Instsize - which packages are taking up the most space?

Question

#!/usr/bin/env python
# Prints out packages installed on system
# ordered in descending order on size.
# Abhishek Dasgupta
import subprocess as S
import pickle, os
storage = '/home/username/.config/instsize'
def appendpkg(s): pkgsizes[s] = size(s)
def sgn(x):
if x == 0:
return 0
else:
return int(x/abs(x))
execo = lambda s: S.Popen(s.split(' '), stdout=S.PIPE).communicate()[0]
size = lambda s: float(filter(lambda s: s[:9] == 'Installed', execo('pacman -Qi '+s).split("\n"))\
[0][17:-2])
packages = execo('pacman -Qq').split("\n")[:-1]
def printpkg(p):
print "%-30s %.2f" % (p, pkgsizes[p])
if os.path.exists(storage):
p1 = open(storage, 'rb')
pkgsizes = pickle.load(p1)
p1.close()
else:
pkgsizes = {}
map(appendpkg, packages)
p1 = open(storage, 'wb')
pickle.dump(pkgsizes, p1)
packages.sort(cmp=lambda x,y: sgn(pkgsizes[x] - pkgsizes[y]), reverse=True)
map(printpkg, packages)
The script saves the installsizes to $HOME/.config/instsize so that later access is faster.
To force regeneration of the cache, just remove the $HOME/.config/instsize file.

Answer 1

nice little script
suggestion
you could determine username automatically:
username = os.getenv('USER')
storage = '/home/' + username + '/.config/instsize'