从 Python 运行文本并将其传送到 a.exe 文件中

Question

I am trying to a run a.exe file from python and pipe a string into it. The.exe itself opens a command box and requires a series of string inputs that can be entered in one go on a series of lines (as below)

In bash the solution would be:

printf "test.dat\nMoreinput\nMoreinput"  | ~/Desktop/Median_filt_exes/ascxyz.exe

To recreate this in python I have tried:

from subprocess import Popen, PIPE
p = Popen(r"./ascxyz.exe", stdin=PIPE,text=True)
p.communicate("test.dat\nMoreinput/nMoreinput")

There's no error however it doesn't seem to be working (the.exe should create a new file when run successfully). Any help into what I could do to figure out why the exe isnt running properly would be very appreciated!

Answer 1

The immediate problem is probably that you are not terminating the input with a newline. But you really also don't want to do the Popen plumbing yourself.

from subprocess import run
run(['./ascxyz.exe'], text=True,
  input="test.dat\nMoreInput\nMoreInput\n")

Notice also how we pass in a list as the first argument, to avoid the complications of shell=True .