How can I sent input to another program using python using subprocess [duplicate]

Question

I want to send some inputs to a cmd based programme using python. The program takes normally type inputs from keyboard.

I tried as:

P1=subprocess.Popen("my_program",stdin=subprocess.PIPE,stdout=subprocess.PIPE,sterr=subprocess.PIPE)
p1out,p1err=P1.communicate(input="my_input")

But gave error as "it requires byte like object not str". I had also tried with P1.stdin.write() method and gave same error again. What should be my input dtype?

you may need to pass arg encoding='utf-8' when you call Popen — Cologler
– Cologler, Commented Apr 17, 2019 at 13:15

Ido_f · Accepted Answer · 2019-04-17 07:36:39Z

2

It seems like all you have to change is your string to a 'bytes' type.

type("my_input")
>>>> str
type(b'my_input')
>>>> bytes

answered Apr 17, 2019 at 7:36

Ido_f

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Comments

scorp · Accepted Answer · 2019-04-18 06:20:19Z

0

I solved using

my_input=my_input.encode("utf-8")

answered Apr 18, 2019 at 6:20

scorp

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