Added code to parse assignment expressions

parse.py

@@ -1,6 +1,6 @@
 def parse(expr):
 
-	opers = ['+', '-', '*', '/']
+	opers = ['+', '-', '*', '/', '=']
 
 	num_par = 0
 	tokenized = []
@@ -9,19 +9,19 @@ def parse(expr):
 	while index < len(expr):
 		if expr[index] in opers:
 			tokenized.append(expr[index])
+			index += 1
 
 		elif expr[index].isdigit() or expr[index] == '.':
 			while (index < len(expr)) and (expr[index].isdigit() or expr[index] == '.'):
 				temp_string += expr[index]
 				index += 1
 			tokenized.append(temp_string)
-			temp_string = ""
 
 		elif expr[index] == '(':
 			num_par = 1
 			temp_string += expr[index]
 			index += 1
-			while num_par != 0 and index < len(expr):
+			while index < len(expr) and num_par != 0:
 				temp_string += expr[index]
 				if expr[index] == '(':
 					num_par += 1
@@ -30,9 +30,18 @@ def parse(expr):
 				index += 1
 
 			tokenized.append(temp_string)
-			temp_string = ""
 
+		elif expr[index].isalpha(): # If you encounter a variable
+			temp_string += expr[index]
+			index += 1
+			while index < len(expr) and expr[index].isalpha():
+				temp_string += expr[index]
+				index += 1
+			tokenized.append(temp_string)
 
+		else:
 			index += 1
 
+		temp_string = ""
+
 	return tokenized