invoking python compiler from within java

Question

I'm trying to run a Python program from within Java using the following statement

Process p = Runtime.getRuntime().exec("python " + file);

Where file is a string "c:\user\test.py"

It throws me an exception

Caused by: java.io.IOException: CreateProcess error=2, The system cannot find the file specified

I made sure my system variable has an entry pointing to my python home directory.

please help

what happens if you type "python c:\user\test.py" in the cmd, while not being at that location? — Mohsen Kamrani, Apr 20 '14 at 08:31
Works for me, for some reason, it can't seem to find your file. Try `System.out.println((new File("C:\\users\\chaitu\\desktop\\test.py").exists()))` For debug reasons — Flyingfirepig, Apr 20 '14 at 08:55
Hmm, getting more and more puzzling... Try replacing the word "python " with the string to your python exe, eg "C:\\Python33\\python.exe "? And are you running the latest Java version? — Flyingfirepig, Apr 20 '14 at 09:07
Bingo ! it did work giving the path !! thanks a ton literally spent the whole day with it !! thanks — user2707760, Apr 20 '14 at 09:11

score 0 · Accepted Answer · answered Apr 20 '14 at 09:34

Just posting this for future reference (And so the question can be marked solved), the problem was for some reason, Java didn't like that you were trying to run python by calling it python, and it wanted you to do

Process p = Runtime.getRuntime().exec("Path\\To\\Python.exe " + file);

invoking python compiler from within java

1 Answers1