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由 araigumaG 提交于
The textbook written for the course on python is freely licensed ([CC-BY-NC-ND](https://creativecommons.org/licenses/by-nc-nd/4.0/)), so it seems worth being added.
5eba6e28
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The textbook written for the course on python is freely licensed ([CC-BY-NC-ND](https://creativecommons.org/licenses/by-nc-nd/4.0/)), so it seems worth being added.