SystemReport.py

#!/bin/python
"""
python report.py | sendmail user@domain.com

"""
import yum, platform
import os
from collections import namedtuple
DiskUsage = namedtuple('DiskUsage', 'total used free')

def disk_usage(path):
    """
    https://stackoverflow.com/a/31856769
    Return disk usage statistics about the given path.

    Will return the namedtuple with attributes: 'total', 'used' and 'free',
    which are the amount of total, used and free space, in bytes.
    """
    st = os.statvfs(path)
    free = st.f_bavail * st.f_frsize
    total = st.f_blocks * st.f_frsize
    used = (st.f_blocks - st.f_bfree) * st.f_frsize
    return DiskUsage(total, used, free)

def GetHumanReadable(size,precision=2):
    """
    https://stackoverflow.com/a/32009595
    """
    suffixes=['B','KB','MB','GB','TB']
    suffixIndex = 0
    while size > 1024 and suffixIndex < 4:
        suffixIndex += 1 #increment the index of the suffix
        size = size/1024.0 #apply the division
    return "%.*f%s"%(precision,size,suffixes[suffixIndex])


base = yum.YumBase()
base.setCacheDir()
package_list = base.doPackageLists(pkgnarrow='updates', patterns='', ignore_case=True)
hostname = platform.uname()[1]
du = disk_usage('/')
duh = DiskUsage(GetHumanReadable(du.total), GetHumanReadable(du.used), GetHumanReadable(du.free))

output = '''
---- Host : %s -----

     Needs Updates To
     -----------------------  
     %s
    
    
     Disk Space
     -----------------------
     Free  : %s
     Used  : %s
     Total : %s
'''

pkgs = [x.name for x in package_list.updates]
st = '\n     '.join(pkgs)
print(output % (hostname, st, duh.free, duh.used, duh.total))