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                # uerrno — 系統錯誤代碼 該模塊實現了相應CPython模塊的子集,如下所述。有關更多信息,請參閱原始CPython文檔:[errno](https://docs.python.org/3.5/library/errno.html#module-errno)。 該模塊描述了`OSError`錯誤的錯誤標識。特定的代碼庫存取決于`Micropython 的移植`, 錯誤會在特定的會出現錯誤的函數進行說明。 ## 1\. 常量 ### 1.1. EEXIST, EAGAIN, 等 基于 ANSI C / POSIX 標準的錯誤代碼。所有錯誤代碼均以 “E” 開頭。如上所述,代碼庫存取決于 MicroPython 的移植。錯誤通常可以作為`exc.args [0]`訪問,其中`exc`是`OSError`的一個實例。用法示例: ~~~ try: uos.mkdir("my_dir") except OSError as exc: if exc.args[0] == uerrno.EEXIST: print("Directory already exists") ~~~ ### 1.2. 字典將數字錯誤代碼映射到帶有符號錯誤代碼的字符串(參見上文): ``` uerrno.errorcode ``` ~~~ >>> print(uerrno.errorcode[uerrno.EEXIST]) EEXIST ~~~
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