--- /dev/null
+#!/usr/bin/env python3
+import yacsdecorator
+
+@yacsdecorator.leaf
+def f1(x,y):
+ r = x+y
+ return r
+
+@yacsdecorator.leaf
+def f2(a):
+ r = a + 2
+ return r
+
+@yacsdecorator.leaf
+def f3(x, y):
+ s = x+y
+ p = x*y
+ return s,p
+
+@yacsdecorator.bloc
+def b1():
+ x = f1(x=3,y=4)
+ a,b = f3(x, 2)
+ f2(x)
+ r = f1(a,b)
+ return r
+
+if __name__ == '__main__':
+ r = b1()
+ print("result:", r)