Network Download Upload datasize

Example:1
#!/usr/bin/python3

f = open('/proc/net/dev')
r = f.read().splitlines()
net_data = {}
for data in r[2:]:
    data = data.split(':')
    if data[0].strip() != 'lo':
        net_data[data[0]] = [float(data[1].split()[0])/(1024*1024), 
                            float(data[1].split()[8])/(1024*1024)]

for i in net_data.items():
    print('{}: Downloaded {:1.2f} MiB,  Uploaded:{:1.2f} MiB'.format(i[0],i[1][0],i[1][1]))
    
Example:2
#!/usr/bin/python3
from collections import namedtuple

f = open('/proc/net/dev')
r = f.read().splitlines()
device_data = {}
data = namedtuple('data', 'rx tx')
for line in r[2:]:
    if line.split(':')[0].strip() != 'lo':
        device_data[line.split(':')[0]] = data(float(line.split()[1])/(1024*1024), 
                                               float(line.split()[9])/(1024*1024))
for keys in device_data.keys():
    print('{}: Down{:10.2f}MiB | Up {:5.2f}MiB'.format(keys,device_data[keys].rx, device_data[keys].tx))