Jezyki interpret/skryptowe

"""def poleProstokata(a,b):
    return a * b

if __name__ == "__main__":
    print ("Hello world")
    a = float (input("a="))
    b = float (input("b="))
    print("Pole={0}".format(poleProstokata(a,b)))"""

import math


def literaGwiazdki():
    a = int (input("Wysokosc litery="))
    b = a//2
    c=b
    d=b
    e=  0
    while a > 0:
        if a > b+1:
            print (((' ')*e)+("*") + (' '*(c*2-1)) + ("*"))
            c -=1
            e+=1
        else:
            print (((' ')*(d)) +("*"))
        a -= 1


def zad2():
    a= []
    b =[]
    c = int (input("Rozmiar listy="))
    d = 1
    x=0
    while d <= c:
        while x < d:
            a.append(d)
            x +=1
        b.append(a)
        a = []
        d +=1
        x=0
    print (b)

def zad3a():
    a = []
    x = 1
    while x <= 10:
        b = x, pow(x,2)
        a.append(b)
        x+=1
    print (a)

def zad3b():
    a = [2000, 1990, 1980, 1960, 1940, 1900]
    b = []
    for x in a:
        b.append(2017 - x)
    print(b)

def zad3c():
    b = []
    for x in range(1,1000):
        if x % 7 == 0:
            if x % 5 != 0:
                b.append(x)
    print (b)

def zad4a():
    a = [(x, x**2) for x in range(1,10)]
    print(a)

def zad4b():
    a = [2000, 1990, 1980, 1960, 1940, 1900]
    b = [(2017 - x) for x in a]
    print(b)

def zad4c():
    a = [x for x in range(1,1000) if x%7 ==0 and x%5!=0]
    print(a)

def zad5():
    dic = {1:2,3:4}
    dic2 = {}
    dic3 = {}
    for key, value in dic.items():
        dic2.setdefault(value,[]).append(key)
    for key, value in dic2.items():
        if len(value) > 1:
            dic3.setdefault(key, value)
        else:
            dic3.setdefault(key, value [0])
    print(dic3)

def zad6():
    text = "Ala ma kota"
    kod = [1,2,3]
    szyfr = []
    litera = ""

    for i in range(0,len(text)):
        if (text[i].islower()):
            if (ord(text[i])+kod[i%3] > 122):
                litera = chr(ord(text[i])+kod[i%3]-26)
                szyfr.append(litera)
            else:
                litera = chr(ord(text[i])+kod[i%3])
                #print(ord(text[i]))
                szyfr.append(litera)
        elif (text[i] == ""):
            szyfr.append(litera)
        else:
            szyfr.append(text[i])
    print("".join(szyfr))



if __name__ == "__main__":
    print("literaGwiazdki()")
    literaGwiazdki()
    print("zad2()")
    zad2()
    print("zad3a()")
    zad3a()
    print("zad3b()")
    zad3b()
    print("zad3c()")
    zad3c()
    print("zad4a()")
    zad4a()
    print("zad4b()")
    zad4b()
    print("zad4c()")
    zad4c()
    print("zad5()")
    zad5()
    print("zad6()")
    zad6()