Contractual record

A self respecting geek father wouldn't be a complete person unless he scrambled to write some Python to help him keep track of the duration and time between contractions. I just worked this manually from the command-line but you could totally turn this into an application with graphs and charts and people would buy it.

import time
timings = []

def start():
    timings.append([time.time()])
    if len(timings) > 1:
        diff = timings[-1][0] - timings[-2][0]
        print "Since last: %s (%.2f seconds)" % (howlong(diff), diff)

def stop():
    s = timings[-1]
    s.append(time.time())
    print "Duration: %.2f seconds" % (s[1] - s[0],)

def howlong(t):
    v = (t // 60), t - ((t // 60) * 60)
    return '%d minutes %.2f seconds' % v