Add note

content/computer_sci/coding_knowledge/coding_lang_MOC.md

@@ -4,7 +4,7 @@ tags:
   - basic
   - coding-language
   - MOC
-date: 2024-03-13
+date: 2024-03-18
 ---
 
 # Python
@@ -15,6 +15,8 @@ date: 2024-03-13
 * [Assert in Python](computer_sci/coding_knowledge/python/assert_in_python.md)
 * [Package in Python](computer_sci/coding_knowledge/python/package_in_python.md)
 * [Python Namespace Pollution](computer_sci/coding_knowledge/python/python_namespace_pollution.md)
+* [About Private and Public, Python as example](computer_sci/coding_knowledge/python/about_private_and_public.md)
+* [Python Import for different level folders](computer_sci/coding_knowledge/python/python_import_different_folder.md)
 # HTML
 
 * [HTML Double Curly Braces](computer_sci/coding_knowledge/web/html_double_curly_braces.md)

content/computer_sci/coding_knowledge/python/about_private_and_public.md

@@ -0,0 +1,17 @@
+---
+title: About Private and Public, Python as Example
+tags:
+  - python
+  - coding-language
+date: 2024-03-18
+---
+
+# A good answer
+
+In Python, "privacy" depends on "consenting adults'" levels of agreement - you can't _force_ it. A single leading underscore means you're not **supposed** to access it "from the outside" -- **two** leading underscores (w/o trailing underscores) carry the message even more forcefully... but, in the end, it still depends on social convention and consensus: Python's introspection is forceful enough that you can't **handcuff** every other programmer in the world to respect your wishes.
+
+((Btw, though it's a closely held secret, much the same holds for C++: with most compilers, a simple `#define private public` line before `#include`ing your `.h` file is all it takes for wily coders to make hash of your "privacy"...!-))
+
+# Reference
+
+* https://stackoverflow.com/questions/1547145/defining-private-module-functions-in-python

content/computer_sci/coding_knowledge/python/python_import_different_folder.md

@@ -0,0 +1,59 @@
+---
+title: Python import 异级目录
+tags:
+  - python
+date: 2024-03-18
+---
+
+# Learn by Example
+
+## 主程序和模块程序在同一目录下
+
+```python
+'''
+-- src
+	|-- mod1.py
+	|-- main.py
+'''
+
+import mod1
+from mod1 import *
+```
+
+## 模块程序在父辈目录
+
+```python
+ '''
+ -- src
+	|-- mod1
+		 |-- __init__.py
+		 |-- mod1.py
+	|-- main.py
+ '''
+
+import mod1.mod1
+from mod1 import mod1
+```
+
+
+## 其他目录下的模块
+
+```python
+'''
+-- src
+	|-- mod1
+		|-- __init__.py
+		|-- mod1.py
+	|-- sub
+		|-- main.py
+'''
+
+import sys
+sys.path.append("..")
+import mod1.mod1
+```
+
+
+# Reference
+
+* https://blog.csdn.net/vitaminc4/article/details/78134508