MNT: yet more compatibility fixes

tacaswell · jankatins · commit 00929b9ad0c6 · 2015-08-31T12:06:49.000+02:00
In python &gt; 3.2 `functools.update_wrapper` (which backs the `wraps`
decorator) adds `__wrapped__` attribute to the returned function to
provide easy access to the base function.  Mock this up for legacy
versions of python.
diff --git a/lib/matplotlib/__init__.py b/lib/matplotlib/__init__.py
@@ -1590,9 +1590,11 @@ def param(func):
         new_sig = None
         ver_info = sys.version_info
         # py2.6 compatible version, use line below as soon as we can
-        _python_has_signature = ver_info[0] > 2 and ver_info[1] > 2
-        # _python_has_signature = ver_info.major > 2 and ver_info.minor > 2
-        if not _python_has_signature:
+        python_has_signature = ver_info[0] > 2 and ver_info[1] > 2
+        # python_has_signature = ver_info.major > 2 and ver_info.minor > 2
+        python_has_wrapped = ver_info[0] > 2 and ver_info[1] > 1
+        # python_has_wrapped = ver_info.major > 2 and ver_info.minor > 1
+        if not python_has_signature:
             arg_spec = inspect.getargspec(func)
             _arg_names = arg_spec.args
             _has_no_varargs = arg_spec.varargs is None
@@ -1791,6 +1793,8 @@ def inner(ax, *args, **kwargs):
             _repl = _repl.format(names="', '".join(replace_names))
         inner.__doc__ = (pre_doc +
                          _DATA_DOC_APPENDIX.format(replaced=_repl))
+        if not python_has_wrapped:
+            inner.__wrapped__ = func
         if new_sig is not None:
             inner.__signature__ = new_sig
         return inner
