Question

I feel there must be an easier (cleaner) way to use comprehensions to parse the meminfo file on linux. The format of the file is:

MemTotal:        3045588 kB
MemFree:         1167060 kB
Buffers:          336752 kB
Cached:           721980 kB
SwapCached:            0 kB
Active:           843592 kB
Inactive:         752920 kB
Active(anon):     539968 kB
Inactive(anon):   134472 kB

I tried to rewrite the for loop id been using to use a comprehension and found I needed 3 of them…

def parse_mem_file(memfile = '/proc/meminfo'):
    lines = open(memfile, 'r').readlines()
    lines = [line.strip('kB\n') for line in lines if line[-3:] == 'kB\n']
    lines = [line.split(':') for line in lines]
    return dict((key, int(value)) for (key, value) in lines)

print parse_mem_file()

What am I doing wrong? Is there a reasonable way to simplify this?

Answer 1

d = {}
with open(f) as fin:
    for l in fin:
        x = l.split()
        d[x[0][:-1]] = int(x[1])
return d