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I want to get a specific row-column element from string.

import subprocess
process = subprocess.Popen(['free','-m'],stdout=subprocess.PIPE)
out, err = process.communicate()
out = out.decode("utf-8")
print(out)

Output is : 

              total        used        free      shared  buff/cache   available
Mem:           3854        2778         299         351         776         407
Swap:          3909          80        3829

I want to get 3rd row, 3nd column element , that is 80. How can i get that ?

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    split on lines then split lines, pick 3rd element Commented Oct 5, 2017 at 8:07

1 Answer 1

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once decoded, split according to the lines, then pick the interesting line, split using str.split and pick the relevant field. Convert to integer:

output = """              total        used        free      shared  buff/cache   available
Mem:           3854        2778         299         351         776         407
Swap:          3909          80        3829"""

print(int(output.splitlines()[2].split()[2]))

that gives 80 as expected

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