Python try block does not catch os.system exceptions

Question

I have this python code:

import os
try:
  os.system(\'wrongcommand\')
except:
  print(\"command does not work\")

The code prints:

Answer 1

Because os.system() indicates a failure through the exit code of the method

• return value == 0 -> everything ok
• return value != 0 -> some error

The exit code of the called command is directly passed back to Python.

There is documentation telling you that os.system() would raise an exeption in case of a failure. os.system() just calls the underlaying system() call of the OS and returns its return value.

Please read the os.system() documentation carefully.