使用Python提取文件中两个大括号之间的信息

发布于 2025-01-12 13:58:49 字数 479 浏览 0 评论 0原文

我有一个以 JSON 结构编写的文件，但格式不正确。内容看起来与此类似：

[{"key0":"value0" , "key1":"value1", "key2":"value2"}, {"key0":"value3", "key1":"value4", "key2:"value5"}, {"key0":"value6", "key1":"value7", "key2:"value8"}]

与之前提出的许多问题不同，内容都在同一行，所以我试图逐行读取代码，但如果我使用 readline()，我会选择整个内容。

我试图仅提取大括号 { } 和方括号之间的信息，然后打印它们。我能够打开该文件，但我发现很难找到一种方法从 { 开始读取并以 } 结束，然后继续查找下一个 { 和 } 等等。我并不关心方括号，只关心大括号。此外，这些值的长度可以不同，因此我可以设置要在括号后读取的字符数，因为大多数时候每组括号的字符数都是不同的。

任何指导将不胜感激。

原文

I have a file that was written in a JSON structure but is not correctly formatted. The content looks similar to this:

[{"key0":"value0" , "key1":"value1", "key2":"value2"}, {"key0":"value3", "key1":"value4", "key2:"value5"}, {"key0":"value6", "key1":"value7", "key2:"value8"}]

Unlike many questioned asked here before, the contents are all on the same line, so I was trying to read the code line by line but I select the whole thing if I use readline().

I am trying to extract only the information between the curly brackets { } with the brackets, and print them. I am able to open the file, but I am finding it difficult to find a way to read starting from the { and ending at } then continue to look for the next { and } and so on. I don't really care about the square brackets, just the curly brackets.
Also, the values can differ in length so I can set a number of characters to be read after the bracket, as it is different for each set of brackets most of the time.

Any guidance would be greatly appreciated.

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燃情 2025-01-19 13:58:49

import re

fileContent = "[{'key0':'value0' , 'key1':'value1', 'key2':'value2'}, {'key0':'value3', 'key1':'value4', 'key2':'value5'}, {'key0':'value6', 'key1':'value7', 'key2':'value8'}]"

pattern_with_braces = r'\{.*?\}'
pattern_without_braces = r'(?<=\{).*?(?=\})'
parts = re.findall(pattern_without_braces, fileContent)

import re

fileContent = "[{'key0':'value0' , 'key1':'value1', 'key2':'value2'}, {'key0':'value3', 'key1':'value4', 'key2':'value5'}, {'key0':'value6', 'key1':'value7', 'key2':'value8'}]"

pattern_with_braces = r'\{.*?\}'
pattern_without_braces = r'(?<=\{).*?(?=\})'
parts = re.findall(pattern_without_braces, fileContent)

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往昔成烟 2025-01-19 13:58:49

我建议您使用 regex 模块来修改这些行，然后将它们转换为字典：

import re
import json
with open("data.txt") as f:
  lines = f.readlines()
  for line in lines:
    modified = re.sub(r"({|\s)\"(\w+):", r'\1"\2":', line)
    dictionary = json.loads(modified)
    print(dictionary)

在您的示例中，运行上面的代码将导致类似的结果：

[{'key0': 'value0', 'key1': 'value1', 'key2': 'value2'}, {'key0': 'value3', 'key1': 'value4', 'key2': 'value5'}, {'key0': 'value6', 'key1': 'value7', 'key2': 'value8'}]

此外，您将可以访问该字典的键和值。

注意上面代码中的“data.txt”文件如下：

[{"key0":"value0" , "key1":"value1", "key2":"value2"}, {"key0":"value3", "key1":"value4", "key2:"value5"}, {"key0":"value6", "key1":"value7", "key2:"value8"}]

I suggest you use the regex module in order to modify the lines and then transform them into a dictionary:

import re
import json
with open("data.txt") as f:
  lines = f.readlines()
  for line in lines:
    modified = re.sub(r"({|\s)\"(\w+):", r'\1"\2":', line)
    dictionary = json.loads(modified)
    print(dictionary)

In your example, running the code above would result in something like:

[{'key0': 'value0', 'key1': 'value1', 'key2': 'value2'}, {'key0': 'value3', 'key1': 'value4', 'key2': 'value5'}, {'key0': 'value6', 'key1': 'value7', 'key2': 'value8'}]

Moreover, you will have access to the keys and values of this dictionary.

Note that the "data.txt" file in the code above is as follows:

[{"key0":"value0" , "key1":"value1", "key2":"value2"}, {"key0":"value3", "key1":"value4", "key2:"value5"}, {"key0":"value6", "key1":"value7", "key2:"value8"}]

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断肠人 2025-01-19 13:58:49

尝试使用 Python 中的 json.loads 方法 json 编码器模块，将 fp（支持 .read() 的文本文件或包含 JSON 文档的二进制文件）反序列化为使用转换的 Python 对象表”。

解码 json 字符串：

import json

str_to_load = '[{"key0":"value0" , "key1":"value1", "key2":"value2"}, {"key0":"value3", "key1":"value4", "key2":"value5"}, {"key0":"value6", "key1":"value7", "key2:"value8"}]'
str_to_load = json.loads(str_to_load)

print(str_to_load[2]['key2'])

输出：
值8

Try using json.loads method from Python json encoder module that "Deserialize fp (a .read()-supporting text file or binary file containing a JSON document) to a Python object using a conversion table".

To decode your json string:

import json

str_to_load = '[{"key0":"value0" , "key1":"value1", "key2":"value2"}, {"key0":"value3", "key1":"value4", "key2":"value5"}, {"key0":"value6", "key1":"value7", "key2:"value8"}]'
str_to_load = json.loads(str_to_load)

print(str_to_load[2]['key2'])

output:
value8

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