Python Question
None in redirected stdout
I have this part of following code:
p = subprocess.Popen(['C:/Python27/python.exe', '-m', 'robot', '-d', logs_directory, input_file], stdout=subprocess.PIPE)
for line in iter(p.stdout.readline, ''):
output = sys.stdout.write(line)
#sys.stdout.write(line)
print "\n\n"
print "************************************************"
print output
print "\n\n"
print "************************************************"
print "\n\n"
But 'output' variable in console shows 'none'
************************************************
None
************************************************
What i am doing wrong here?
Answer
sys.stdout.write(line) does not return a value.
You could write your loop like this:
output = ""
for line in iter(p.stdout.readline, ''):
output += line
sys.stdout.write(line)
imho you can also remove the sys.stdout.write(line) part. But I don't know what you are meant to do with it so...
Source (Stackoverflow)