'consider-using-with' code quality suggestion from VS Code using subprocess module

Question

I used subprocess.popen as follows. The following linter suggestion occurs in vscode

try:
            p = subprocess.Popen(
                ["python", "app.py"]
            )
except:
            traceback.print_exc()

Consider using 'with' for resource-allocating operationspylint(consider-using-with)

But I don't know where to use 'with'

That's not an error. It's a suggestion. – hobbs Jun 29 '21 at 01:28 — hobbs, Jun 29 '21 at 01:28
Where do you put 'with' to accept the suggestion? – kwsong0314 Jun 29 '21 at 01:29 — kwsong0314, Jun 29 '21 at 01:29

score 2 · Accepted Answer · answered Jun 29 '21 at 01:30

Use with to assign the variable from subprocess.popen().

try:
    with subprocess.Popen(['python', 'app.py']) as p:
        # code here
except:
    traceback.print_exc()

Note that the try/except will also catch exceptions in the body of with. See this answer for how you can structure the code to just catch an exception from subprocess.Popen().

'consider-using-with' code quality suggestion from VS Code using subprocess module

1 Answers1