在Python中使用两个定界符从字符串数据创建嵌套列表 [英] Creating nested list from string data with two delimiters in Python

问题描述

我正在尝试获取一个如下所示的文本文件:

I am trying to take a text file that looks like this:

1〜氢〜H〜1.008〜1〜1 | 2〜氦〜氦〜4.002〜18〜1 | 3〜锂〜锂〜6.94〜1〜2 | 4〜铍 是〜9.0122〜2〜2 |

1~Hydrogen~H~1.008~1~1|2~Helium~He~4.002~18~1|3~Lithium~Li~6.94~1~2|4~Beryllium~ Be~9.0122~2~2|

并将其转换为如下所示的嵌套列表:

and turn it into a nested list that looks like this:

[[1，氢，H，1.008，1，1]，[2，氦，He，4.002，18，1]，[3，锂，Li，6.94，1，2]，[4，铍，Be，9.0122，2，2]]

[[1, Hydrogen, H, 1.008, 1, 1], [2, Helium, He, 4.002, 18, 1], [3, Lithium, Li, 6.94, 1, 2], [4, Beryllium, Be, 9.0122, 2, 2]]

我的代码如下:

class Parser:
    def __init__(self, path):
        self.file = open(path, "r")
        self.unparsed_info = self.file.read()
        self.parsed_by_element = []
        self.parsed_info = []
        self.parse_list('|', '~')

    def parse_list(self, delimiter1, delimiter2):
        for elements in self.unparsed_info.split(delimiter1):
            e = elements.strip(delimiter1)
            if e != '':
                self.parsed_by_element.append(e)
            for properties in e.split(delimiter2):
                p = properties.strip(delimiter2)
                if p != '':
                    self.parsed_by_element.insert("something that represents location of current element being manipulated", p)

但是我不知道如何在最后一行插入空白.有人有什么建议吗?还是更好的方法呢?

but I can't figure out how to fill in the blank for the insertion on the last line. Does anybody have any suggestions? Or a better way to do this?

推荐答案

您可以用一种更简单的方法来完成此操作，同时我假设您需要进行int和float转换吗?因为您想要的输出看起来就是这样.

You can do this in a much simpler way, also I'm assuming you need int and float conversions? because your desired output looks that way.

def parse(path):
    list_of_lists = []
    with open(path) as file_handle:
        for line in file_handle:
            for string in line.split("|"):
                if string:
                    list_of_lists.append([int(e) if e.isdigit() else float(e) if "." in e else str(e) for e in string.rstrip().split("~") if e != " "])
    return list_of_lists

my_filepath = "mytxt.txt"
my_list_of_lists = parse(my_filepath)

结果:

for sublist in my_list_of_lists:
    print (sublist)

[1, 'Hydrogen', 'H', 1.008, 1, 1]
[2, 'Helium', 'He', 4.002, 18, 1]
[3, 'Lithium', 'Li', 6.94, 1, 2]
[4, 'Beryllium', ' Be', 9.0122, 2, 2]

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