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将python for循环转换为while循环_Python_Loops_For Loop_While Loop - Fatal编程技术网

将python for循环转换为while循环

将python for循环转换为while循环,python,loops,for-loop,while-loop,Python,Loops,For Loop,While Loop,我正在尝试在python中将for循环转换为while循环,但我不太确定如何实现。这里需要帮助,谢谢!这就是我正在处理的问题: with open('name.csv') as labelcsv: reader = csv.reader(labelcsv) name = [] namenumber = [] for row in reader: tags.append(row[0]) namenumber.append(row[1]

我正在尝试在python中将for循环转换为while循环,但我不太确定如何实现。这里需要帮助,谢谢!这就是我正在处理的问题:

with open('name.csv') as labelcsv:
    reader = csv.reader(labelcsv)
    name = []
    namenumber = []
    for row in reader:
        tags.append(row[0])
        namenumber.append(row[1])

我不知道改变它有什么好处

with open('name.csv') as labelcsv:
    reader = csv.reader(labelcsv)
    name = []
    namenumber = []
    row = next(reader, None)
    while row:
        tags.append(row[0])
        namenumber.append(row[1])
        row = next(reader, None)

阅读更多信息:

我不知道改变它有什么好处

with open('name.csv') as labelcsv:
    reader = csv.reader(labelcsv)
    name = []
    namenumber = []
    row = next(reader, None)
    while row:
        tags.append(row[0])
        namenumber.append(row[1])
        row = next(reader, None)

阅读更多信息:

为什么要这样做?
reader
具有专门用于
for loop
的内置函数,因此在loop时创建
可能不容易。是否可以解释此代码对reader中的行的作用:tags.append(行[0])namenumber.append(行[1])为什么要这样做?
读卡器
具有专门用于循环
的内置函数,因此在循环时创建
可能不容易。重复的。您是否可以解释此代码对读卡器中的行所做的操作:tags.append(行[0])namenumber.append(行[1])