Written a python script to map device with specific host adapter...

!/bin/env python

import glob
import os,sys
import re

if sys.version_info < (2, 6) and sys.version_info < (2, 7):
print "This is not valid version"
sys.exit()

if sys.platform != "linux2":
print "This is not valid OS"
sys.exit()

os.chdir('/sys/block/')

dev_list = ['sd.','mmcblk']

def size(dev):
nr_sectors = open(dev+'/size').read().rstrip('\n')
sect_size = open(dev+'/queue/hw_sector_size').read().rstrip('\n')

# The sect_size is in bytes, so we convert it to GiB and then send it back
return (float(nr_sectors)*float(sect_size))/(1024.0*1024.0*1024.0)

def device_detail():
for dev in glob.glob('/sys/block/sd*'):
vendor_name = open(dev+'/device/vendor','r').read().rstrip('\n')
Read_link = os.readlink(dev).split('/')[4]
print ('Device {0}:: Size {1} GB :: Vendor {2}:: Controller {3}'.format(dev, size (dev), vendor_name, Read_link))

if name =='main':
device_detail()

Start by reviewing the Python script in the issue and its use of Linux /sys/block entries, device links, sector sizes, and vendor data. No repository file or test is named, so first determine where this script belongs and how it should be run. Done should be a working Linux-compatible device-mapping example with its intended output and validation clarified.