python字符串放入列表,Python：字符串到列表列表

秒速五厘米 2023-01-24 02:26 132阅读 0赞

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I’m new to python and confused about converting a string to a list. I’m unsure how to create a list within a list to accomplish the following:

Ex.

string = ‘2,4,6,8|10,12,14,16|18,20,22,24’

I’m trying to use split() to create a data structure, my_data, so that when I input

print my_data[1][2] #it should return 14

Stuck:

This is what I did at first:

new_list = string.split(‘|’) #[‘2,4,6,8’, ‘10,12,14,16,’, ‘18,20,22,24’]

And I know that you can’t split a list so I split() the string first but I don’t know how to convert the strings within the new list into a list in order to me to get the right output.

解决方案>>> text = ‘2,4,6,8|10,12,14,16|18,20,22,24’

my_data = [x.split(‘,’) for x in text.split(‘|’)]

my_data

[[‘2’, ‘4’, ‘6’, ‘8’], [‘10’, ‘12’, ‘14’, ‘16’], [‘18’, ‘20’, ‘22’, ‘24’]]

print my_data[1][2]

14

Maybe you also want to convert each digit (still strings) to int, in which case I would do this:

[[int(y) for y in x.split(‘,’)] for x in text.split(‘|’)]

[[2, 4, 6, 8], [10, 12, 14, 16], [18, 20, 22, 24]]

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