[Python] I can't understand differences between codes :( [closed]

I have an exam and it includes a task, that requires writing an algorithm DBscan for finding clusters and their centroids by data in file (file with two columns X and Y). I cant understand why this two codes working different. The first code

s = open('name_of_file.txt')
s.readline()
data = []
for p in s:
p = p.replace(',', '.')
r = [float(i) for i in p.split()]
data.append(r)

print(len(data))
def dist(p1, p2):
x1, y1, x2, y2 = *p1, *p2
return ((x2 - x1)**2 + (y2 - y1)**2)**0.5

def getCluster(p0):
cluster = [p for p in data if dist(p0, p) < 1]
if len(cluster) > 0:
for p in cluster: data.remove(p)
next_cluster = [getCluster(p) for p in cluster]
for c in next_cluster: cluster.extend(c)
return cluster

clusters = []
while len(data) > 0:
p0 = data.pop()
cluster = [p0] + getCluster(p0)
print(len(cluster), print(cluster[:15]))
clusters.append(cluster)

def center(kl):
m = []
for p in kl:
s = sum(dist(p, p0) for p0 in kl)
m.append([s, p])
return min(m)[1]

centers = [center(c) for c in clusters]


The second code is almost the same, only part of the "getCluster" function is different

def getCluster(p0):
cluster = [p for p in data if dist(p0, p) < 1]
if len(cluster) > 0:
for p in cluster: data.remove(p)
next_cluster = [getCluster(p) for p in cluster]
cluster.extend(next_cluster) #this is it
return cluster


I try to google this problem, but i dont find smth for me.

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