mirror of
https://github.com/python/cpython.git
synced 2024-12-01 11:15:56 +01:00
906b796af8
Co-authored-by: Adam Turner <9087854+AA-Turner@users.noreply.github.com> Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com> Co-authored-by: Alyssa Coghlan <ncoghlan@gmail.com>
83 lines
3.2 KiB
Python
83 lines
3.2 KiB
Python
"""Command-line tool to validate and pretty-print JSON
|
|
|
|
See `json.__main__` for a usage example (invocation as
|
|
`python -m json.tool` is supported for backwards compatibility).
|
|
"""
|
|
import argparse
|
|
import json
|
|
import sys
|
|
|
|
|
|
def main():
|
|
prog = 'python -m json'
|
|
description = ('A simple command line interface for json module '
|
|
'to validate and pretty-print JSON objects.')
|
|
parser = argparse.ArgumentParser(prog=prog, description=description)
|
|
parser.add_argument('infile', nargs='?',
|
|
help='a JSON file to be validated or pretty-printed',
|
|
default='-')
|
|
parser.add_argument('outfile', nargs='?',
|
|
help='write the output of infile to outfile',
|
|
default=None)
|
|
parser.add_argument('--sort-keys', action='store_true', default=False,
|
|
help='sort the output of dictionaries alphabetically by key')
|
|
parser.add_argument('--no-ensure-ascii', dest='ensure_ascii', action='store_false',
|
|
help='disable escaping of non-ASCII characters')
|
|
parser.add_argument('--json-lines', action='store_true', default=False,
|
|
help='parse input using the JSON Lines format. '
|
|
'Use with --no-indent or --compact to produce valid JSON Lines output.')
|
|
group = parser.add_mutually_exclusive_group()
|
|
group.add_argument('--indent', default=4, type=int,
|
|
help='separate items with newlines and use this number '
|
|
'of spaces for indentation')
|
|
group.add_argument('--tab', action='store_const', dest='indent',
|
|
const='\t', help='separate items with newlines and use '
|
|
'tabs for indentation')
|
|
group.add_argument('--no-indent', action='store_const', dest='indent',
|
|
const=None,
|
|
help='separate items with spaces rather than newlines')
|
|
group.add_argument('--compact', action='store_true',
|
|
help='suppress all whitespace separation (most compact)')
|
|
options = parser.parse_args()
|
|
|
|
dump_args = {
|
|
'sort_keys': options.sort_keys,
|
|
'indent': options.indent,
|
|
'ensure_ascii': options.ensure_ascii,
|
|
}
|
|
if options.compact:
|
|
dump_args['indent'] = None
|
|
dump_args['separators'] = ',', ':'
|
|
|
|
try:
|
|
if options.infile == '-':
|
|
infile = sys.stdin
|
|
else:
|
|
infile = open(options.infile, encoding='utf-8')
|
|
try:
|
|
if options.json_lines:
|
|
objs = (json.loads(line) for line in infile)
|
|
else:
|
|
objs = (json.load(infile),)
|
|
finally:
|
|
if infile is not sys.stdin:
|
|
infile.close()
|
|
|
|
if options.outfile is None:
|
|
outfile = sys.stdout
|
|
else:
|
|
outfile = open(options.outfile, 'w', encoding='utf-8')
|
|
with outfile:
|
|
for obj in objs:
|
|
json.dump(obj, outfile, **dump_args)
|
|
outfile.write('\n')
|
|
except ValueError as e:
|
|
raise SystemExit(e)
|
|
|
|
|
|
if __name__ == '__main__':
|
|
try:
|
|
main()
|
|
except BrokenPipeError as exc:
|
|
raise SystemExit(exc.errno)
|