And this file is also needed for the previous commit.

backend/Profession.py

@@ -0,0 +1,13 @@
+#!/usr/bin/env python
+
+class Profession(object):
+    """
+    Holds the information relevant for a profession.
+    Has self.Name, a string with the name of the profession,
+      and self.Costs, a list of (SkillName,CostList) tuples.
+    """
+    def __init__(self,Name):
+        self.Name = Name
+        self.Costs = []
+    def AddCost(self,Name,Costs):
+        self.Costs.append((Name,Costs))