CODEWITHSUNDEEP
python
yunfan
yunfan

Reputation: 800

Synchronous way to enter return key after run command in python?

I want run a command in shell. All of us know we can use the os.system(). But this command must need to be hit enter key to make this command complete.

Now I do it like follow:

 from subprocess import Popen, PIPE
 Popen(my_cmd.split(), stdin=PIPE).stdin.write('\n')

but it is asynchronous. I want to know, is there possible to use os.system() or some simple way to implement it.

Upvotes: 4

Views: 813

Answers (1)

glglgl
glglgl

Reputation: 91119

os.system() is, while not deprecated, seen as superfluous by many people. Everything that can be done with it can be done using subprocess as well.

If you don't like the fact that your program and the other process run concurrently (I think that's what you mean with asynchronous), you could do

from subprocess import Popen, PIPE
sp = Popen(my_cmd.split(), stdin=PIPE)
sp.stdin.write('\n')
sp.wait()

This last .wait() call makes the subprocess call "kind of synchronous".

Upvotes: 2

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