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cpython/Lib/json/__main__.py

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"""Command-line tool to validate and pretty-print JSON
Usage::
$ echo '{"json":"obj"}' | python -m json
{
"json": "obj"
}
$ echo '{ 1.2:3.4}' | python -m json
Expecting property name enclosed in double quotes: line 1 column 3 (char 2)
"""
import json.tool
if __name__ == '__main__':
try:
json.tool.main()
except BrokenPipeError as exc:
raise SystemExit(exc.errno)