from subprocess import check_output
def get_pid(name):
 return map(int,check_output(["pidof",name]).split())
 
In [21]: get_pid("chrome")
Out[21]:
[27698, 27678, 27665, 27649, 27540, 27530,]

import subprocess<br data-filtered="filtered">def get_process_id(name):
 """Return process ids found by (partial) name or regex.
 
 > get_process_id('kthreadd')
 [2]
 > get_process_id('watchdog')
 [10, 11, 16, 21, 26, 31, 36, 41, 46, 51, 56, 61] # ymmv
 > get_process_id('non-existent process')
 []
 """
 child = subprocess.Popen(['pgrep', '-f', name], stdout=subprocess.PIPE, shell=False)
 response = child.communicate()[0]
 return [int(pid) for pid in response.split()]

#!/usr/bin/env python
 
import os
import sys
 
 
for dirname in os.listdir('/proc'):
 if dirname == 'curproc':
  continue
 
 try:
  with open('/proc/{}/cmdline'.format(dirname), mode='rb') as fd:
   content = fd.read().decode().split('\x00')
 except Exception:
  continue
 
 for i in sys.argv[1:]:
  if i in content[0]:
   print('{0:<12} : {1}'.format(dirname, ' '.join(content)))<br data-filtered="filtered"><br data-filtered="filtered">

phoemur ~/python $ ./pgrep.py bash
1487   : -bash 
1779   : /bin/bash

import os
 
os.getpid()