diff --git a/samples/roses/clroses.py b/samples/roses/clroses.py
index 51ba2947..1d7ea3dc 100644
--- a/samples/roses/clroses.py
+++ b/samples/roses/clroses.py
@@ -107,7 +107,7 @@ class rose:
         if stop >= self.endpt:
             stop = self.endpt
             keep_running = False
-        for i in range (self.nextpt, stop + 1):
+        for i in range (self.nextpt, int(stop + 1)):
             theta = (self.style * i) % self.nvec
             r = self.cos_table[(self.petals * theta) % self.nvec]
             line.append((r * self.cos_table[theta], r * self.sin_table[theta]))
@@ -159,7 +159,7 @@ class rose:
 
         new_state = self.INT_DRAW
         self.takesvec = self.nvec / self.gcd(self.nvec, self.style)
-        if not self.takesvec & 1 and self.petals & 1:
+        if not int(self.takesvec) & 1 and int(self.petals) & 1:
             self.takesvec /= 2
         if self.cmd_state == self.CMD_GO:
             if self.minvec > self.takesvec or self.maxvec < self.takesvec:
diff --git a/samples/roses/wxroses.py b/samples/roses/wxroses.py
index 7bfbdea5..a12a7103 100644
--- a/samples/roses/wxroses.py
+++ b/samples/roses/wxroses.py
@@ -453,7 +453,7 @@ class MyFrame(wx.Frame, clroses.rose):
     # Command buttons change their names based on the whether we're in auto
     # or manual mode.
     def AppCmdLabels(self, labels):
-        for name, label in map(None, ('Go', 'Redraw', 'Backward', 'Forward'), labels):
+        for name, label in zip(('Go', 'Redraw', 'Backward', 'Forward'), labels):
             ctrl_buttons[name].SetLabel(label)
             ctrl_buttons[name].SetForegroundColour(self.labelColours[label])