exercise_helper.py

#!/usr/bin/env python

# Crontab setting to bother you during wokring hours on weekdays
# 0	9,10,11,12,13,14,15,16	*	*	1,2,3,4,5	/usr/local/bin/exercise_helper.py

from random import choice, randrange
from datetime import date
from math import ceil
import tkMessageBox

EXERCISES = (
    ("mountain climbers", 10, 20, 1),
    ("burpees", 10, 20, 1),
    ("situps", 15, 30, 1),
    ("pushups", 7, 12, 0.5),
)
START_DATE = date(2015, 5, 29)

def get_increment(x, extra):
    return int(ceil(0.02 * pow(x, 2) * extra))


name, mn, mx, extra_multiplier = choice(EXERCISES)
days_out = max((date.today() - START_DATE).days, 1)
inc = get_increment(days_out, extra_multiplier)
count = randrange(mn + inc, mx + inc)
title = "It's day {}!".format(days_out)
message = "Here's your exercise to do: {}. Do {} of them.".format(name, count)
tkMessageBox.showinfo(title, message)