可变参数，延迟板顶，yield 关键字与python 函数式闭包编程

1 files changed, 23 insertions, 0 deletions

diff --git a/learning_python/late_binding.py b/learning_python/late_binding.py
new file mode 100644
index 0000000..775a6d7
--- /dev/null
+++ b/learning_python/late_binding.py
@@ -0,0 +1,23 @@
+
+def create_multipliers():
+    return [lambda x : i * x for i in range(5)]
+
+
+def create_multipliers_explicit():
+    return [lambda x, i=i: i * x for i in range(5)]
+
+
+def create_multipliers_yield():
+    for i in range(5):
+        yield lambda x: i*x
+
+
+for multiplier in create_multipliers():
+    print(multiplier.__closure__[0].cell_contents, multiplier(2))
+
+for multiplier in create_multipliers_explicit():
+    print(multiplier.__closure__, multiplier(2))
+
+for multiplier in create_multipliers_yield():
+    print(multiplier.__closure__[0].cell_contents, multiplier(2))
+