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bpo-31553: add --json-lines option to json.tool (#10051)

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* add jsonlines option to json.tool

* code review

* fix:avoid read infile after it close

* improve doc in whatsnew 3.8
This commit is contained in:
HongWeipeng 2018-11-07 18:09:32 +08:00 • committed by Serhiy Storchaka
parent 0e7497cb46
commit f194479949
5 changed files with 53 additions and 5 deletions
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16
Lib/json/tool.py
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@ -26,19 +26,25 @@ def main():
help='write the output of infile to outfile')
parser.add_argument('--sort-keys', action='store_true', default=False,
help='sort the output of dictionaries alphabetically by key')
parser.add_argument('--json-lines', action='store_true', default=False,
help='parse input using the jsonlines format')
options = parser.parse_args()
infile = options.infile or sys.stdin
outfile = options.outfile or sys.stdout
sort_keys = options.sort_keys
with infile:
json_lines = options.json_lines
with infile, outfile:
try:
obj = json.load(infile)
if json_lines:
objs = (json.loads(line) for line in infile)
else:
objs = (json.load(infile), )
for obj in objs:
json.dump(obj, outfile, sort_keys=sort_keys, indent=4)
outfile.write('\n')
except ValueError as e:
raise SystemExit(e)
with outfile:
json.dump(obj, outfile, sort_keys=sort_keys, indent=4)
outfile.write('\n')
if __name__ == '__main__':