How to run different processes in a pool of 5

[lravikumarvsp]

Hi,

I had a python script which executes different processes in parallel.
How can I modify this script so that it can run the parallel processes in a pool of 5 at a time?
Please help

from multiprocessing import Pool
from multiprocessing import Process
import glob
import os
import csv
from threading import Thread
from multiprocessing import Pool as ThreadPool
import time
import multiprocessing
patterns = ['ACM','ACX','AW','BC','XU0', 'DRM', 'DHD', 'CR', 'GSK', 'DMS', 'BLS']
	
def process(pattern=[]):
	
	base_path = '/ai2/data/dev/admin/inf/*{}*'
	print("ID of process: {}".format(os.getpid()))
	print "Name of the process is :" ,pattern
	
	

	search_path =  base_path.format(pattern)
	for f in glob.glob(search_path):
		print("-----------------------")
		print ("The directory path is:")
		print f
		print("List of files in the directory are:")
		os.chdir('/ai2/data/dev/admin/inf/')
		os.chdir(f)
		cwd = os.getcwd()
		for subdir, dirs, files in os.walk(cwd, topdown=True):
			for file23 in glob.glob('*.err'):
				print file23	
if __name__ == "__main__":  # confirms that the code is under main function
	patterns = ['ACM','ACX','AW','BC','XU0', 'DRM', 'DHD', 'CR', 'GSK', 'DMS', 'BLS']
	procs = []
	#proc = Process(target=process)  # instantiating without any argument
	#procs.append(proc)
	#proc.start()
	
    # instantiating process with arguments
	for pattern in patterns:
		#print(name)
		proc = Process(target=process,args=(pattern,))
		procs.append(proc)
		proc.start()
	

Output:
ID of process: 5789
Name of the process is : ACM
-----------------------
The directory path is:
/ai2/data/dev/admin/inf/inf_ACM_pvt
List of files in the directory are:
dsplit.err
ID of process: 5793
Name of the process is : XU0
-----------------------
The directory path is:
/ai2/data/dev/admin/inf/inf_XU0_pvt
List of files in the directory are:
t_itm.err
ID of process: 5791
Name of the process is : AW
-----------------------
The directory path is:
/ai2/data/dev/admin/inf/inf_AW_pvt
List of files in the directory are:
aware.err
ID of process: 5796
Name of the process is : CR
-----------------------
The directory path is:
/ai2/data/dev/admin/inf/inf_CR_pvt
List of files in the directory are:
issue.err
ID of process: 5792
Name of the process is : BC
-----------------------
The directory path is:
/ai2/data/dev/admin/inf/inf_BC_pvt
List of files in the directory are:
run_ingest_BC_daily_1249.err
ID of process: 5797
Name of the process is : GSK
-----------------------
The directory path is:
/ai2/data/dev/admin/inf/inf_GSK_pvt
List of files in the directory are:
gs_attribute.err
ID of process: 5790
Name of the process is : ACX
-----------------------
The directory path is:
/ai2/data/dev/admin/inf/inf_ACX_pvt
List of files in the directory are:
accountshighfocus.err
acm_access_log.err
ID of process: 5795
Name of the process is : DHD
-----------------------
The directory path is:
/ai2/data/dev/admin/inf/inf_DHD_pvt
List of files in the directory are:
retpaid.err
ID of process: 5794
Name of the process is : DRM
-----------------------
The directory path is:
/ai2/data/dev/admin/inf/inf_DRM_pvt
List of files in the directory are:
call_report_y9clookup.err
ID of process: 5798
Name of the process is : DMS
-----------------------
The directory path is:
/ai2/data/dev/admin/inf/inf_DMS_pvt
List of files in the directory are:
run_ingest_DMS_daily_1235.err
ID of process: 5799
Name of the process is : BLS
-----------------------
The directory path is:
/ai2/data/dev/admin/inf/inf_BLS_pvt
List of files in the directory are:
run_ingest_BLS_daily_1241.err