wikipedia pictures download example

control/adder/soma_deco.py

@@ -0,0 +1,47 @@
+
+if 'raw_input' in dir(__builtins__):
+    input = raw_input  # para funcionar com Python 2
+
+def ler_parcela():
+    parcela = input('+: ')
+    try:
+        parcela = float(parcela)
+    except ValueError:
+        return 0
+    return parcela
+
+# decorator
+def coro(func):
+    def start(*args, **kwargs):
+        g = func(*args, **kwargs)
+        next(g)
+        return g
+    return start
+
+@coro
+def somadora():
+    qt_parcelas = 0
+    total = 0
+    try:
+        while True:
+            parcela = yield
+            qt_parcelas += 1
+            total += parcela
+
+            print('parcelas: %d  total: %d' % (qt_parcelas, total))
+    finally:
+        print('parcelas: %d  total: %d  media: %d' % (qt_parcelas, total, total/qt_parcelas))
+
+def main():
+    coro = somadora()
+    while True:
+        parcela = ler_parcela()
+        if parcela:
+            coro.send(parcela)
+        else:
+            print('Fechando corotina...')
+            coro.close()
+            break
+
+if __name__=='__main__':
+    main()