system in python

To work with the system in Python, you can use the built-in os, subprocess and sys modules. These modules provide functionality to interact with the operating system, execute external commands and manipulate Python interpreter runtime environment.

1. Use the os module to manipulate files and directories, work with environment variables, generate temporary file names, etc. Here's an example of listing all files in a directory:

main.py
import os

for filename in os.listdir('.'):
    print(filename)
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5 lines

2. Use the subprocess module to execute shell commands and capture their output. Here's an example of running ls command and capturing its output:

main.py
import subprocess

result = subprocess.run(['ls', '-l'], stdout=subprocess.PIPE, stderr=subprocess.PIPE)

print(result.stdout.decode())
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6 lines

3. Use the sys module to manipulate Python runtime environment, such as modifying sys.path to add new directories to the import search path. Here's an example of adding a new directory to the sys.path:

main.py
import sys

sys.path.append('/path/to/new/directory')
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4 lines

Overall, Python provides powerful and flexible system-related functionality through its built-in modules.