Increment :emphasize-lines: numbers

emphasize_lines_increment

import os
import re

# read a file or define a variable that is a string here...

# this defines how much you would like to add to the values (can be a negative number)
delta = 2

matches = re.findall(':emphasize-lines: (.*)', file_text)

# increment intervals appropriately
for match in matches:
    emphasis_intervals = list()

    for range_ in match.split(","):
        new_nums = list()

        for num in range_.split("-"):
            new_nums.append(str(int(num) + delta))

        emphasis_intervals.append("-".join(new_nums))

    print("New intervals: {}".format(,".join(emphasis_intervals)))