define a resource class for every entity that needs to be controlled on the game map

entities/resource.py

@@ -0,0 +1,18 @@
+class BrSimResource():
+
+  def __init__(self):
+    self.coord_x= 0
+    self.coord_y= 0
+
+  def is_player(self):
+    return False
+  
+  def is_item(self):
+    return False
+
+  def get_coordinates(self):
+    return self.coord_x, self.coord_y
+
+  def set_coordinates(self, x, y):
+    self.coord_x= x
+    self.coord_y= y