For reference, it was:
  python-rdflib-3.2.3-3.fc19
the failure was in %check:

======================================================================
FAIL: Doctest: rdflib
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/usr/lib/python2.7/doctest.py", line 2201, in runTest
    raise self.failureException(self.format_failure(new.getvalue()))
AssertionError: Failed doctest test for rdflib
  File "/builddir/build/BUILD/rdflib-3.2.3/rdflib/__init__.py", line 0, in rdflib
----------------------------------------------------------------------
File "/builddir/build/BUILD/rdflib-3.2.3/rdflib/__init__.py", line 17, in rdflib
Failed example:
    result = g.parse("http://www.w3.org/2000/10/swap/test/meet/white.rdf")
Exception raised:
    Traceback (most recent call last):
      File "/usr/lib/python2.7/doctest.py", line 1289, in __run
        compileflags, 1) in test.globs
      File "<doctest rdflib[2]>", line 1, in <module>
        result = g.parse("http://www.w3.org/2000/10/swap/test/meet/white.rdf")
      File "/builddir/build/BUILD/rdflib-3.2.3/rdflib/graph.py", line 910, in parse
        data=data, format=format)
      File "/builddir/build/BUILD/rdflib-3.2.3/rdflib/parser.py", line 162, in create_input_source
        input_source = URLInputSource(absolute_location, format)
      File "/builddir/build/BUILD/rdflib-3.2.3/rdflib/parser.py", line 93, in __init__
        file = urlopen(req)
      File "/usr/lib/python2.7/urllib2.py", line 126, in urlopen
        return _opener.open(url, data, timeout)
      File "/usr/lib/python2.7/urllib2.py", line 400, in open
        response = self._open(req, data)
      File "/usr/lib/python2.7/urllib2.py", line 418, in _open
        '_open', req)
      File "/usr/lib/python2.7/urllib2.py", line 378, in _call_chain
        result = func(*args)
      File "/usr/lib/python2.7/urllib2.py", line 1207, in http_open
        return self.do_open(httplib.HTTPConnection, req)
      File "/usr/lib/python2.7/urllib2.py", line 1177, in do_open
        raise URLError(err)
    URLError: <urlopen error [Errno -2] Name or service not known>
----------------------------------------------------------------------
File "/builddir/build/BUILD/rdflib-3.2.3/rdflib/__init__.py", line 19, in rdflib
Failed example:
    print("graph has %s statements." % len(g))
Expected:
    graph has 19 statements.
Got:
    graph has 0 statements.
Running nose with: --attr= test rdflib --where=./ --doctest-extension=.doctest
----------------------------------------------------------------------
Ran 709 tests in 54.659s
FAILED (SKIP=17, failures=1)

For some reasons it seems to have ignored the sed command launch before that deactivate the run of the tests in the documentation (which I placed there for that exact problem)

Adding "-v" to the run_tests.py passes it on to the nose invocation and logs the names of the tests being executed.  In particular, it's clear that doctests *are* getting run even with the sed command from ed5650665df98c492b400cf6f7d3adf4b4e87e3f (which did successfully modify run_tests.py).

A better fix may be to disable just the tests that go to the network, which seem to be these two:
  ./rdflib/__init__.py:18:    >>> result = g.parse("http://www.w3.org/2000/10/swap/test/meet/white.rdf")
  ./test/test_rules.py:63:            f.parse("http://eikeon.com/")

I'm investigating a way of doing that.  I tried patching to add this directive:
  # doctest: +SKIP
but that works per-line.

Just wondering, did you try with the latest version? I saw upstream released one but I didn't have time to look into it yet.

(In reply to comment #4)
> Just wondering, did you try with the latest version? I saw upstream released
> one but I didn't have time to look into it yet.

I haven't tried yet; this is just with 3.2.3 in "master"

The issue is that there's a setup.cfg containing:
  [nosetests]
  attr = !known_issue,!non_core,
  verbosity = 1
  with-doctest = 1

and that "with-doctest = 1" is forcing the option to be on, with:
    'enable_plugin_doctest': True

Commenting out that line *does* turn them off though (assuming the existing sed changes)
(I initially tried editing that line to "with-doctest = 0", and that didn't work).

Note to self: "--collect-only" is *much* faster to run
[this took a *lot* of debugging]

Fix committed to git to master (for f20) as:
http://pkgs.fedoraproject.org/cgit/python-rdflib.git/commit/?id=70134fdca596f0bdc557848fd8efb4c1c52e1c7b

Building python-rdflib-3.2.3-4.fc20 for rawhide
Task info: http://koji.fedoraproject.org/koji/taskinfo?taskID=5182657

(In reply to comment #6)
> Building python-rdflib-3.2.3-4.fc20 for rawhide
> Task info: http://koji.fedoraproject.org/koji/taskinfo?taskID=5182657

This succeeeded, and reviewing the build logs shows that the doctests were indeed *not* run.

I pushed the change to the f19 branch also