[Python] Dvojrozmerne pole/zoznam

def Nacitaj_subor(meno):
    subor = open(meno,'r');
    pole = [];
    riadky = [];
    riadky = subor.readlines();
    for i in range(len(riadky)):
        pole[i] = [];
        for j in range(len(riadky[i])-1):
            pole[i][j] = riadky[i][j];

Nacitaj_subor('plocha.txt');

def Nacitaj_subor(meno):
    subor = open(meno,'r')
    pole = []
    for riadok in subor.readlines():
        pole.append(list(riadok[:-1]))
    subor.close()

def Nacitaj_subor(meno):
    subor = open(meno,'r')
    pole = [list(riadok[:-1]) for riadok in subor.readlines()]
    subor.close()