BASH->Python (2.6) piping

Question

I need to translate this line of Bash into Python:

sample1=($(/bin/cat /proc/meminfo | egrep 'MemTotal|MemFree|Cached|SwapTotal|SwapFree|AnonPages|Dirty|Writeback|PageTables|HugePages_' | awk ' { print $2} ' | pr -t -T --columns=15 --width=240))

I know I need to use Popen and communicate I just don't know how to rearrange it.

Any help?

Answer 1

You don't need popen - popen is what you use to start a process. We don't need to start another process.

And you don't need to be piping things to/from STDIN/STDOUT ;

/proc/meminfo follows the same rules as everything else in *nix.

• Everything is a file

You can just open /proc/meminfo and process it like you would any other file.

f = open('/proc/meminfo')
for l in f:
    # do stuff with the line from the file

• Create a dictionary of the line items you want
• Find those items (write a function is_interesting(line) or something)
• Do the string processing you need