From 920e07a6a7fe9c7982083900f08fbf4b23d2e66a Mon Sep 17 00:00:00 2001
From: zhang <zch921005@126.com>
Date: Sun, 23 Feb 2020 13:49:12 +0800
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---
 learning_python/__init__.py       |  0
 learning_python/late_binding.py   | 23 +++++++++++++++++++++++
 learning_python/mutable_params.py | 13 +++++++++++++
 learning_python/yield_demo.py     | 19 +++++++++++++++++++
 4 files changed, 55 insertions(+)
 create mode 100644 learning_python/__init__.py
 create mode 100644 learning_python/late_binding.py
 create mode 100644 learning_python/mutable_params.py
 create mode 100644 learning_python/yield_demo.py

diff --git a/learning_python/__init__.py b/learning_python/__init__.py
new file mode 100644
index 0000000..e69de29
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))
+
diff --git a/learning_python/mutable_params.py b/learning_python/mutable_params.py
new file mode 100644
index 0000000..6e2fdce
--- /dev/null
+++ b/learning_python/mutable_params.py
@@ -0,0 +1,13 @@
+
+def append_to(element, to=[]):
+    to.append(element)
+    return to
+
+
+if __name__ == '__main__':
+
+    my_list = append_to(12)
+    print(my_list, append_to)
+
+    my_other_list = append_to(42)
+    print(my_other_list, append_to)
diff --git a/learning_python/yield_demo.py b/learning_python/yield_demo.py
new file mode 100644
index 0000000..46480c3
--- /dev/null
+++ b/learning_python/yield_demo.py
@@ -0,0 +1,19 @@
+
+
+def generator():
+    for i in range(10):
+        yield i
+    print(i)
+
+
+def fun():
+    for i in range(10):
+        print(i)
+    print(i)
+
+
+if __name__ == '__main__':
+
+    # for i in generator():
+    #     print(i)
+    fun()
-- 
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