Functions in Python

x = [[0], [1]]
print((' '.join(list(map(str, x))),))

def foo(i, x=[]):
    x.append(x.append(i))
    return x
for i in range(3):
    y = foo(i)
print(y)

def foo(k):
    k = [1]
q = [0]
foo(q)
print(q)

x = [12, 34]
print(len(''.join(list(map(int, x)))))

def power(x, y=2):
    r = 1
    for i in range(y):
       r = r * x
    return r
print power(3)
print power(3, 3)

l=[-2, 4]
m=map(lambda x:x*2, l)
print(m)