Which command validates a JSON file using Python's standard tooling?

Which command validates a JSON file using Python's standard tooling?

• A. python json.tool <file>
• B. python -m json.tool <file>
• C. python -m json_validate <file>
• D. python -m json.check <file>

Answer: (B)

The built-in way to validate JSON with Python is to use the json.tool module as a script. Running Python with the -m flag tells it to execute a standard library module as a program, so python -m json.tool reads JSON input, parses it, and will error if the syntax is invalid. Feeding the JSON content from a file (for example via input redirection) makes json.tool parse and pretty-print the JSON if it’s valid. If the JSON is invalid, it prints an error and exits non-zero. This is the correct approach because json.tool is part of Python’s standard library and is specifically designed for validating and formatting JSON. The other options either try to run a non-module form of json.tool or reference non-existent modules, which won’t perform standard-library validation.

The built-in way to validate JSON with Python is to use the json.tool module as a script. Running Python with the -m flag tells it to execute a standard library module as a program, so python -m json.tool reads JSON input, parses it, and will error if the syntax is invalid. Feeding the JSON content from a file (for example via input redirection) makes json.tool parse and pretty-print the JSON if it’s valid. If the JSON is invalid, it prints an error and exits non-zero. This is the correct approach because json.tool is part of Python’s standard library and is specifically designed for validating and formatting JSON. The other options either try to run a non-module form of json.tool or reference non-existent modules, which won’t perform standard-library validation.