JSONDecodeError：期望用双引号括起来的属性名称：第 1 行第 3 列（字符 2）

Question

I dont know why I am getting this error even after I fix the single quotes

HERE IS MY CODE

asd="[{name:'TokenPurchase',inputs:[{type:'address',name:'buyer',indexed:!0},{type:'uint256',name:'eth_sold',indexed:!0},{type:'uint256',name:'tokens_bought',indexed:!0}],anonymous:!1,type:'event'},{name:'EthPurchase',inputs:[{type:'address',name:'buyer',indexed:!0},{type:'uint256',name:'tokens_sold',indexed:!0},{type:'uint256',name:'eth_bought',indexed:!0}],anonymous:!1,type:'event'},{name:'AddLiquidity',inputs:[{type:'address',name:'provider',indexed:!0},{type:'uint256',name:'eth_amount',indexed:!0},{type:'uint256',name:'token_amount',indexed:!0}],anonymous:!1,type:'event'},{name:'RemoveLiquidity',inputs:[{type:'address',name:'provider',indexed:!0},{type:'uint256',name:'eth_amount',indexed:!0},{type:'uint256',name:'token_amount',indexed:!0}],anonymous:!1,type:'event'},{name:'Transfer',inputs:[{type:'address',name:'_from',indexed:!0},{type:'address',name:'_to',indexed:!0},{type:'uint256',name:'_value',indexed:!1}],anonymous:!1,type:'event'},{name:'Approval',inputs:[{type:'address',name:'_owner',indexed:!0},{type:'address',name:'_spender',indexed:!0},{type:'uint256',name:'_value',indexed:!1}],anonymous:!1,type:'event'},{name:'setup',outputs:[],inputs:[{type:'address',name:'token_addr'}],constant:!1,payable:!1,type:'function',gas:175875},{name:'addLiquidity',outputs:[{type:'uint256',name:'out'}],inputs:[{type:'uint256',name:'min_liquidity'},{type:'uint256',name:'max_tokens'},{type:'uint256',name:'deadline'}],constant:!1,payable:!0,type:'function',gas:82605},{name:'removeLiquidity',outputs:[{type:'uint256',name:'out'},{type:'uint256',name:'out'}],inputs:[{type:'uint256',name:'amount'},{type:'uint256',name:'min_eth'},{type:'uint256',name:'min_tokens'},{type:'uint256',name:'deadline'}],constant:!1,payable:!1,type:'function',gas:116814},{name:'__default__',outputs:[],inputs:[],constant:!1,payable:!0,type:'function'},{name:'ethToTokenSwapInput',outputs:[{type:'uint256',name:'out'}],inputs:[{type:'uint256',name:'min_tokens'},{type:'uint256',name:'deadline'}],constant:!1,payable:!0,type:'function',gas:12757},{name:'ethToTokenTransferInput',outputs:[{type:'uint256',name:'out'}],inputs:[{type:'uint256',name:'min_tokens'},{type:'uint256',name:'deadline'},{type:'address',name:'recipient'}],constant:!1,payable:!0,type:'function',gas:12965},{name:'ethToTokenSwapOutput',outputs:[{type:'uint256',name:'out'}],inputs:[{type:'uint256',name:'tokens_bought'},{type:'uint256',name:'deadline'}],constant:!1,payable:!0,type:'function',gas:50455},{name:'ethToTokenTransferOutput',outputs:[{type:'uint256',name:'out'}],inputs:[{type:'uint256',name:'tokens_bought'},{type:'uint256',name:'deadline'},{type:'address',name:'recipient'}],constant:!1,payable:!0,type:'function',gas:50663},{name:'tokenToEthSwapInput',outputs:[{type:'uint256',name:'out'}],inputs:[{type:'uint256',name:'tokens_sold'},{type:'uint256',name:'min_eth'},{type:'uint256',name:'deadline'}],constant:!1,payable:!1,type:'function',gas:47503},{name:'tokenToEthTransferInput',outputs:[{type:'uint256',name:'out'}],inputs:[{type:'uint256',name:'tokens_sold'},{type:'uint256',name:'min_eth'},{type:'uint256',name:'deadline'},{type:'address',name:'recipient'}],constant:!1,payable:!1,type:'function',gas:47712},{name:'tokenToEthSwapOutput',outputs:[{type:'uint256',name:'out'}],inputs:[{type:'uint256',name:'eth_bought'},{type:'uint256',name:'max_tokens'},{type:'uint256',name:'deadline'}],constant:!1,payable:!1,type:'function',gas:50175},{name:'tokenToEthTransferOutput',outputs:[{type:'uint256',name:'out'}],inputs:[{type:'uint256',name:'eth_bought'},{type:'uint256',name:'max_tokens'},{type:'uint256',name:'deadline'},{type:'address',name:'recipient'}],constant:!1,payable:!1,type:'function',gas:50384},{name:'tokenToTokenSwapInput',outputs:[{type:'uint256',name:'out'}],inputs:[{type:'uint256',name:'tokens_sold'},{type:'uint256',name:'min_tokens_bought'},{type:'uint256',name:'min_eth_bought'},{type:'uint256',name:'deadline'},{type:'address',name:'token_addr'}],constant:!1,payable:!1,type:'function',gas:51007},{name:'tokenToTokenTransferInput',outputs:[{type:'uint256',name:'out'}],inputs:[{type:'uint256',name:'tokens_sold'},{type:'uint256',name:'min_tokens_bought'},{type:'uint256',name:'min_eth_bought'},{type:'uint256',name:'deadline'},{type:'address',name:'recipient'},{type:'address',name:'token_addr'}],constant:!1,payable:!1,type:'function',gas:51098},{name:'tokenToTokenSwapOutput',outputs:[{type:'uint256',name:'out'}],inputs:[{type:'uint256',name:'tokens_bought'},{type:'uint256',name:'max_tokens_sold'},{type:'uint256',name:'max_eth_sold'},{type:'uint256',name:'deadline'},{type:'address',name:'token_addr'}],constant:!1,payable:!1,type:'function',gas:54928},{name:'tokenToTokenTransferOutput',outputs:[{type:'uint256',name:'out'}],inputs:[{type:'uint256',name:'tokens_bought'},{type:'uint256',name:'max_tokens_sold'},{type:'uint256',name:'max_eth_sold'},{type:'uint256',name:'deadline'},{type:'address',name:'recipient'},{type:'address',name:'token_addr'}],constant:!1,payable:!1,type:'function',gas:55019},{name:'tokenToExchangeSwapInput',outputs:[{type:'uint256',name:'out'}],inputs:[{type:'uint256',name:'tokens_sold'},{type:'uint256',name:'min_tokens_bought'},{type:'uint256',name:'min_eth_bought'},{type:'uint256',name:'deadline'},{type:'address',name:'exchange_addr'}],constant:!1,payable:!1,type:'function',gas:49342},{name:'tokenToExchangeTransferInput',outputs:[{type:'uint256',name:'out'}],inputs:[{type:'uint256',name:'tokens_sold'},{type:'uint256',name:'min_tokens_bought'},{type:'uint256',name:'min_eth_bought'},{type:'uint256',name:'deadline'},{type:'address',name:'recipient'},{type:'address',name:'exchange_addr'}],constant:!1,payable:!1,type:'function',gas:49532},{name:'tokenToExchangeSwapOutput',outputs:[{type:'uint256',name:'out'}],inputs:[{type:'uint256',name:'tokens_bought'},{type:'uint256',name:'max_tokens_sold'},{type:'uint256',name:'max_eth_sold'},{type:'uint256',name:'deadline'},{type:'address',name:'exchange_addr'}],constant:!1,payable:!1,type:'function',gas:53233},{name:'tokenToExchangeTransferOutput',outputs:[{type:'uint256',name:'out'}],inputs:[{type:'uint256',name:'tokens_bought'},{type:'uint256',name:'max_tokens_sold'},{type:'uint256',name:'max_eth_sold'},{type:'uint256',name:'deadline'},{type:'address',name:'recipient'},{type:'address',name:'exchange_addr'}],constant:!1,payable:!1,type:'function',gas:53423},{name:'getEthToTokenInputPrice',outputs:[{type:'uint256',name:'out'}],inputs:[{type:'uint256',name:'eth_sold'}],constant:!0,payable:!1,type:'function',gas:5542},{name:'getEthToTokenOutputPrice',outputs:[{type:'uint256',name:'out'}],inputs:[{type:'uint256',name:'tokens_bought'}],constant:!0,payable:!1,type:'function',gas:6872},{name:'getTokenToEthInputPrice',outputs:[{type:'uint256',name:'out'}],inputs:[{type:'uint256',name:'tokens_sold'}],constant:!0,payable:!1,type:'function',gas:5637},{name:'getTokenToEthOutputPrice',outputs:[{type:'uint256',name:'out'}],inputs:[{type:'uint256',name:'eth_bought'}],constant:!0,payable:!1,type:'function',gas:6897},{name:'tokenAddress',outputs:[{type:'address',name:'out'}],inputs:[],constant:!0,payable:!1,type:'function',gas:1413},{name:'factoryAddress',outputs:[{type:'address',name:'out'}],inputs:[],constant:!0,payable:!1,type:'function',gas:1443},{name:'balanceOf',outputs:[{type:'uint256',name:'out'}],inputs:[{type:'address',name:'_owner'}],constant:!0,payable:!1,type:'function',gas:1645},{name:'transfer',outputs:[{type:'bool',name:'out'}],inputs:[{type:'address',name:'_to'},{type:'uint256',name:'_value'}],constant:!1,payable:!1,type:'function',gas:75034},{name:'transferFrom',outputs:[{type:'bool',name:'out'}],inputs:[{type:'address',name:'_from'},{type:'address',name:'_to'},{type:'uint256',name:'_value'}],constant:!1,payable:!1,type:'function',gas:110907},{name:'approve',outputs:[{type:'bool',name:'out'}],inputs:[{type:'address',name:'_spender'},{type:'uint256',name:'_value'}],constant:!1,payable:!1,type:'function',gas:38769},{name:'allowance',outputs:[{type:'uint256',name:'out'}],inputs:[{type:'address',name:'_owner'},{type:'address',name:'_spender'}],constant:!0,payable:!1,type:'function',gas:1925},{name:'name',outputs:[{type:'bytes32',name:'out'}],inputs:[],constant:!0,payable:!1,type:'function',gas:1623},{name:'symbol',outputs:[{type:'bytes32',name:'out'}],inputs:[],constant:!0,payable:!1,type:'function',gas:1653},{name:'decimals',outputs:[{type:'uint256',name:'out'}],inputs:[],constant:!0,payable:!1,type:'function',gas:1683},{name:'totalSupply',outputs:[{type:'uint256',name:'out'}],inputs:[],constant:!0,payable:!1,type:'function',gas:1713}]"

asd=asd.replace("\'", "\"")

json.loads(asd)

Answer 1

Okay, so found a way to "fix" the JSON assuming there are only two errors:

1. Double-quotes are missing around key names
2. Numbers prefixed with an exclamation mark ( ! ) seem to be booleans (True/False as 1/0)
   • There are other numbers which don't have the ',': like "gas.1713" near the end.
   • So I've assumed that those are regular numbers, and the '!' indicates booleans
   • There seem to be no other occurrences which are not \0 or \1 (so things like \2 , \5 , \123 , etc. are not present)

Disclaimer: this is not recommended. And I've not made the expressions tolerant of extra allowed spaces in JSON. Just for the sample you provided.

Using regular expressions and string substitution to fix each of these issues, starting with what you have put:

import re

asd = '...'  # from the question

# replace quotes, as you have done, assuming they are only
# around actual strings and not _within_ any strings
asd = asd.replace("\'", "\"")
# becomes:
# [{name:"TokenPurchase",inputs:[{type:"address",name:"buyer",indexed:!0},...]

Add quotes around the keys. Again, assuming the sequence of characters xyz123: only occurs as keys :

fixed_keys = re.sub(r'(\w+):', r'"\1":', asd)
# becomes:
# [{"name":"TokenPurchase","inputs":[{"type":"address","name":"buyer","indexed":!0},...]

Then, convert \1 to true and \0 to false :

fixed_trues = fixed_keys.replace('!1', 'true')
fixed_falses = fixed_trues.replace('!0', 'false')
# [{"name":"TokenPurchase","inputs":[{"type":"address","name":"buyer","indexed":false},...]

It can now be loaded without errors:

fixed = json.loads(fixed_falses)

Sample of fixed :

[{'name': 'TokenPurchase',
  'inputs': [{'type': 'address', 'name': 'buyer', 'indexed': False},
             {'type': 'uint256', 'name': 'eth_sold', 'indexed': False},
             {'type': 'uint256', 'name': 'tokens_bought', 'indexed': False}],
  'anonymous': True,
  'type': 'event'},
 {'name': 'EthPurchase',
  'inputs': [{'type': 'address', 'name': 'buyer', 'indexed': False},
             {'type': 'uint256', 'name': 'tokens_sold', 'indexed': False},
             {'type': 'uint256', 'name': 'eth_bought', 'indexed': False}],
  'anonymous': True,
  'type': 'event'},
 ...
]