SPDK doc/jsonrpc.md linter of json examples

spdk_jsonrpc_md_lint_json.py

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import re
with open("doc/jsonrpc.md", "r") as file:
    data = file.read()
    examples = re.findall("~~~json(.+?)~~~", data, re.MULTILINE | re.DOTALL)
    for example in examples:
        try:
            json.loads(example)
        except json.decoder.JSONDecodeError:
            for i, x in enumerate(example.splitlines()):
                print(i+2,x)
            raise
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