Is it possible to start a node.js app from within a python script on a raspberry pi?
On the command line I run sudo node myscript.js
could I use a library like os?
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I don't know about pi but see docs.python.org/2/library/subprocess.html#module-subprocessSelcuk– Selcuk2016-03-04 05:36:22 +00:00Commented Mar 4, 2016 at 5:36
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2 Answers
The first line of file shall be:
#!/usr/bin/python
You can call command with subprocess.call:
from subprocess import call
# Note that you have to specify path to script
call(["node", "path_to_script.js"])
Then you have to set +x permissions for file to be executable:
chmod +x filename.py
Know you are ready to go:
./filename.py
Note: checkout Raspberry Pi Stack Exchange, you can find a lot of use full info there.
As Selcuk mentioned in his comment, use the subprocess module:
#! /usr/bin/env python
import subprocess
subprocess.call('sudo node myscript.js')
It's very likely that you'll encounter a FileNotFoundError when trying to run your command with sudo. If you do, you can try:
#! /usr/bin/env python
import subprocess
subprocess.call('sudo node myscript.js', shell=True)
Per the Python documentation, be VERY careful about using the shell=True parameter as this could be a problem if you allow any arbitrary user input to be passed to subprocess.call().
