Add python decorators seminar

07_python/bench.py

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+

07_python/closure.py

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+def adder():
+    n = 0
+
+    def add():
+        nonlocal n
+        n += 1
+        return n
+
+    return add

07_python/debugger.py

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+def debug_call(f):
+    def inner(*args, **kwargs):
+        print(f, args, kwargs)
+        return f(*args, **kwargs)
+
+    return inner
+
+
+# @debug_call
+def foo(a, b):
+    return a + b
+
+
+foo = debug_call(foo)

07_python/name_test.py

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+# first attempt
+def deco_first(f):
+    def inner(*args, **kwargs):
+        return f(*args, **kwargs)
+
+    inner.__name__ = f.__name__
+    inner.__doc__ = f.__doc__
+    inner.__qualname__ = f.__qualname__
+
+    return inner
+
+
+# second attempt
+from functools import update_wrapper
+
+
+def deco_second(f):
+    def inner(*args, **kwargs):
+        return f(*args, **kwargs)
+
+    update_wrapper(inner, f)
+    return inner
+
+
+# third attempt
+
+
+def my_wraps(original):
+    def deco(wrapper):
+        update_wrapper(wrapper, original)
+        return wrapper
+
+    return deco
+
+
+from functools import partial
+
+
+def partial_wraps(original):
+    return partial(update_wrapper, wrapped=original)
+
+
+# def deco_third(f):
+#     def inner(*args, **kwargs):
+#         return f(*args, **kwargs)
+#
+#     deco = my_wraps(f)
+#     inner = deco(inner)
+#     return inner
+
+
+def deco_third(f):
+    @partial_wraps(f)
+    def inner(*args, **kwargs):
+        return f(*args, **kwargs)
+
+    return inner
+
+
+# third attempt
+from functools import wraps
+
+
+def deco_fourth(f):
+    @wraps(f)
+    def inner(*args, **kwargs):
+        return f(*args, **kwargs)
+
+    return inner
+
+
+@deco_third
+def foo(a, b, c):
+    """
+    Foo function docstring
+    """
+    return a + b + c

07_python/partial.py

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+from functools import partial
+
+
+def foo(a, b, new_name):
+    return new_name * (b + a)
+
+
+bar = partial(foo, c=500)

07_python/retry.py

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+def adder():
+    n = 0
+
+    def add():
+        nonlocal n
+        n += 1
+        return n
+
+    return add
+
+
+def retry(n: int = 5):
+    def deco(f):
+        def inner(*args, **kwargs):
+            for _ in range(n):
+                f(*args, **kwargs)
+
+        return inner
+
+    return deco
+
+
+# @retry(5)
+def foo():
+    print("Hello world!")
+
+
+foo = (retry(5))(foo)
+
+
+@retry(15)
+def bar():
+    print("Bar")