Added better exceptions

src/cpl_query/exceptions.py

@@ -1,3 +1,20 @@
+from enum import Enum
+
+
+# models
+class ExceptionArgument(Enum):
+    list = 'list'
+    func = 'func'
+    type = 'type'
+
+
+# exceptions
+class ArgumentNoneException(Exception):
+
+    def __init__(self, arg: ExceptionArgument):
+        Exception.__init__(self, f'Argument {arg} is None')
+
+
 class InvalidTypeException(Exception):
     pass