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@splorp / forked from kylefox/
Last active Dec 26, 2015

What would you like to do?
A script by Kyle Fox that calculates basic statistics from my haircut page.
# coding=utf-8
# A script to calculate some basic stats on Grant Hutchinson’s haircuts.
# See:
# Sample output:
# Number of haircuts since December 22, 1998: 53
# Average days between haircuts: 77
# Shortest time between haircuts: April 10, 1999 to May 25, 1999 (45 days)
# Longest time between haircuts: August 11, 2007 to December 09, 2007 (120 days)
# You’ll probably want a haircut in about 63 days (March 08, 2010)
import datetime
import urllib2
from BeautifulSoup import BeautifulSoup
MONTHS = 'january february march april may june july august september october november december'.split()
def fetch_dates():
soup = BeautifulSoup(urllib2.urlopen(HAIRCUTS).read())
return [span.string for span in soup.findAll('span', {"class": "dtstart"})]
def get_dates():
dates = []
for d in fetch_dates():
day, month, year = d.lower().split()
date =, int(MONTHS.index(month))+1, int(day))
except ValueError, e:
print '*** uh oh: %s' % e
return dates
def get_deltas(dates):
deltas = []
mx = None
mx_delta = None
mn = None
mn_delta = None
for idx in range(0, len(dates)):
if idx > 0:
days = (dates[idx] - dates[idx-1]).days
if mx_delta is None or mx_delta < days:
mx_delta = days
mx = (dates[idx-1], dates[idx])
if mn_delta is None or mn_delta > days:
mn_delta = days
mn = (dates[idx-1], dates[idx])
return mn, mx, deltas
if __name__ == '__main__':
STR = "%B %d, %Y"
dates = get_dates()
mn, mx, deltas = get_deltas(dates)
avg = (sum(deltas) / len(deltas))
today =
last = dates[-1]
next = (last + datetime.timedelta(days=avg))
print "Number of haircuts since %s: %d" % (dates[0].strftime("%B %d, %Y"), len(dates))
print "Average days between haircuts: %d" % avg
print "Shortest time between haircuts: %s to %s (%d days)" % (mn[0].strftime(STR), mn[1].strftime(STR), (mn[1]-mn[0]).days)
print "Longest time between haircuts: %s to %s (%d days)" % (mx[0].strftime(STR), mx[1].strftime(STR), (mx[1]-mx[0]).days)
print "You’ll probably want a haircut in about %s days (%s)" % ((, next.strftime(STR))
print "Last haircut (%s) was %s days ago." % (last.strftime(STR), (today-last).days)
splorp commented Nov 9, 2013

I’ve recently made a few changes to Kyle’s original script, including educating the apostrophes and defining the encoding.

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