#!/usr/bin/python2

import os

def getmountpoint(device):
    mtab = open("/etc/mtab", "r")
    for line in mtab.readlines():
        if device in line:
           return line.split()[1]
           break
    mtab.close()


# getting all local partitions plus their uuids
def getpartitions():
    uuids = os.listdir("/dev/disk/by-uuid") #folder contains symlinks to the actual disk devices 
    parts = {} #initializing empty dictionary for partitions and uuids
    for uuid in uuids: #write /dev/names as keys and uuids as values in the dictionary
        parts["/dev/" + os.readlink("/dev/disk/by-uuid/" + uuid)[6:]] = uuid
    return parts #return the dictionary for further useage


test = getpartitions()
print test

print ""

for device in test.keys():
    ismounted = getmountpoint(device)
    if ismounted != None:
        print str(device) + " is mounted at " + str(ismounted)
    else:
        print str(device) + " is not mounted"



# getting usage information and print it to stdout
for mountpoint in mountpoints:
    #check if given path is a mountpoint
    if os.path.ismount(mountpoint):
        #create statvfs object
        fs = os.statvfs(mountpoint)
        #calculate free megabytes
        freembytes = fs.f_bavail * fs.f_bsize / 1024**2.0
        #output
        print "%s\t\t%.1f MB" %(mountpoint, freembytes)
    else:
        print "error: given path (%s) is not a mountpoint" %(mountpoint)



partitions = [["/dev/sda1", "uuid", "/home", "filesystem", "total blocks", "free blocks"], ["/dev/sda2", "uuid", "/", "filesystem", "total blocks", "free blocks"]]