Awesome json tool doesn't work anymore in Python 3 (needs tests?).
http://stackoverflow.com/questions/352098/how-to-pretty-print-json-script

C:\Python27>python -m json.tool stdlibx.json
{
    "distutils": [
        "Doc/distutils",
        "Lib/distutils",
        "Lib/test/test_distutils.py"
    ],
    "json": [
        "Doc/library/json.rst",
        "Lib/json",
        "Lib/test/json_tests",
        "Lib/test/test_json.py"
    ]
}

C:\Python33>python -m json.tool stdlibx.json
Traceback (most recent call last):
  File "C:\Python33\lib\runpy.py", line 160, in _run_module_as_main
    "__main__", fname, loader, pkg_name)
  File "C:\Python33\lib\runpy.py", line 73, in _run_code
    exec(code, run_globals)
  File "C:\Python33\lib\json\tool.py", line 37, in <module>
    main()
  File "C:\Python33\lib\json\tool.py", line 29, in main
    obj = json.load(infile)
  File "C:\Python33\lib\json\__init__.py", line 264, in load
    parse_constant=parse_constant, object_pairs_hook=object_pairs_hook, **kw)
  File "C:\Python33\lib\json\__init__.py", line 309, in loads
    return _default_decoder.decode(s)
  File "C:\Python33\lib\json\decoder.py", line 352, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
TypeError: can't use a string pattern on a bytes-like object

Here is a simple patch.

Lib/json/tool.py is triggering a ResourceWarning.

Patch attached with a test.

Tests added. They fail until issue16333 will be resolved.

Oops. This issue becomes very popular.

Berker and me wrote the different tests. I were add a separate test file because json.tool should not be tested for both C and Python implementation and because json tests already splitted on many files. Berker tests using json.tool as a filter. Both tests should be merged. Of course, using a `with` for open files is a good idea.

Here is a merged tests.

New changeset 08e5973fdc7e by Ezio Melotti in branch '2.7':
#16549: Add tests for json.tools.  Initial patch by Berker Peksag and Serhiy Storchaka.
http://hg.python.org/cpython/rev/08e5973fdc7e

New changeset 44c544809e6c by Ezio Melotti in branch '3.2':
#16549: Make json.tool work again on Python 3 and add tests.  Initial patch by Berker Peksag and Serhiy Storchaka.
http://hg.python.org/cpython/rev/44c544809e6c

New changeset 1e2ae5e01963 by Ezio Melotti in branch '3.3':
#16549: merge with 3.2.
http://hg.python.org/cpython/rev/1e2ae5e01963

New changeset cdeca27b32e5 by Ezio Melotti in branch 'default':
#16549: merge with 3.3.
http://hg.python.org/cpython/rev/cdeca27b32e5

Fixed, thanks for the patches!

New changeset 4102c1a02417 by Ezio Melotti in branch '2.7':
#16549: fix test failures on Windows.
http://hg.python.org/cpython/rev/4102c1a02417

New changeset 4ec9f0b0f8f1 by Ezio Melotti in branch '3.2':
#16549: fix test failures on Windows.
http://hg.python.org/cpython/rev/4ec9f0b0f8f1

New changeset e26345437f9f by Ezio Melotti in branch '3.3':
#16549: merge with 3.2.
http://hg.python.org/cpython/rev/e26345437f9f

New changeset 2a73d9e64d34 by Ezio Melotti in branch 'default':
#16549: merge with 3.3.
http://hg.python.org/cpython/rev/2a73d9e64d34

+1

2 tests fail (only on 2.7 branch) when `make test` runs test suite the second time:

======================================================================
ERROR: test_infile_outfile (json.tests.test_tool.TestTool)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/var/tmp/portage/dev-lang/python-2.7.7_pre20131201/work/python-2.7.7_pre20131201/Lib/json/tests/test_tool.py", line 64, in test_infile_outfile
    rc, out, err = assert_python_ok('-m', 'json.tool', infile, outfile)
  File "/var/tmp/portage/dev-lang/python-2.7.7_pre20131201/work/python-2.7.7_pre20131201/Lib/test/script_helper.py", line 55, in assert_python_ok
    return _assert_python(True, *args, **env_vars)
TypeError: 'NoneType' object is not callable

======================================================================
ERROR: test_infile_stdout (json.tests.test_tool.TestTool)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/var/tmp/portage/dev-lang/python-2.7.7_pre20131201/work/python-2.7.7_pre20131201/Lib/json/tests/test_tool.py", line 57, in test_infile_stdout
    rc, out, err = assert_python_ok('-m', 'json.tool', infile)
  File "/var/tmp/portage/dev-lang/python-2.7.7_pre20131201/work/python-2.7.7_pre20131201/Lib/test/script_helper.py", line 55, in assert_python_ok
    return _assert_python(True, *args, **env_vars)
TypeError: 'NoneType' object is not callable

======================================================================

This doesn't look related to json tests. Are there other tests failures with similar symptoms (_assert_python is None)?

No other tests fail in this way.

Somehow these errors do not occur today. Maybe they were side effects of other failures in test_json. Closing for now.