timmy gist felülvizsgálása 9 months ago. Revízióhoz ugrás
3 files changed, 45 insertions
custom_context_example.py(fájl létrehozva)
| @@ -0,0 +1,13 @@ | |||
| 1 | + | from contextlib import contextmanager | |
| 2 | + | ||
| 3 | + | @contextmanager | |
| 4 | + | def custom_context(name): | |
| 5 | + | print(f"進入上下文: {name}") | |
| 6 | + | try: | |
| 7 | + | yield name # 提供資源 | |
| 8 | + | finally: | |
| 9 | + | print(f"退出上下文: {name}") | |
| 10 | + | ||
| 11 | + | # 使用 with 語法 | |
| 12 | + | with custom_context("示範") as ctx: | |
| 13 | + | print(f"內部執行: {ctx}") | |
custom_file_context_manager.py(fájl létrehozva)
| @@ -0,0 +1,14 @@ | |||
| 1 | + | from contextlib import contextmanager | |
| 2 | + | ||
| 3 | + | @contextmanager | |
| 4 | + | def open_file(file_path, mode): | |
| 5 | + | file = open(file_path, mode) | |
| 6 | + | try: | |
| 7 | + | yield file # 提供檔案資源 | |
| 8 | + | finally: | |
| 9 | + | file.close() # 確保檔案關閉 | |
| 10 | + | print(f"檔案 {file_path} 已關閉") | |
| 11 | + | ||
| 12 | + | # 使用自訂上下文管理器 | |
| 13 | + | with open_file("example.txt", "w") as f: | |
| 14 | + | f.write("這是一個測試檔案\n") | |
thread_lock_context_manager.py(fájl létrehozva)
| @@ -0,0 +1,18 @@ | |||
| 1 | + | from contextlib import contextmanager | |
| 2 | + | import threading | |
| 3 | + | ||
| 4 | + | lock = threading.Lock() | |
| 5 | + | ||
| 6 | + | @contextmanager | |
| 7 | + | def locked_resource(): | |
| 8 | + | print("獲取鎖") | |
| 9 | + | lock.acquire() | |
| 10 | + | try: | |
| 11 | + | yield | |
| 12 | + | finally: | |
| 13 | + | lock.release() | |
| 14 | + | print("釋放鎖") | |
| 15 | + | ||
| 16 | + | # 測試鎖機制 | |
| 17 | + | with locked_resource(): | |
| 18 | + | print("執行臨界區程式") | |
Újabb
Régebbi