Make code compatible with python3.

display.py

@@ -23,15 +23,15 @@ class Display():
         try:
             self.viewer=gepetto.corbaserver.Client()
         except:
-            print "Error while starting the viewer client. "
-            print "Check whether Gepetto-viewer is properly started"
+            print("Error while starting the viewer client. ")
+            print("Check whether Gepetto-viewer is properly started")
 
         # Open a window for displaying your model.
         try:
             # If the window already exists, do not do anything.
             windowID = self.viewer.gui.getWindowID (windowName)
-            print "Warning: window '"+windowName+"' already created."
-            print "The previously created objects will not be destroyed and do not have to be created again."
+            print("Warning: window '"+windowName+"' already created.")
+            print("The previously created objects will not be destroyed and do not have to be created again.")
         except:
             # Otherwise, create the empty window.
             windowID = self.viewer.gui.createWindow (windowName)

example_scipy.py

@@ -19,21 +19,21 @@ class CallbackLogger:
      def __init__(self):
           self.nfeval = 1
      def __call__(self,x):
-          print '===CBK=== {0:4d}   {1: 3.6f}   {2: 3.6f}    {3: 3.6f}'.format(self.nfeval, x[0], x[1], cost(x))
+          print('===CBK=== {0:4d}   {1: 3.6f}   {2: 3.6f}    {3: 3.6f}'.format(self.nfeval, x[0], x[1], cost(x)))
           self.nfeval += 1
 
 x0 = np.array([0.0,0.0])
 # Optimize cost without any constraints in BFGS, with traces.
 xopt_bfgs = fmin_bfgs(cost, x0, callback=CallbackLogger())
-print '\n *** Xopt in BFGS = ',xopt_bfgs,'\n\n\n\n'
+print('\n *** Xopt in BFGS = ',xopt_bfgs,'\n\n\n\n')
 
 # Optimize cost without any constraints in CLSQ
 xopt_lsq = fmin_slsqp(cost,[-1.0,1.0], iprint=2, full_output=1)
-print '\n *** Xopt in LSQ = ',xopt_lsq,'\n\n\n\n'
+print('\n *** Xopt in LSQ = ',xopt_lsq,'\n\n\n\n')
 
 # Optimize cost with equality and inequality constraints in CLSQ
 xopt_clsq = fmin_slsqp(cost,[-1.0,1.0],
                        f_eqcons=constraint_eq, f_ieqcons=constraint_ineq,
                        iprint=2, full_output=1)
-print '\n *** Xopt in c-lsq = ',xopt_clsq,'\n\n\n\n'
+print('\n *** Xopt in c-lsq = ',xopt_clsq,'\n\n\n\n')