Updated the Expression object to include 'wrong_response' and wrote the code needed to start the finding mutations.

json_generator/expression.py

@@ -1,14 +1,20 @@
 class Expression:
 	expression = ""
-	correct_answer = 0
+#	correct_response = 0
+	wrong_response = 0
 	variables = []
 	
-	def __init__(self, expression_string, variables, correct):
+	def __init__(self, expression_string, variables, wrong_response):
 		self.expression = expression_string
 		self.variables = variables
-		self.correct_answer = correct
+		self.wrong_response = wrong_response
 		
 class Variable:
+	name = ""
+	type = ""
+	starting_point = 0
+	ending_point = 0
+	
 	VARIABLE_TYPES = {
 		"i" : "Interest",
 		"I" : "Interest",
@@ -24,6 +30,8 @@ class Variable:
 		
 	@staticmethod
 	def get_variable_type(variable_name):
-		if not variable_name in Variable.VARIABLE_TYPES:
+		if len(variable_name) == 0:
 			return "Unknown"
-		return Variable.VARIABLE_TYPES[variable_name]
+		if not variable_name[0] in Variable.VARIABLE_TYPES:
+			return "Unknown"
+		return Variable.VARIABLE_TYPES[variable_name[0]]