Closure and other staff

Author: diegoami

06-dp-1class-func/dp_func_4.py

@@ -5,14 +5,10 @@
 cart = [LineItem('banana', 4, .5),  # <2>
     LineItem('apple', 10, 1.5),
     LineItem('watermellon', 5, 5.0)]
-print(Order(joe, cart, fidelity_promo))
-print(Order(ann, cart, fidelity_promo))
+
 banana_cart = [LineItem('banana', 30, .5), LineItem('apple', 10, 1.5)]
-print(Order(joe, banana_cart, bulk_item_promo))  # <6>
 
 long_order = [LineItem(str(item_code), 1, 1.0) for item_code in range(10)]
-print(Order(joe, long_order, large_order_promo))
-print(Order(joe, cart, large_order_promo))
 
 print(Order(joe, long_order, best_promo))
 print(Order(joe, banana_cart, best_promo))

07-closure-deco/average_2.py

@@ -0,0 +1,18 @@
+
+
+def make_averager():
+    count = 0
+    sum = 0
+
+    def averager(new_value):
+        nonlocal count, sum
+        count += 1
+        sum += new_value
+        return sum/count
+
+    return averager
+
+avg = make_averager()
+print(avg(10))
+print(avg(11))
+print(avg(12))

07-closure-deco/average_driver.py

@@ -0,0 +1,10 @@
+from average import make_averager
+
+avg = make_averager()
+print(avg(10))
+print(avg(11))
+print(avg(12))
+print(avg.__code__.co_varnames)
+print(avg.__code__.co_freevars)
+print(avg.__closure__)  # doctest: +ELLIPSIS
+print(avg.__closure__[0].cell_contents)

07-closure-deco/clockdeco_2.py

@@ -0,0 +1,36 @@
+# clockdeco.py
+
+import time
+import functools
+
+def clock(func):
+    @functools.wraps(func)
+    def clocked(*args, **kwargs):
+        t0 = time.time()
+        result = func(*args, **kwargs)
+        elapsed = time.time() - t0
+        name = func.__name__
+        arg_lst = []
+        if args:
+            arg_lst.append(', '.join(repr(arg) for arg in args))
+        if kwargs:
+            pairs = ['%s=%r' % (k,w) for k, w in sorted(kwargs.items())]
+            arg_lst.append(', '.join(pairs))
+        arg_str = ', '.join(arg_lst)
+        print('[%0.8fs] %s(%s) -> %r ' % (elapsed, name, arg_str, result))
+        return result
+    return clocked
+
+@clock
+def snooze(seconds):
+    time.sleep(seconds)
+
+@clock
+def factorial(n):
+    return 1 if n < 2 else n*factorial(n-1)
+
+if __name__=='__main__':
+    print('*' * 40, 'Calling snooze(.123)')
+    snooze(.123)
+    print('*' * 40, 'Calling factorial(6)')
+    print('6! =', factorial(6))

07-closure-deco/clockdeco_cls.py

@@ -39,5 +39,10 @@ def snooze(seconds):
 
     for i in range(3):
         snooze(.123)
+    print(snooze(.1))  # doctest: +ELLIPSIS
+    print(clock('{name}: {elapsed}')(time.sleep)(.2) ) # doctest: +ELLIPSIS
+    print(clock('{name}({args}) dt={elapsed:0.3f}s')(time.sleep)(.2))
 
 # END CLOCKDECO_CLS
+##"""
+

07-closure-deco/fb_d1.py

@@ -0,0 +1,15 @@
+from strategy_best4 import Customer, LineItem, Order, best_promo
+
+joe = Customer('John Doe', 0)  # <1>
+ann = Customer('Ann Smith', 1100)
+cart = [LineItem('banana', 4, .5),  # <2>
+    LineItem('apple', 10, 1.5),
+    LineItem('watermellon', 5, 5.0)]
+
+banana_cart = [LineItem('banana', 30, .5), LineItem('apple', 10, 1.5)]
+
+long_order = [LineItem(str(item_code), 1, 1.0) for item_code in range(10)]
+
+print(Order(joe, long_order, best_promo))
+print(Order(joe, banana_cart, best_promo))
+print(Order(ann, cart, best_promo))

07-closure-deco/generic.py

@@ -49,4 +49,8 @@ def _(seq):
     return '<ul>\n<li>' + inner + '</li>\n</ul>'
 
 # END HTMLIZE
-
+print(htmlize({1, 2, 3}))
+print(htmlize(abs))
+print(htmlize('Heimlich & Co.\n- a game'))
+print(htmlize(42))  # <3>
+print(htmlize(['alpha', 66, {3, 2, 1}]))  # <4>

07-closure-deco/global_x_local.py

@@ -0,0 +1,33 @@
+def f1(a):
+    print(a)
+    print(b)
+#  f1(3)
+b = 6
+f1(3)
+
+
+def f2(a):
+    print(a)
+    print(b)
+    b = 9
+
+
+def f3(a):
+     global b
+     print(a)
+     print(b)
+     b = 9
+
+f3(6)
+
+def f4(b):
+    def f5(a):
+        nonlocal b
+        print(a)
+        print(b)
+        b = 7
+    return f5
+
+...
+f5b = f4(8)
+f5b(2)