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Diffstat (limited to 'modules/language/python/module/json/tool.py')
-rw-r--r-- | modules/language/python/module/json/tool.py | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/modules/language/python/module/json/tool.py b/modules/language/python/module/json/tool.py new file mode 100644 index 0000000..c55a4b4 --- /dev/null +++ b/modules/language/python/module/json/tool.py @@ -0,0 +1,52 @@ +module(json,tool) + +r"""Command-line tool to validate and pretty-print JSON + +Usage:: + + $ echo '{"json":"obj"}' | python -m json.tool + { + "json": "obj" + } + $ echo '{ 1.2:3.4}' | python -m json.tool + Expecting property name enclosed in double quotes: line 1 column 3 (char 2) + +""" +import argparse +import collections +import json +import sys + + +def main(): + prog = 'python -m json.tool' + 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='?', type=argparse.FileType(), + help='a JSON file to be validated or pretty-printed') + parser.add_argument('outfile', nargs='?', type=argparse.FileType('w'), + 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') + options = parser.parse_args() + + infile = options.infile or sys.stdin + outfile = options.outfile or sys.stdout + sort_keys = options.sort_keys + with infile: + try: + if sort_keys: + obj = json.load(infile) + else: + obj = json.load(infile, + object_pairs_hook=collections.OrderedDict) + 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__': + main() |