AppPkg/Applications/Python/Python-2.7.10/Lib/json/tool.py

   1 r"""Command-line tool to validate and pretty-print JSON
   2
   3 Usage::
   4
   5     $ echo '{"json":"obj"}' | python -m json.tool
   6     {
   7         "json": "obj"
   8     }
   9     $ echo '{ 1.2:3.4}' | python -m json.tool
  10     Expecting property name enclosed in double quotes: line 1 column 3 (char 2)
  11
  12 """
  13 import sys
  14 import json
  15
  16 def main():
  17     if len(sys.argv) == 1:
  18         infile = sys.stdin
  19         outfile = sys.stdout
  20     elif len(sys.argv) == 2:
  21         infile = open(sys.argv[1], 'rb')
  22         outfile = sys.stdout
  23     elif len(sys.argv) == 3:
  24         infile = open(sys.argv[1], 'rb')
  25         outfile = open(sys.argv[2], 'wb')
  26     else:
  27         raise SystemExit(sys.argv[0] + " [infile [outfile]]")
  28     with infile:
  29         try:
  30             obj = json.load(infile)
  31         except ValueError, e:
  32             raise SystemExit(e)
  33     with outfile:
  34         json.dump(obj, outfile, sort_keys=True,
  35                   indent=4, separators=(',', ': '))
  36         outfile.write('\n')
  37
  38
  39 if __name__ == '__main__':
  40     main()