# pimp_flatten2.py

# pimp_flatten2.py

test = [1, (2, [3, [(4, 5), ['[abc]', ([6], [7, 8]), 9]]]), 0]
print(test)

def f(z,r=[]):
    if len(z):
        if z[0]*0 in [(),[]]:
            f(z[0])
        else:
            r.append(z[0])
        f(z[1:],r)
    return r
0

print f(test)