How python can execute shell command with env

Question

Basically, os.system() can execute shall commands, such as:

os.system("echo $A")

It will work well and output value environment variable A.

But this seems to not work:

os.system("A=b echo $A")

It won't output "b" as expected.

How Python can execute this type of command command?

"A=b; echo $A" seems to work – hilberts_drinking_problem Nov 12 '22 at 03:14 — hilberts_drinking_problem, Nov 12 '22 at 03:14

score 0 · Answer 1 · answered Nov 12 '22 at 03:23

0

It won't output "b" as expected.

The expansion $A to empty string is done by the shell earlier, before running echo.

Try this:

os.system("A=b; echo $A")

answered Nov 12 '22 at 03:23

ramsay

1 Answers1