make.py

from __future__ import print_function
import csv
import re
from collections import defaultdict

addresses = []
with open('google.csv', 'rb') as csv_file:
  contacts_reader = csv.reader(csv_file)

  for row in contacts_reader:
    addresses.append(row[-1])

addresses = addresses[1:]

groups = {re.compile(r'-14@'): 'Class of 2014',
          re.compile(r'-15@'): 'Class of 2015',
          re.compile(r'-16@'): 'Class of 2016',
          re.compile(r'-17@'): 'Class of 2017'}

addresses_by_group = defaultdict(lambda: [])
faculty_staff_addresses = []

for address in addresses:
  for group_regexp in groups.keys():
    if group_regexp.search(address):
      addresses_by_group[groups[group_regexp]].append(address)
      break
  else:
    faculty_staff_addresses.append(address)

group_tuples = sorted(addresses_by_group.items())
for group_tuple in group_tuples:
  group_name, group_addresses = group_tuple
  print(group_name)
  print('='*len(group_name))

  print(', '.join(group_addresses))
  print()

print("Faculty and staff")
print("=================")
print(', '.join(faculty_staff_addresses))
print()

print("Entire school")
print("=============")
print(', '.join(addresses))