fix mutability api error

VERSION

@@ -1 +1 @@
-0.6.1
+0.6.3

boilerplate.ini

@@ -2,47 +2,31 @@
 project = smallvectors
 author = Fábio Macêdo Mendes
 email = fabiomacedomendes@gmail.com
-version = 0.4.6
+version = 0.6.2
 license = gpl
 pyname = smallvectors
+has_script = false
+python_version = both
+boilerplate_version = 1
 
 [file hashes]
 .gitignore = iu2Zn1vki51Un7bnWFivjQ==
-
 INSTALL.rst = 9lb/d88HQ0hGezbwoGNTRg==
-
 LICENSE = FuV5NeyW3bl3fBm/fWRkvw==
-
 tasks.py = 6GOUg08jHdzGhTHggdHrsA==
-
 setup.py = 4BUfgPZVm3X66jTMjaROLw==
-
 MANIFEST.in = BR29dThJGj3LpFi457HDsw==
-
 requirements.txt = 9/H6jW0guTB5y4aYQ+29FA==
-
 requirements-dev.txt = IrFEvOtt6TH8c3X1z/Qgrg==
-
 src/smallvectors/__meta__.py = gbgEMe+4FmNbN+z2nX83fw==
-
 src/smallvectors/__main__.py = xpIZEyBOCB/MGQd7ozratA==
-
 src/smallvectors/tests/test_smallvectors.py = nOIxlmSfvN0isYgmfQ9Aog==
-
 docs/conf.py = aYMkaxQn7VwS9OxI8gSesg==
-
 docs/index.rst = N4fyFQVu5mr+VnIghp/imQ==
-
 docs/install.rst = uEvES6MgO5srBNLXAVqL/Q==
-
 docs/license.rst = T7JCt0IDBksEuohsOM3rxQ==
-
 docs/apidoc.rst = wbC8YV52W3pps8wK3+VTlw==
-
 docs/warning.rst = qiipkkPaw0hlzLnokVKg0w==
-
 docs/make.bat = PQXLkE61OdGkBLrufEsxVQ==
-
 docs/Makefile = yt1XIoUMNcKdnqcIy7pcGQ==
-
 

src/smallvectors.egg-info/PKG-INFO

@@ -1,6 +1,6 @@
 Metadata-Version: 1.1
 Name: smallvectors
-Version: 0.6.1
+Version: 0.6.2
 Summary: Linear algebra objects for small dimensions.
 Home-page: http://github.com/fabiommendes/smallvectors/
 Author: Fábio Macêdo Mendes

src/smallvectors/__meta__.py

@@ -1,2 +1,2 @@
-__version__ = '0.6.1'
+__version__ = '0.6.2'
 __author__ = 'Fábio Macêdo Mendes'

src/smallvectors/core/mutability.py

@@ -149,27 +149,31 @@ def get_complementary(cls):
     Return mutable from immutable and vice-versa.
     """
 
+    # Get origin type and its name
     if cls.__origin__ is None:
         origin = cls
     else:
         origin = cls.__origin__
-    mod = sys.modules[cls.__module__]
-
-    # Get class
-    if issubclass(cls, Mutable):
-        is_mutable = False
-        other_origin = getattr(mod, origin.__name__[1:])
+    name = cls.__name__
+    origin_name = origin.__name__
+
+    # Check if the mutability naming convention is followed. If so, compute the
+    # complementary origin name. If not, raise an attribute error.
+    is_mutable = issubclass(cls, Mutable)
+    if is_mutable and not origin_name.startswith('m'):
+        raise AttributeError('no immutable class associated with %s' % name)
+    elif is_mutable:
+        complementary_name = origin_name[1:]
     else:
-        is_mutable = True
-        other_origin = getattr(mod, 'm' + origin.__name__)
+        complementary_name = 'm' + origin_name
 
-    # Apply parameters
-    if (cls.__parameters__ and
-            not all(isinstance(x, type) for x in cls.__parameters__)):
-        other = other_origin[cls.__parameters__]
-    else:
-        other = other_origin
+    # We check for the complementary class in the module that defines the origin
+    # class
+    mod = sys.modules[origin.__module__]
+    complementary_origin = getattr(mod, complementary_name)
 
-    # Return
-    assert issubclass(other, (Mutable if is_mutable else Immutable))
-    return other
+    # Apply parameters, if necessary
+    if cls is origin:
+        return complementary_origin
+    else:
+        return complementary_origin[cls.__parameters__]