Displaying console output from subprocess
python, stdout, subprocess
Solution
Use `subprocess.Popen`:
>>> import subprocess
>>> var = subprocess.Popen(['echo', 'hi'], stdout=subprocess.PIPE)
>>> print var.communicate()[0]
hi
>>>
`myfile.txt`:
Hello there,
This is a test with python
Regards,
Me.
Running:
>>> import subprocess
>>> var = subprocess.Popen(['cat', 'myfile.txt'], stdout=subprocess.PIPE)
>>> print var.communicate()[0]
Hello there,
This is a test with python
Regards,
Me.
>>>
Also, you have a little bug. You are checking if the target exists, but you probably want to check if the source exists.
Here is your edited code:
from sys import argv
from os.path import exists
import subprocess
script, source, target = argv
print "Copying from %s to %s" % (source, target)
indata = open(source).read()
if exists(source):
out_file = open(target, 'w')
out_file.write(indata)
out_file.close()
var = subprocess.Popen(["cat", target], stdout=subprocess.PIPE) #how can I get text printed on console by cat?
out = var.communicate()[0]
print out
print "OK."
Problem
I wonder, how can I get the output of subprocess called within Python script? ``` from sys import argv from os.path import exists from subprocess import call script, source, target = argv print "Copying from %s to %s" % (source, target) indata = open(source).read() if exists(target): out_file = open(target, 'w') out_file.write(indata) call(["cat", target]) #how can I get text printed on console by cat? print "OK." out_file.close() ```