Merge pull request #4758 from takluyver/testing-py34

Python 3.4 fixes

IPython/nbconvert/filters/tests/test_citation.py

@@ -11,6 +11,7 b''
 #-----------------------------------------------------------------------------
 
 from ..citation import citation2latex
+from nose.tools import assert_equal
 
 #-----------------------------------------------------------------------------
 # Tests
@@ -51,8 +52,8 b' Lorem ipsum dolor sit amet, consectetur adipiscing elit'
 def test_citation2latex():
     """Are citations parsed properly?"""
     try:
-        import lxml
+        from lxml import html  #analysis:ignore
     except ImportError:
-        assert test_md == citation2latex(test_md) 
+        assert_equal(test_md, citation2latex(test_md))
     else:
-        assert test_md_parsed == citation2latex(test_md)
+        assert_equal(test_md_parsed, citation2latex(test_md))

IPython/utils/tests/test_text.py

@@ -16,6 +16,7 b' from __future__ import print_function'
 import os
 import math
 import random
+import sys
 
 import nose.tools as nt
 
@@ -108,6 +109,11 b' def eval_formatter_no_slicing_check(f):'
     s = f.format('{stuff[slice(1,4)]}', **ns)
     nt.assert_equal(s, 'ell')
     
+    if sys.version_info >= (3, 4):
+        # String formatting has changed in Python 3.4, so this now works.
+        s = f.format("{a[:]}", a=[1, 2])
+        nt.assert_equal(s, "[1, 2]")
+    else:
     nt.assert_raises(SyntaxError, f.format, "{a[:]}")
 
 def test_eval_formatter():

IPython/utils/text.py

@@ -517,6 +517,9 b' class EvalFormatter(Formatter):'
         v = eval(name, kwargs)
         return v, name
 
+#XXX: As of Python 3.4, the format string parsing no longer splits on a colon
+# inside [], so EvalFormatter can handle slicing. Once we only support 3.4 and
+# above, it should be possible to remove FullEvalFormatter.
 
 @skip_doctest_py3
 class FullEvalFormatter(Formatter):