Merge pull request matplotlib#3719 from jenshnielsen/rcparam_warn_error

ENH : Turn rcparams warning into error and remove knowfail

Author: tacaswell

lib/matplotlib/__init__.py

@@ -834,14 +834,6 @@ def matplotlib_fname():
 _all_deprecated = set(chain(_deprecated_ignore_map,
                             _deprecated_map, _obsolete_set))
 
-_rcparam_warn_str = ("Trying to set {key} to {value} via the {func} "
-                     "method of RcParams which does not validate cleanly. "
-                     "This warning will turn into an Exception in 1.5. "
-                     "If you think {value} should validate correctly for "
-                     "rcParams[{key}] "
-                     "please create an issue on github."
-                     )
-
 
 class RcParams(dict):
 
@@ -861,14 +853,7 @@ class RcParams(dict):
     # validate values on the way in
     def __init__(self, *args, **kwargs):
         for k, v in six.iteritems(dict(*args, **kwargs)):
-            try:
-                self[k] = v
-            except (ValueError, RuntimeError):
-                # force the issue
-                warnings.warn(_rcparam_warn_str.format(key=repr(k),
-                                                       value=repr(v),
-                                                       func='__init__'))
-                dict.__setitem__(self, k, v)
+            self[k] = v
 
     def __setitem__(self, key, val):
         try:
@@ -908,14 +893,7 @@ def __getitem__(self, key):
     # through __setitem__
     def update(self, *args, **kwargs):
         for k, v in six.iteritems(dict(*args, **kwargs)):
-            try:
-                self[k] = v
-            except (ValueError, RuntimeError):
-                # force the issue
-                warnings.warn(_rcparam_warn_str.format(key=repr(k),
-                                                       value=repr(v),
-                                                       func='update'))
-                dict.__setitem__(self, k, v)
+            self[k] = v
 
     def __repr__(self):
         import pprint

lib/matplotlib/tests/test_rcparams.py

@@ -105,8 +105,6 @@ def test_RcParams_class():
     assert ['font.family'] == list(six.iterkeys(rc.find_all('family')))
 
 
-# remove know failure + warnings after merging to master
-@knownfailureif(not (sys.version_info[:2] < (2, 7)))
 def test_rcparams_update():
     if sys.version_info[:2] < (2, 7):
         raise nose.SkipTest("assert_raises as context manager "
@@ -123,8 +121,6 @@ def test_rcparams_update():
             rc.update(bad_dict)
 
 
-# remove know failure + warnings after merging to master
-@knownfailureif(not (sys.version_info[:2] < (2, 7)))
 def test_rcparams_init():
     if sys.version_info[:2] < (2, 7):
         raise nose.SkipTest("assert_raises as context manager "