distributions.py

#!/usr/bin/env python3

from random import randint
from collections import Counter


COIN = {
    1: "Kopf",
    2: "Zahl"
}

DICE6 = {key: str(key) for key in range(1, 7)}

EXPERIMENTS = {
    1: {
        "item": COIN,
        "templates": [
            "Die Münze wird {} mal geworfen",
            "Anzahl {}: {}    relative Häufigkeit: {}"
        ]
    },
    2: {
        "item": DICE6,
        "templates": [
            "Der Würfel wird {} mal geworfen",
            "{} gewürfelt: {}    relative Häufigkeit: {}"
            ]
    }
}


def generate_distribution(item, count):
    return Counter(
        randint(min(item.keys()), max(item.keys())) for _ in range(count)
    )
    
    
def calculate_rates(item, distribution, count):
    return {item[key]: (value, value / count * 100) for (key, value) in 
            distribution.items()}
    
    
def print_rates(rates, template):
    for key in sorted(rates.keys()):
        value, rate = rates[key]
        print(template.format(key, value, round(rate, 2)))
        
        
def print_overview(count, template):
    print(template.format(count))
    
    
def run_experiment(item, templates, count):
    rates = calculate_rates(item, generate_distribution(item, count), count)
    print_overview(count, templates[0])
    print_rates(rates, templates[1]) 
    
    
def ask_for_count():
    while True:
        try:
            return abs(int(input("Wie oft möchtest Du werfen? ")))
        except ValueError:
            print("Bitte nur ganze Zahlen eingeben!")
    

def ask_for_experiment():
    while True:
        try:
            return int(input("""
Bitte wählen Sie
    [1] für Münze werfen oder 
    [2] für würfeln:
"""
            ))
        except ValueError:
            print("Bitte nur [1] oder [2] wählen!")
    

def main():
    choice = ask_for_experiment()
    experiment = EXPERIMENTS[choice]
    count = ask_for_count()
    print()
    run_experiment(experiment["item"], experiment["templates"], count)


if __name__ == "__main__":
    main()

A solution for the problem in: http://www.python-forum.de/viewtopic.php?f=1&t=32298