Find other items with related dependencies, see http://codereview.stackexchange.com/questions/98640/finding-items-of-related-dependencies-in-factorio

get_dependents.py

import collections, csv, itertools

recipes = collections.defaultdict(set)
tolerance = 0

with open('rec.csv') as csvfile:
	reader = csv.reader(csvfile)
	for row in reader:
		recipes[row[0]].add(row[1])

def get_text(base_factory_item_name, related_factory_item_name, needed_items_list):
	default_text = "Factory of {} can also produce {}, just add {}"
	noadd_text = "Factory of {} can also produce {}"
	if needed_items_list:
		return default_text.format(base_factory_item_name,
		                           related_factory_item_name,
		                           ",".join(needed_items_list))
	else:
		return noadd_text.format(base_factory_item_name, related_factory_item_name)

for left, right in itertools.product(recipes, repeat=2):
	if left != right and recipes[right].issuperset(recipes[left]):
		needed_items_list = recipes[right] - recipes[left]
		if len(needed_items_list) <= tolerance:
			print(get_text(left, right, needed_items_list))