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21 lines
553 B
Markdown
21 lines
553 B
Markdown
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## **uerrno** – 系统错误码模块
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`uerrno` 模块提供了标准的 errno 系统符号，每个符号都有对应的整数值。
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### 示例
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```python
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try:
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uos.mkdir("my_dir")
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except OSError as exc:
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if exc.args[0] == uerrno.EEXIST:
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print("Directory already exists")
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uerrno.errorcode
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Dictionary mapping numeric error codes to strings with symbolic error code (see above):
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>>> print(uerrno.errorcode[uerrno.EEXIST])
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EEXIST
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```
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更多内容可参考 [uerrno](http://docs.micropython.org/en/latest/pyboard/library/uerrno.html) 。
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