add context to signature mangling errors

numpydoc/docscrape.py

@@ -331,9 +331,19 @@ def _parse(self):
                 section = (s.capitalize() for s in section.split(' '))
                 section = ' '.join(section)
                 if self.get(section):
-                    msg = ("The section %s appears twice in the docstring." %
-                           section)
-                    raise ValueError(msg)
+                    if hasattr(self, '_obj'):
+                        # we know where the docs came from:
+                        try:
+                            filename = inspect.getsourcefile(self._obj)
+                        except TypeError:
+                            filename = None
+                        msg = ("The section %s appears twice in "
+                               "the docstring of %s in %s." %
+                               (section, self._obj, filename))
+                        raise ValueError(msg)
+                    else:
+                        msg = ("The section %s appears twice" % section)
+                        raise ValueError(msg)
 
             if section in ('Parameters', 'Returns', 'Yields', 'Raises',
                            'Warns', 'Other Parameters', 'Attributes',

numpydoc/numpydoc.py

@@ -113,7 +113,6 @@ def mangle_signature(app, what, name, obj, options, sig, retann):
 
     if not hasattr(obj, '__doc__'):
         return
-
     doc = SphinxDocString(pydoc.getdoc(obj))
     sig = doc['Signature'] or getattr(obj, '__text_signature__', None)
     if sig:

numpydoc/tests/test_docscrape.py

@@ -1,8 +1,8 @@
 # -*- encoding:utf-8 -*-
 from __future__ import division, absolute_import, print_function
 
-import sys, textwrap
-import io
+import sys
+import textwrap
 
 import jinja2
 
@@ -12,8 +12,10 @@
     ClassDoc,
     ParseError
 )
-from numpydoc.docscrape_sphinx import SphinxDocString, SphinxClassDoc
-from nose.tools import *
+from numpydoc.docscrape_sphinx import (SphinxDocString, SphinxClassDoc,
+                                       SphinxFunctionDoc)
+from nose.tools import (assert_equal, assert_raises, assert_list_equal,
+                        assert_true)
 
 if sys.version_info[0] >= 3:
     sixu = lambda s: s
@@ -232,6 +234,55 @@ def test_section_twice():
 """
     assert_raises(ValueError, NumpyDocString, doc_text)
 
+    # if we have a numpydoc object, we know where the error came from
+    class Dummy(object):
+        """
+        Dummy class.
+
+        Notes
+        -----
+        First note.
+
+        Notes
+        -----
+        Second note.
+
+        """
+        def spam(self, a, b):
+            """Spam\n\nSpam spam."""
+            pass
+
+        def ham(self, c, d):
+            """Cheese\n\nNo cheese."""
+            pass
+
+    def dummy_func(arg):
+        """
+        Dummy function.
+
+        Notes
+        -----
+        First note.
+
+        Notes
+        -----
+        Second note.
+        """
+
+    try:
+        SphinxClassDoc(Dummy)
+    except ValueError as e:
+        # python 3 version or python 2 version
+        assert_true("test_section_twice.<locals>.Dummy" in str(e)
+                    or 'test_docscrape.Dummy' in str(e))
+
+    try:
+        SphinxFunctionDoc(dummy_func)
+    except ValueError as e:
+        # python 3 version or python 2 version
+        assert_true("test_section_twice.<locals>.dummy_func" in str(e)
+                    or 'function dummy_func' in str(e))
+
 
 def test_notes():
     assert doc['Notes'][0].startswith('Instead')
@@ -969,6 +1020,8 @@ def test_templated_sections():
     """)
 
 
+
+
 if __name__ == "__main__":
     import nose
     nose.run()