Python Parsing key=value from string-CodePudding

I have string like this:

[KEY1=ABC, KEY2=ABC, ... , KEY3={KEY123=ABC, KEY456=ABC}, KEY111=ABC, KEY4=KEY=VALUE&KEY=VALUE&KEY=VALUE]

I want to parse it into a python dict like this

dict = {
   'KEY1': 'ABC',
   'KEY2': 'ABC',
   'KEY3': '{KEY123=ABC, KEY456=ABC}',
   'KEY111': 'ABC',
   'KEY4': 'KEY=VALUE&KEY=VALUE&KEY=VALUE',
}

Note that, the values can contain complex/special chars like /\-@'"

In case 'KEY4'; It can be like a URL GET String format. Example

KE4=id=1&username=xx&url=http://xxx...&ref=1

The following code partially works. It does not parse Values that contains nested key=val. like 'KEY3' above

dict = builtins.dict(re.findall(r'(\S )=(".*?"|\S )', input))

CodePudding user response：

I put your (slightly edited) regex in a function that you can call on the dictionary values to transform nested strings in dictionary as well:

import re
import json

input_str = "[KEY1=ABC, KEY2=ABC, KEY3={KEY123=ABC, KEY456=ABC}, KEY111=ABC]"

def dict_from_str(s):
    return dict(re.findall(r'(\w )=([^{]*?|\{.*?})(?:,|$)', s.strip('[]{}')))

dict_out = dict_from_str(input_str)

for k, v in dict_out.items():
    if '=' in v:
        dict_out[k] = dict_from_str(v)

print(json.dumps(dict_out, indent=4))

Output:

{
    "KEY1": "ABC",
    "KEY2": "ABC",
    "KEY3": {
        "KEY123": "ABC",
        "KEY456": "ABC"
    },
    "KEY111": "ABC"
}

If you have more levels, you could consider writing a recursive function.

Edit: you can handle URLs separately (note that the keys must be unique, unlike your first example):

input_str = "[KEY1=ABC, KEY2=ABC, KEY3={KEY123=ABC, KEY456=ABC}, KEY111=ABC, KEY4=KEY=VALUE&KEY2=VALUE&KEY3=VALUE]"

def dict_from_str(s):
    return dict(re.findall(r'(\w )=([^{]*?|\{.*?})(?:,|$)', s.strip('[]{}')))

def dict_from_url(s):
    return dict(re.findall(r'(\w )=([^=]*?)(?:&|$)', s.strip('[]{}')))

dict_out = dict_from_str(input_str)

for k, v in dict_out.items():
    if '&' in v:
        dict_out[k] = dict_from_url(v)
    elif '=' in v:
        dict_out[k] = dict_from_str(v)

print(json.dumps(dict_out, indent=4))

Output:

{
    "KEY1": "ABC",
    "KEY2": "ABC",
    "KEY3": {
        "KEY123": "ABC",
        "KEY456": "ABC"
    },
    "KEY111": "ABC",
    "KEY4": {
        "KEY": "VALUE",
        "KEY2": "VALUE",
        "KEY3": "VALUE"
    }
}