Find and add lesson times mentioned in a Markdown document

times.py

from pathlib import Path
import re

with open('outline.md', 'r') as f_in:
    content = f_in.read()

# Finds all time mentions in the format shown below
pattern = r'\((\d+)\smin\)'  # (3 min)
minutes = re.findall(pattern, content)

# print([int(m) for m in minutes])

total_time = sum([int(m) for m in minutes])
print(total_time)