u1.py

#!/usr/bin/env python

import sys
from math import sqrt

from collections import namedtuple

Input = namedtuple('Input', ['x', 'k', 'n'])

def logseq(x, k, n):
    if n == 0:
        return [float(x)]
    else:
        accum = logseq(x, k, n-1)
        a = accum[-1]
        accum.append(k * a * (1 - a))
        return accum

def _read_input():
    if len(sys.argv) == 1:
        x = input("Dej mi x:")
        k = input("Dej mi k:")
        n = input("Dej mi n:")
        i = Input(x, k, n)
    else:
        x = sys.argv[1]
        k = sys.argv[2]
        n = sys.argv[3]
        i = Input(x, k, n)

    i = Input(float(i.x), float(i.k), int(i.n))
    assert i.x >= 0
    assert i.k >= 0
    assert i.n >= 0
    return i

def main():
    i = _read_input()

    xs = logseq(i.x, i.k, i.n)
    avg = sum(xs) / float(len(xs))
    devs = [x - avg for x in xs]

    for x in xs:
        print(x)

    print("\nPrumer: ", avg)
    print("Prumerna absolutni odchylka: ", sum(devs)/float(len(devs)))
    print("Smerodatna odchylka: ", (sqrt((sum(devs)**2) / float(len(devs)))))

main()