Guys I want to retrieve a process' affinity list by using subprocess.
try:
pid = 1500
x = subprocess.check_output(['taskset','-c','-p', str(pid)])
except Exception as inst:
print inst
However, this results in the following output:
pid 1500's correct affinity list: 0-3
How do I obtain the 0-3 value as a string directly? There can be only integers or a value like 0-3. Basically I'm trying to get what's after colon ':'.
Thanks in advance.
Just split output on : and use index 1 to get 0-3. Later, You can do anything You want with it. Something like this:
try:
pid = 1500
x = subprocess.check_output(['taskset','-c','-p', str(pid)])
affinity_list = [affinity for affinity in x.split(':')[1].split('-')]
except Exception as inst:
print inst
This will produce:
affinity_list = [0, 3]
If You want to interpret 0-3 as a range, You could do this:
affinity_list = range(affinity_list[0], affinity_list[-1] + 1)
You may do something like print(str(inst).split(':')[1], which gets the string representation of inst, splits it into an array with the delemiter ":" and takes the second value of this array (in your example case, it would be 0-3)
Well, split() is perfect for your case, but if you want to use regex you could do something like:
>>> import re
>>> x = "pid 1500's correct affinity list: 0-3"
>>> y = re.search(':.*$',x).group()[1:]
>>> y
' 0-3'
But again you don't really need regex for this task.
