simplify python test

diff --git a/test/test_std.py b/test/test_std.py
index 3264c5d338e77688560efc9e1ccd62eb40425351..f7bfca625bd630dc5477bca42f880c6976ac4c61 100644 (file)
--- a/test/test_std.py
+++ b/test/test_std.py
@@ -1,15 +1,13 @@
 #!/usr/bin/env python
 
+from __future__ import print_function
 import nlopt
 import numpy as np
 
-print ('nlopt version='+nlopt.__version__)
+print ('nlopt version=', nlopt.__version__)
 
 def f(x, grad):
-    F=x[0]
-    L=x[1]
-    E=x[2]
-    I=x[3]
+    F, L, E, I = x
     D=F*L**3/(3.*E*I)
     return D
 
@@ -27,6 +25,6 @@ xopt = opt.optimize(x)
 
 opt_val = opt.last_optimum_value()
 result = opt.last_optimize_result()
-print ('opt_result='+str(result))
-print ('optimizer='+str(xopt))
-print ('opt_val='+str(opt_val))
+print ('opt_result=', result)
+print ('optimizer=', xopt)
+print ('opt_val=', opt_val)