Please follow standard guideline while writting the code

[Samrat-Revagade]

I observed that you have written code like class assignments no meaningful names to variables, functions , no sufficient comments in the code

have a look at the small piece of code in file_loc.py file:

import subprocess
import re
import operator
import sys
ljust_val = 40 -------- > what is ljust_val ?
kd = 3 -------- > what does kd mean, same apples for all the below code ?
PostgresPath = sys.argv[1]
def get_disk_list():
d = {}
f = open("os.conf","r")
file = f.readlines()
f.close()
flag = 0
disk_list = []
for line in file:
if "Disks and partitions" in line:
flag = 1
elif flag == 1:
flag =2
elif flag == 2 and "----" not in line and line != "\n":
if "File System information" in line:
break
if "Disk" in line:
disk_list.append(line.split(' ')[0])
return disk_list

Improvement points:
Python is very powerful dynamic programming language when you write a code in it, it should have meaning

while naming functions and variables use following rule:
lowercase with words separated by underscores as necessary to improve readability.

Have a look at this link from pythons official site:
http://legacy.python.org/dev/peps/pep-0008/