ch08, 09, 10: example files

09-closure-deco/stacked.py

@@ -0,0 +1,36 @@
+def first(f):
+    print(f'apply first({f.__name__})')
+
+    def inner1st(n):
+        result = f(n)
+        print(f'inner1({n}): called {f.__name__}({n}) -> {result}')
+        return result
+    return inner1st
+
+
+def second(f):
+    print(f'apply second({f.__name__})')
+
+    def inner2nd(n):
+        result = f(n)
+        print(f'inner2({n}): called {f.__name__}({n}) -> {result}')
+        return result
+    return inner2nd
+
+
+@first
+@second
+def double(n):
+    return n * 2
+
+
+print(double(3))
+
+
+def double_(n):
+    return n * 2
+
+
+double_ = first(second(double_))
+
+print(double_(3))