Python新手求助：json.loads触发JSONDecodeError问题排查

Hey there! I see you're just getting started with Python and ran into a JSON parsing error—let's break this down and get you back on track.

What's Causing the Error? #

The error message JSONDecodeError: Expecting property name enclosed in double quotes: line 7 column 5 (char 129) spells out exactly what's wrong: your json_input.json file has a property name that violates JSON syntax rules. JSON requires all property names to be wrapped in double quotes ("), not single quotes ('), and you can't skip quotes entirely for property names. The problem is specifically at line 7, column 5 of your JSON file.

Step-by-Step Fixes #

1. Fix the JSON File Syntax
   Open up json_input.json and jump to line 7. Look for these common mistakes:

   • Property names using single quotes (like 'user_id' instead of "user_id")
   • Property names with no quotes at all (like age: 25 instead of "age": 25)
     Correct those to use double quotes for every property name, and that should resolve the parsing failure.

2. Simplify Your File Reading Code
   Your current code works, but we can make it cleaner and safer with a with statement (it automatically closes the file for you, even if an error pops up). Also, you don't need to read the file content first—json.load() can read directly from the file handle:

   import json
   
   with open("json_input.json", "r") as handle:
       d = json.load(handle)
   print(d)
   

3. Validate Your JSON (Optional but Helpful)
   If you're unsure about other potential syntax issues in your JSON file, you can use a free online JSON validator (just search for "JSON validator" in your browser) to paste your file content and get detailed feedback on any syntax errors.

Example of Valid vs. Invalid JSON #

• Invalid (uses single quotes/unquoted properties):

  {
      'username': 'Luna',
      email: 'luna@example.com'
  }
  

• Valid (follows JSON syntax rules):

  {
      "username": "Luna",
      "email": "luna@example.com"
  }
  

Once you fix the JSON file's syntax, your code should run without that error. Happy coding!

内容的提问来源于stack exchange，提问作者Wyatt_Earp