init, still not decided between pygame and blessed

ship.py

@@ -0,0 +1,16 @@
+class Ship():
+    def __init__(self, start_position, end_position, name="ship"):
+        self.start_position = start_position
+        self.end_position = end_position
+        self.name = name
+        self.size = self.calculate_size()
+        self.damaged_parts = []
+
+    def calculate_size(self):
+        if self.start_position[0] == self.end_position[0]: #they are in the same row
+            return abs(int(self.start_position[1]) - int(self.end_position[1]))
+        else: #same column
+            return abs(ord(self.start_position[0]) - ord(self.end_position[0]))
+
+    def is_sunken(self):
+        return self.size == len(self.damaged_parts)