Hacked up script for matplotting change in TF compiler dir.

changeplot.py

# git log --format='%ad %H %s' --no-merges --date=short tensorflow/compiler/ | python2.7 ~/changeplot.py

import fileinput

import matplotlib.pyplot as plt
from datetime import date, timedelta

START_DATE = date(2017, 1, 1)

dates = [(START_DATE, START_DATE + timedelta(days=7))]
while True:
    dates.append((dates[-1][1], dates[-1][1] + timedelta(days=7)))
    if dates[-1][1] > date.today():
        break
counts = [0 for m in xrange(len(dates))]

for line in fileinput.input():
    date_str, text = line.split(' ', 1)
    y, m, d = [int(p) for p in date_str.split('-')]
    change_date = date(y, m, d)
    for i, (lo, hi) in enumerate(dates):
        if lo <= change_date < hi:
            counts[i] += 1
            break

plt.style.use('ggplot')
plt.stem([d[0] for d in dates], counts)
plt.xticks(rotation = 90)
plt.title('TF/compiler Commit Activity vs Time')
plt.ylabel('Commit Count')
plt.xlabel('Week')
plt.show()