Foro de elhacker.net

n = int(raw_input('Introduce un entero positivo: '))
 
M = []
for i in range(n):
    M.append( [0] * n )
    print M
 
M [0] [0] = 1
print M

while True:
    try:
        n = int(raw_input("[!]Introduce el orden de la matrix: "))
        break;
    except:
        print "[X]Formato incorrecto."
 
M = []
for i in range(n):
    a = [0] * n
    a[i] = 1
    print a         ## Simplemente para mostrarla, en realidad no se ha de mostrar
    M.append(a)

while True:
    try:
        n = input("[!]Introduce el orden de la matrix: ")
        break;
    except:
        print "[X]Formato incorrecto."
 
M = [[int(i==e) for i in range(n)] for e in range(n)]
print M

import timeit
def test():
    n = 10
    M = []
    for i in range(n):
        a = [0] * n
        a[i] = 1
        print a
        M.append(a)
 
if __name__=='__main__':
    from timeit import Timer
    t = Timer("test()", "from __main__ import test")
    print t.timeit(1000)

import timeit
def test1():
    n = 10
    M = [[int(i==e) for i in range(n)] for e in range(n)]
def test2():
    n = 10
    M = []
    for i in range(n):
        a = [0] * n
        a[i] = 1
        M.append(a)
 
if __name__=='__main__':
    from timeit import Timer
    t = Timer("test1()", "from __main__ import test1")
    print t.timeit(10000), "->Novlucker"
    t = Timer("test2()", "from __main__ import test2")
    print t.timeit(10000), "->Karcrack"

1.05840686456 ->Novlucker
0.208165562942 ->Karcrack
1.00837229313 ->Novlucker
0.21114219824 ->Karcrack
0.989414576434 ->Novlucker
0.205958299169 ->Karcrack
0.987928354023 ->Novlucker
0.208567848707 ->Karcrack
0.993568176961 ->Novlucker
0.210146820336 ->Karcrack
0.980355603855 ->Novlucker
0.204104990997 ->Karcrack
0.984192963072 ->Novlucker
0.205497626095 ->Karcrack
0.981901331035 ->Novlucker
0.203624203635 ->Karcrack
0.982219807266 ->Novlucker
0.2067748834 ->Karcrack
0.98221617552 ->Novlucker
0.283576264581 ->Karcrack

    n = 10
    M = [[0]*n for i in range(n)]
    while n:
        n-=1
        M[n][n] = 1