Parses process statistics from /proc into JSON for a given PID

proc_parse.py

#!/usr/bin/python3

import os
import sys
import json


def parse_proc():
    values = {}

    PID = sys.argv[1] if len(sys.argv) > 1 else os.getpid()

    values['PID'] = PID

    with open(os.path.join('/proc', str(PID), 'cmdline'), 'r') as f:
        cmdline = f.read()[:-1].replace('\0', ' ')

    values['cmdline'] = cmdline

    with open(os.path.join('/proc', str(PID), 'net/netstat'), 'r') as f:
        netstat = f.read().split('\n')[:-1]

    values['netstat'] = {}

    for i in range(0, len(netstat), 2):
        key = netstat[i].split(':')[0]
        values['netstat'][key] = dict(zip(netstat[i].split(' ')[1:],
                                          netstat[i+1].split(' ')[1:]))

    with open(os.path.join('/proc', str(PID), 'status'), 'r') as f:
        status = f.read().split('\n')[:-1]

    values['status'] = {}

    for i in range(0, len(status)):
        key, val = status[i].split(':')
        values['status'][key] = val.replace('\t', ' ').lstrip()

    with open(os.path.join(os.getcwd(),
                           'pid_' + str(PID) + '_procinfo.json'), 'w') as f:
        json.dump(values, f, indent=4, sort_keys=True)


if __name__ == '__main__':
    parse_proc()