将 Erlang 数据解析为 Python 字典

Question

我有一个 erlang 脚本，我想从中获取一些数据并将其存储在 python 字典中。 很容易解析脚本以获得这样的字符串：

    {userdata,
     [{tags,
       [#dt{number=111},
        #mp{id='X23.W'}]},
      {log,
       'LG22'},
      {instruction,
       "String that can contain characters like -, _ or numbers"}
     ]
    }.

想要的结果：

userdata = {"tags": {"dt": {"number": 111}, "mp": {"id": "X23.W"}},
            "log": "LG22",
            "instruction": "String that can contain characters like -, _ or numbers"}
# "#" mark for data in "tags" is not required in this structure. 
# Also value for "tags" can be any iterable structure: tuple, list or dictionary.

但我不确定如何将这些数据传输到 python 字典中。 我的第一个想法是使用json.loads但它需要很多修改（将单词放入引号中，将“,”替换为“:”等等）。

此外，userdata 中的键不限于某个池。 在这种情况下，有“标签”、“日志”和“指令”，但可以有更多，例如。 'slogan'、'ids' 等。此外，我不确定顺序。 我假设密钥可以以随机顺序出现。

我的代码（它不适用于id='X23.W'所以我从输入中删除了 '.'）：

import re
import json
in_ = """{userdata, [{tags, [#dt{number=111}, #mp{id='X23W'}]}, {log, 'LG22'}, {instruction, "String that can contain characters like -, _ or numbers"}]}"""

buff = in_.replace("{userdata, [", "")[:-2]

re_helper = re.compile(r"(#\w+)")
buff = re_helper.sub(r'\1:', buff)

partition = buff.partition("instruction")
section_to_replace = partition[0]
replacer = re.compile(r"(\w+)")
match = replacer.sub(r'"\1"', section_to_replace)
buff = ''.join([match, '"instruction"', partition[2]])
buff = buff.replace("#", "")
buff = buff.replace('",', '":')

buff = buff.replace("}, {", "}, \n{")
buff = buff.replace("=", ":")
buff = buff.replace("'", "")
temp = buff.split("\n")
userdata = {}
buff = temp[0][:-2]
buff = buff.replace("[", "{")
buff = buff.replace("]", "}")

userdata .update(json.loads(buff))
for i, v in enumerate(temp[1:]):
    v = v.strip()
    if v.endswith(","):
        v = v[:-1]
    userdata .update(json.loads(v))

print(userdata)

输出：

{'tags': {'dt': {'number': '111'}, 'mp': {'id': 'X23W'}}, 'instruction': 'String that can contain characters like -, _ or numbers', 'log': 'LG22'}

Answer 1

import json
import re
in_ = """{userdata, [{tags, [#dt{number=111}, #mp{id='X23.W'}]}, {log, 'LG22'}, {instruction, "String that can contain characters like -, _ or numbers"}]}"""


qouted_headers = re.sub(r"\{(\w+),", r'{"\1":', in_)
changed_hashed_list_to_dict = re.sub(r"\[(#.*?)\]", r'{\1}', qouted_headers)

hashed_variables = re.sub(r'#(\w+)', r'"\1":', changed_hashed_list_to_dict)
equality_signes_replaced_and_quoted = re.sub(r'{(\w+)=', r'{"\1":', hashed_variables)
replace_single_qoutes = equality_signes_replaced_and_quoted.replace('\'', '"')

result = json.loads(replace_single_qoutes)
print(result)

产生：

{'userdata': [{'tags': {'dt': {'number': 111}, 'mp': {'id': 'X23.W'}}}, {'log': 'LG22'}, {'instruction': 'String that can contain characters like -, _ or numbers'}]}