import os
import re

insertions = 0
deletions = 0
r = re.compile('.* \d+ files changed, (\d+) insertions\(\+\), (\d+) deletions\(-\)')

test_match = r.match(' 8 files changed, 220 insertions(+), 1 deletions(-)\n')
assert test_match, test_match
assert 220 == int(test_match.group(1)), test_match.group(1)
assert 1 == int(test_match.group(2)), test_match.group(2)

i = 0

last_commit = None
for line in os.popen('git log'):
    if line.startswith('commit '):
        last_commit = line[7:-1]
    if line.startswith('Author: chad '):
        print last_commit
        shortstat = os.popen('git diff --shortstat %s^ %s' % (last_commit, last_commit)).read()
        print shortstat
        m = r.match(shortstat)
        if m:
            insertions += int(m.group(1))
            deletions += int(m.group(2))

            print 'Total insertions', insertions, 'Total deletions', deletions

        i += 1
        #if i > 20:
        #    break

print 'Total insertions', insertions
print 'Total deletions', deletions