import random
list =[]
for i in range(100):
    list.append(random.randrange(0,101))
print(list)
for i in range(3):
    for element in list:
        if element > 50:
            list.remove(element)
    print(list)
suma = 0
for element in list:
    suma += element
print(suma/ len(list))
-----------------------------

import random
lista = []
for i in range(1000):
    lista.append(random.randrange(0, 10))
print(lista)
suma = 0
for element in lista:
    suma += element
srednia = suma/ len(lista)

dict = {
    "srednia": srednia,
    "suma": suma,
    "lista": lista
}
print(dict)
----------------------------

string = "lubie placki lubie placki lubie placki lubieplacki plack0i python placki"

new = string.replace("placki", "PYTHON")
print(new)
print(string)
print(new.count("PYTHON", 0, len(new)))

------------------------------
def convert(km):
    return  str(1.6 * km)


km = float(input("Podaj długość w kilometrach: "))

mile = convert(km)
print(km, " kilemetrów to: ", mile, " mil.")