From 669c861ca297b0da385dd6069492a92d0ee4209a Mon Sep 17 00:00:00 2001
From: nrubin29 <nrubin29@gmail.com>
Date: Sun, 10 Dec 2017 16:35:06 -0500
Subject: [PATCH] Fixed an issue caused by cleaning up the Value superclass.
 Fixed an issue with the det function not working for 1x1 matrices.

---
 common.py   |  2 ++
 vartypes.py | 18 ++++++++++++------
 2 files changed, 14 insertions(+), 6 deletions(-)

diff --git a/common.py b/common.py
index cd77460..09b39fb 100644
--- a/common.py
+++ b/common.py
@@ -119,6 +119,8 @@ def key_at(self, i):
     'MUL': 'mul',
 }
 
+operations = ('pos', 'neg', 'add', 'sub', 'mul', 'div', 'mod', 'pow', 'sqrt', 'exp', 'identity', 'det', 'trans', 'cof', 'adj', 'inv', 'rref', 'trnsform', 'solve', 'ls', 'eval')
+
 
 class EvaluationException(Exception):
     pass
diff --git a/vartypes.py b/vartypes.py
index 87baebc..dd8ad7a 100644
--- a/vartypes.py
+++ b/vartypes.py
@@ -1,24 +1,30 @@
 import copy
+import functools
 import math
 from abc import ABCMeta
 from typing import List
 
-from common import EvaluationException
+from common import EvaluationException, operations
 from matrix import MatrixTransformer, DynamicVector
 
 
+def raise_exception(tpe, op):
+    raise EvaluationException('{} does not have operation {}'.format(tpe, op))
+
+
 class Value(metaclass=ABCMeta):
     __slots__ = ('type', 'value')
 
     def __init__(self):
         self.type = self.__class__.__name__
 
+        for op in operations:
+            if not hasattr(self, op):
+                setattr(self, op, functools.partial(raise_exception, tpe=self.type, op=op))
+
     def __str__(self):
         return str(self.value)
 
-    def __getattr__(self, item):
-        raise EvaluationException('{} does not have operation {}'.format(self.type, item))
-
 
 class VariableValue(Value):
     def __init__(self, data):
@@ -141,8 +147,8 @@ def det(self):
 
     @staticmethod
     def _det(matrix: List[List[float]]) -> float:
-        if len(matrix) is 2:
-            return (matrix[0][0] * matrix[1][1]) - (matrix[0][1] * matrix[1][0])
+        if len(matrix) is 1:
+            return matrix[0][0]
 
         cofactors = []