Compare two md5sum files (needs to be same filename format) and prints out which file have been changed/removed/added (example: python3 md5_compare.py oldmd5s.md5 newmd5s.md5))

md5_compare.py

#!/usr/bin/python3
import sys

def prRed(output): print("\033[91m{}\033[00m".format(output)) 

if len(sys.argv) < 3:
    print("Not enough arguments. Need two files to compare (old first, new last).")
    exit(1)
if len(sys.argv) > 3:
    print("Too many arguments. Need two files to compare only (old first, new last).")
    exit(1)

oldfilename = sys.argv[1]
newfilename = sys.argv[2]

oldmd5file = open(oldfilename)
oldmd5lines = oldmd5file.readlines()
oldmd5 = {}
for line in oldmd5lines:
    line = line.strip('\n').strip()
    if line.startswith("#"):
        print("is#")
        continue
    if line=="":
        print("empty")
        continue
    splitline = line.split("  ")
    oldmd5[splitline[1]]=splitline[0]

newmd5file = open(newfilename)
newmd5lines = newmd5file.readlines()
newmd5 = {}
for line in newmd5lines:
    line = line.strip('\n').strip()
    if line.startswith("#"):
        print("is#")
        continue
    if line=="":
        print("empty")
        continue
    splitline = line.split("  ")
    newmd5[splitline[1]]=splitline[0]

statValid = 0
statNew = 0
statChanged = 0
statRemoved = 0
for fn in newmd5:
    if not oldmd5.get(fn):
        print(fn+": new")
        statNew += 1
        continue
    if oldmd5[fn] == newmd5[fn]:
        #print(fn+": valid")
        statValid += 1
        oldmd5.pop(fn)
        continue
    if oldmd5[fn] != newmd5[fn]:
        if sys.stdout.isatty():
            prRed(fn+": changed")
        else:
            print(fn+": changed")
        statChanged += 1
        oldmd5.pop(fn)
        continue
    print(fn+": unhandled")

for fn in oldmd5:
    print(fn+": removed")
    statRemoved += 1
    
print("\nStatistics:\n- Valid: "+str(statValid)+"\n- New: "+str(statNew)+"\n- Removed: "+str(statRemoved)+"\n- Changed: "+str(statChanged))