json

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()