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Question
tarifa
hello dear experts on neowin,
How to call an external command in Python: with os.system or with the subprocess-module!?
Imagine i am on Windows and type at the command prompt from within a Python script? can i do this with - the subprocess module in the standard library:
import subprocess subprocess.run(["ls", "-l"])
The official Python-documentation recommends the subprocess module over the alternative os.system():
my question is: which method id more powerful has more advantages - what are the downsides?
a big big advantage from os.system: it passes the command and arguments to our system's shell.
This is very cool - because we can perform multiple commands at the same time; in this manner and set up pipes and input/output redirection.
The advantage of subprocess vs. system is told to be
- more flexible : since we can get the stdout, stderr, the "real" status code, .
- the subprocess module provides more powerful facilities for spawning new processes and retrieving their results;
- and lots of other things more...
to point out one of the advantages of os.system:
- os.system("some_command with args") passes the command and arguments to our system's shell. a very very cool features: we are able to perform multiple commands at the same time. and we can set up pipes and input/output redirection.
Question: which approach do you use - how do you call an external command in Python?
love to hear from you
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