vault backup: 2022-09-26 18:39:43

Affected files:
.obsidian/workspace
03. 資料收集/HTTP Server/Nginx.md
03. 資料收集/Hobby/RC.md
03. 資料收集/Hobby/模型/Traxxas Sledge.md
03. 資料收集/Hobby/模型/舊化作例.md
03. 資料收集/Hobby/軍武/虎式.md
03. 資料收集/Programming/COM/20210726 - COM Interface.md
03. 資料收集/Programming/DB/MySQL.md
03. 資料收集/Programming/DB/sqlite.md
03. 資料收集/Programming/Design Pattern.md
03. 資料收集/Programming/FFMPEG/00. Introduction.md
03. 資料收集/Programming/FFMPEG/01. Setup.md
03. 資料收集/Programming/FFMpeg.md
03. 資料收集/Programming/Flask.md
03. 資料收集/Programming/Media Foundation/20210604 - Windows media foundation.md
03. 資料收集/Programming/OpenCV.md
03. 資料收集/Programming/OpenGL.md
03. 資料收集/Programming/Python/argparse.ArgumentParser.md
03. 資料收集/Programming/Python/decorator.md
03. 資料收集/Programming/Python/logging.md
03. 資料收集/Programming/Python/opencv.md
03. 資料收集/Programming/Python/subprocess.md
03. 資料收集/Programming/Python/threading.md
03. 資料收集/Programming/Python/tkinter.md
03. 資料收集/Programming/Python/檢測工具.md
03. 資料收集/Programming/QT/Dropdown button.md
03. 資料收集/Programming/QT/QVariant.md
03. 資料收集/Programming/QT/Qt.md
03. 資料收集/Programming/Qt.md
03. 資料收集/Programming/UML.md
03. 資料收集/Programming/演算法.md
03. 資料收集/架站/03. Trojan.md
03. 資料收集/架站/Gitea.md
03. 資料收集/架站/HTTP Server/Apache.md
03. 資料收集/架站/HTTP Server/Nginx/Reverse Proxy(Layer4).md
03. 資料收集/架站/Pelican blog.md
03. 資料收集/架站/Proxmox VE.md
03. 資料收集/架站/SWAG Reverse proxy.md
03. 資料收集/架站/Storj.md
03. 資料收集/架站/Trojan.md
03. 資料收集/科技/802.11.md
03. 資料收集/科技/HDR Sensor.md
03. 資料收集/科技/量子電腦.md
03. 資料收集/科技/鋰電池.md
03. 資料收集/軟體工具/IPFS.md
03. 資料收集/軟體工具/MkDocs.md
03. 資料收集/軟體工具/Obsidian.md
03. 資料收集/軟體工具/docker.md
03. 資料收集/軟體工具/git/apply.md
03. 資料收集/軟體工具/git/submodule.md

03. 資料收集/Programming/Python/decorator.md

@@ -0,0 +1,48 @@
+## 在decorator內取得function的default argument與class member
+```python
+import sys
+import inspect
+from functools import wraps
+
+
+def exampleDecorator(func):
+    @wraps(func)
+    def wrapper(*args, **kwargs):
+        print(f"Decorator: call by {func.__name__}")
+        def get_default_args(func):
+            signature = inspect.signature(func)
+            return {
+                k: v.default for k, v in signature.parameters.items() if v.default is not inspect.Parameter.empty
+            }
+
+        ## Get default
+        defaultKwargs = get_default_args(func)
+        defaultKwargs.update(kwargs)
+        print(f"Decorator: args = {args}, kwargs = {kwargs}, defaultKwargs = {defaultKwargs}")
+
+        objectInstance = args[0]
+        if hasattr(objectInstance, 'defaultArg1'):
+            print(f'objectInstance has defaultArg1, a.defaultArg1({type(objectInstance.defaultArg1)}) = {objectInstance.defaultArg1}')
+            if objectInstance.defaultArg1:
+                ## Do something here
+                print("Decorator: some message...")
+        else:
+            print('objectInstance does not have defaultArg1')
+
+        return func(*args, **kwargs)
+    return wrapper
+
+
+class ExampleClass():
+    def __init__(self, defaultArg1=True, defaultArg2="SomeString"):
+        self.defaultArg1 = defaultArg1
+        self.defaultArg2 = defaultArg2
+        print(f'self.defaultArg1 = {self.defaultArg1}, self.defaultArg2 = {self.defaultArg2}')
+
+    @exampleDecorator
+    def run(self, arg1=1, arg2=2):
+        print(f"ExampleClass.run(), arg1 = {arg1}, arg2 = {arg2}")
+
+example = ExampleClass()
+example.run()
+```