Python的一个很简单的问题 我是新手，求教 从for开始，下面是干嘛的啊，真是没看明白啊

def store(data,full_name):
names = full_name.split()

print full_name
if len(names) == 2:names.insert(1,'')

labels = 'first','middle','last'

for label, name in zip(labels,names):
people = lookup(data,label,name)
if people:
people.append(full_name)
else:
data[label][name] = [full_name]
还有一个函数
def lookup(data,label,name):
return data[label].get(name)

就是不懂for里面是怎么实现的

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