toccy.py

import sys, re

from os import walk, path

dir = sys.argv[1]

threshold = 20

for (dirpath, dirnames, filenames) in walk(dir):
    for filename in filenames:
        if filename.endswith("index.md"):
            in_file = open(path.join(dirpath, filename), "r")
            lines = in_file.readlines()
            h3s = 0
            for line in lines:
                if line.startswith("### "):
                    h3s = h3s+1
            if h3s > threshold:
                print("{} : {}".format(dirpath, h3s))