Strange problem related to "python service"

[Pavel_47]

Hello,

I faced to a quite strange problem: if my python program is started as service certain commands aren't executed correctly whereas if I start it in python environment the same commands executed correctly.
For example if the following command

bbb = os.popen('ls').read()

is executed in python environment, in bbb variable there is content of current directory
In the case of launching as service the bbb variable is empty.
Any comments ?
Thanks.

[Pavel_47]

Resolved.
If program is used as a service, the full path to linux command must be specified, i.e. instead of

bbb = os.popen('ls').read()

do

bbb = os.popen('/bin/ls').read()