Support for retrieving environment variables with escaped characters from configuration files. 支持在配置文件中，获取带转义字符的环境变量

[OpenMMLab-Assistant-004]

Support for retrieving environment variables with escaped characters from configuration files.

支持在配置文件中，获取带转义字符的环境变量

Support for retrieving environment variables with escaped characters from configuration files. See more details in [open-mmlab/mmengine#1161](https://github.com/open-mmlab/mmengine/issues/1161](https://github.com/open-mmlab/mmengine/issues/1161))

支持在配置文件中，获取带转义字符的环境变量。

详见 [open-mmlab/mmengine#1161](https://github.com/open-mmlab/mmengine/issues/1161](https://github.com/open-mmlab/mmengine/issues/1161))

Task Information

Repository：MMEngine

Difficulty：Medium

Points：30

Estimated Time Consumption：14 days

Task Status

Claimant's Github ID：None

Claim Time：None

PR Link：None

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