diff --git a/Lib/tkinter/__init__.py b/Lib/tkinter/__init__.py
--- a/Lib/tkinter/__init__.py
+++ b/Lib/tkinter/__init__.py
@@ -2157,9 +2157,9 @@ class Canvas(Widget, XView, YView):
     def coords(self, *args):
         """Return a list of coordinates for the item given in ARGS."""
         # XXX Should use _flatten on args
-        return map(getdouble,
-                           self.tk.splitlist(
-                   self.tk.call((self._w, 'coords') + args)))
+        return list(map(getdouble,
+                        self.tk.splitlist(
+                            self.tk.call((self._w, 'coords') + args))))
     def _create(self, itemType, args, kw): # Args: (val, val, ..., cnf={})
         """Internal function."""
         args = _flatten(args)