .png?
Multi tool use
Is it possible to run java from Python in order to create a .png?
I currently have a working java application which from a String renders a .png file. When run from cmd it produces the image in the directory I want. However, when I've tried calling it from Python using
subprocess.call(["java", "-jar", "C:pathtomyjarFilefile.jar",
inputString], shell = True)
no image is created. How can I make it create an image?
Any advice is helpful!
` and
Do you use relative paths in your java programm? Also is the file overwritten from java?
– Lino
Jul 3 at 8:54
add logging to both your python and your java application to help with your debugging.
– Mike Scotty
Jul 3 at 8:57
I'm not familiar with Windows platform but don't you need double
in your path? Such as C:pathtomyjarFilefile.jar?– Sraw
Jul 3 at 9:02
C:pathtomyjarFilefile.jar
I've tried it with both relative and absolute paths and have not had success yet. And is it wrong to have "" in my path? I've used it with Popen and haven't had any issues. And I have `` where Python recommends it. Tried editing it so that I have double backslashes everywhere but did not help unfortunately.
– Isak
Jul 3 at 9:04
1 Answer
1
You could read the process output message to debug it, example code:
inputString = ''
ps = subprocess.Popen(["java", "-jar", "C:pathtomyjarFilefile.jar", inputString],stdout=subprocess.PIPE,stderr=subprocess.STDOUT)
val = ps.stdout.read()
print("val: " + val)
and in my pc, it output error like this:
val: Error: Unable to access jarfile C:path omyjarFileile.jar
Solved it, had some syntax error. Thanks for the help!
– Isak
Jul 3 at 9:20
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Is it a typo or do you have
` and` in your path?– FlyingTeller
Jul 3 at 8:54