Python： 遍曆

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======================遍曆列表========================
# 直接遍曆list：

for elem in list:     pass

 

# 通過索引擷取

for i in range(len(list)):     elem = list[i]     pass

 

# 基於enumerate()遍曆

for i, elem in enumerate(list):     pass

 

# 基於iter()遍曆

listIter = iter(list)while True:     try:          elem = listIter.next()          # ....     expect StopIteration, ex:          // NOOP

 

=====================遍曆dict==========================
# 通過key遍曆

for key in dict.keys():     value = dict.get(key)     pass

 

# 直接遍曆，本質是先轉換成 (key,value)的list

for key,value in dict.items():     pass

 

# iteritems() 傳回值是 items的迭代器

for key,value in dict.iteritems():     pass

 

Python： 遍曆