Calculator for the "GZCL method for powerlifting"

gzcl2csv.py

# -*- encoding: utf-8 -*-

import math
import csv

plate = 2.5
days = ['Mon', 'Tue', 'Wed', 'Thu', 'Fri']
exercises = ['Squat', 'Bench', 'Deadlift', 'Bench', 'Squat']
tier1 = [[85, 1, 3], [87.5, 2, 2], [90, 3, 1]]
tier2 = [[70, 7, 5], [75, 6, 4], [80, 10, 3], [60, 3, 10]]


# This function rounds the weight to the smallest plate
def round_weight(weight):
    f = math.floor(weight/plate) * plate
    c = math.floor(weight/plate) * plate

    if weight - f > c - weight:
        rounded_weight = c
    else:
        rounded_weight = f
    return rounded_weight


# Calc Tier1 weights for 1 week
def calc_tier1(increment):
    t = []
    for i, s in enumerate(tier1):
        tt = []
        for weight in weights:
            w = round_weight(s[0]*(weight+increment)/100)
            tt.append("%.1f %d x %d" % (w, s[1], s[2]))
        t.append(tt)
    return t


# Calc Tier 2 weights for 1 week
def calc_tier2(week):
    t = []
    s = tier2[week-1]
    for weight in weights:
        w = round_weight(s[0]*weight/100)
        t.append("%.1f %d x %d" % (w, s[1], s[2]))
    return t


def write_csv(filename):
    try:
        f = open(filename, 'wt')
        writer = csv.writer(f, delimiter=';', quoting=csv.QUOTE_ALL)

        percentage_increment = 0
        for week in range(1, 5):
            # Headers
            writer.writerow(["Week %d" % week])
            writer.writerow(days)
            writer.writerow(exercises)

            # Data
            t1 = calc_tier1(percentage_increment)
            t2 = calc_tier2(week)
            writer.writerows(t1)
            writer.writerow(t2)

            # Empty line as separator
            writer.writerow([])

            percentage_increment += 2.5

        # Close the file
        f.close()

        #print open(filename, 'rt').read()
    except Exception:
        pass


def print_intro():
    text = """
    The GZCL for powerlifting
        http://www.reddit.com/r/weightroom/comments/13n0j5/the_gzcl_method_for_powerlifting/
        http://swoleateveryheight.blogspot.com.es/2012/11/the-gzcl-method-for-powerlifting.html

    Enter a weight that you can 3RM on a good day or 1RM on a bad/sick day
    """
    print text

if __name__ == '__main__':
    print_intro()
    squat = float(raw_input("\tSquat? > "))
    bench = float(raw_input("\tBench? > "))
    deadlift = float(raw_input("\tDeadlift? > "))
    weights = [squat, bench, deadlift, bench, squat]

    filename = raw_input("\n\tFilename? > ")
    if not filename:
        filename = 'gzcl_template'
    filename += '.csv'
    write_csv(filename)
    print "Now you have your monthly progression saved in a csv file: %s" % filename

Do I just drop it into excel, or....?