[Python] avoiding loops in python

I understand that loops are a bad idea in python and I should avoid them.

Well, I have several of those I want to avoid.

I have a list of stuff named lipid:

class bead:
x = 0
y = 0
z = 0
LID = 0
t = 0

class lipid:
h = bead()
b = bead()
t = bead()
LID = 0


and I am doing the following (code below):

1. initializing a 2d array of hs going over all the lipids and
2. determine if they are counted as U or down
3. adding value to the appropriate h

How can I avoid, at least, the first loop?

1:

class h:
cU = 0
cD = 0
hU = 0
hD = 0
h = 0

for i in range(0,8):
hs.append([])
for j in range(0,8):
index = (i,j)
hn = h()
hs.append(hn)


2 and 3:

for LID in lipids:
l = lipids[LID]
up = l.h.z > l.t.z
X = (int)(l.b.x*8/L)
Y = (int)(l.b.y*8/L)
Z = (l.b.z)*0.5
if up:
hs[X][Y].hU += Z
hs[X][Y].cU += 1
else:
hs[X][Y].hD += Z
hs[X][Y].cD += 1

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