Import random def copy_1d(lst):
b = []
for item in lst:
b. append(item)
return b
def copy_two_d(a):
b = []
for sublist in a:
b. append(copy_1d(sublist))
return b
def three_d_false(n):
pre_1 = [False]
pre_1 *= n
pre_2 = []
for i in range(n):
pre_2.append(copy_1d(pre_1))
final = []
for i in range(n):
final. append(copy_two_d(pre_2))
return final
def three_d_selfavoid(n, trials):
deadEnds = 0
length = 0
for i in range(trials):
been_there = three_d_false(n)
x = n // 2
y = n // 2
z = n // 2
while x > 0 and x < n - 1 and y > 0 and y < n - 1 and z > 0 and z < n - 1:
been_there[x][y][z] = True
print(x, y, z)
if been_there[x + 1][y][z] and been_there[x - 1][y][z] and been_there[x][y - 1][z] and been_there[x][y + 1][z] and been_there[x][y][z + 1] and been_there[x][y][z - 1]:
deadEnds += 1
break
r = random. randrange(1, 7)
if r == 1 and not been_there[x + 1][y][z]:
x = x + 1
length += 1
print(1)
elif r == 2 and not been_there[x - 1][y][z]:
x = x - 1
length += 1
print(2)
elif r == 3 and not been_there[x][y + 1][z]:
y = y + 1
length += 1
print(3)
elif r == 4 and not been_there[x][y - 1][z]:
y = y - 1
length += 1
print(4)
elif r == 5 and not been_there[x][y][z + 1]:
z = z + 1
length += 1
print(5)
elif r == 6 and not been_there[x][y][z - 1]:
z = z - 1
length += 1
print(6)
print(length / trials, deadEnds / trials * 100)
three_d_selfavoid(3, 100)

However, when I run this, it just keeps x, y, and z at 1, 1, and 1. What's wrong...