copy_diff - Compare two sections of the same file See http://robjwells.com/post/61132555301/solo-diff

copy_diff.py

#!/usr/bin/env python3

import os
import re
import subprocess

os.chdir('/tmp')
with open(os.environ['BB_DOC_PATH']) as full_file:
    sub_copy, orig_copy = re.split(r'#{2,} original copy #{2,}',
                                   full_file.read(), flags=re.I)

with open('bb_orig_copy', 'w') as orig_file:
    orig_copy = orig_copy.strip() + '\n'
    orig_file.write(orig_copy)

with open('bb_subbed_copy', 'w') as sub_file:
    sub_copy = sub_copy.strip() + '\n'
    sub_file.write(sub_copy)

subprocess.call(['bbdiff', 'bb_orig_copy', 'bb_subbed_copy'])

dupe_copy.py

#!/usr/bin/env python3
from sys import stdin
orig = stdin.read()
dupe = "{0}\n\n\n\n#### Original Copy ####\n\n\n\n{0}".format(orig)
print(dupe)