Histogram for two dice of any size

dice_histogram.py

"""
https://stackoverflow.com/questions/33454739/distribution-of-dice-rolls
&
https://stackoverflow.com/questions/20335617/unlimited-sides-to-dice-in-simulator/
"""
from collections import Counter
import sys
from random import randint

# Python 2/3 compatibility
if sys.hexversion >= 0x3000000:
    inp = input
    rng = range
else:
    inp = raw_input
    rng = xrange


def get_int(prompt, default=6):
    """Convert string to an int."""
    while True:
        try:
            return int(inp(prompt))
        except ValueError:
            return default


def single_bar(val, value, scale):
    """Print a single bar for the histogram."""
    print('{:>2} {} {}'.format(val, '#'*int(value*scale + 0.5), value))


def histogram(results, maxbar=76):
    """Create and then print the histogram."""
    #   find the histogram domain
    values = list(results.keys())
    _lo, _hi = min(values), max(values)
    # find the data range
    scale = maxbar / float(max(results.values()))
    # output the results
    for val in rng(_lo, _hi + 1):
        single_bar(val, results[val], scale)


def main():
    """Main"""
    side1 = get_int("How many sides does your first die have? ")
    side2 = get_int("How many sides does your second die have? ")
    times = get_int("How many times do you want to roll? ", default=100000)
    maxbar = get_int("How long is your max bar? ", default=76)
    results = Counter(
        (randint(1, side1) + randint(1, side2)) for roll in rng(times))
    print("\nProcessed %s rolls for a d%s and a d%s...\n" %
          (times, side1, side2))
    histogram(results, maxbar=maxbar)
    print("\n")

if __name__ == "__main__":
    main()