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hi

i have a piece of python code extract that calls an external java
program
cmd = """java someclass someargs"""
try:
ret = os.WEXITSTATUS(os.system(cmd))
except:
print blah
else:
dosomething(ret)

the thing is, the java class "someclass" produces it's own errors when
something goes wrong.
something like
java.io.FileNotFoundException: somefile (No such file or directory)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(FileInputStream.jav a:106)
at java.io.FileInputStream.<init>(FileInputStream.jav a:66)
......

how can i supress this error from showing when i execute
../pythonscript.py and at the same time logging it to an errlog file??

thanks

wrote:

> hi
>
> i have a piece of python code extract that calls an external java
> program
> cmd = """java someclass someargs"""
> try:
> ret = os.WEXITSTATUS(os.system(cmd))
> except:
> print blah
> else:
> dosomething(ret)
>
> the thing is, the java class "someclass" produces it's own errors when
> something goes wrong.
> something like
> java.io.FileNotFoundException: somefile (No such file or directory)
> at java.io.FileInputStream.open(Native Method)
> at java.io.FileInputStream.<init>(FileInputStream.jav a:106)
> at java.io.FileInputStream.<init>(FileInputStream.jav a:66)
> ......
>
> how can i supress this error from showing when i execute
> ./pythonscript.py and at the same time logging it to an errlog file??

You probably want to catche the subprocesses stdout/stderr streams. To do
so, use the subprocess module (if you are on python2.4), or the
popen2-module. See the docs for how to use them.

--
Regards,

Diez B. Roggisch