从需求文件中删除未使用的包 [英] Delete unused packages from requirements file

问题描述

有没有什么简单的方法可以从需求文件中删除不再使用的包?

Is there any easy way to delete no-more-using packages from requirements file?

我为此任务编写了一个 bash 脚本，但是它没有按我预期的那样工作.因为，有些包没有跟在它们的 PyPI 项目名称之后使用.例如;

I wrote a bash script for this task but, it doesn't work as I expected. Because, some packages are not used following their PyPI project names. For example;

dj-database-url

包用作

dj_database_url

我的项目在它自己的需求文件中有很多包，所以，一个一个地搜索它们太混乱、容易出错并且花费太多时间.正如我所搜索的，IDE 还没有这个属性.

My project has many packages in its own requirements file, so, searching them one-by-one is too messy, error-prone and takes too much time. As I searched, IDEs don't have this property, yet.

推荐答案

您可以在 PyCharm.

1. 删除requirements.txt 的内容，但保留空文件.
2. 加载您的项目，
3. PyCharm 转到 Code ->检查代码....
4. 在对话框中选择Whole project选项并点击OK.在检查结果面板中，找到 Python 下的 Package requirements 部分(注意只有当有任何 requirements.txt 或 时才会显示此部分>setup.py 文件).该部分将包含以下消息之一:

1. Delete the contents of your requirements.txt but keep the empty file.
2. Load your project in,
3. PyCharm go to Code -> Inspect code....
4. Choose Whole project option in dialog and click OK. In inspection results panel locate Package requirements section under Python (note that this section will be showed only if there is any requirements.txt or setup.py file). The section will contain one of the following messages:

• 包装要求 ''如果requirements.txt 中列出了任何包，但没有在任何 .py 文件中使用，则不满足.
• 包 ''如果在 .py 文件中使用了任何包，但未在 requirements.txt 中列出，则不会在项目需求 中列出.
• Package requirement '<package>' is not satisfied if there is any package that is listed in requirements.txt but not used in any .py file.
• Package '<package>' is not listed in project requirements if there is any package that is used in .py files, but not listed in requirements.txt.

您对第二次检查感兴趣.您可以通过右键单击 Package requirements 部分并选择 Apply Fix 'Add requirements '' 将所有使用的包添加到 requirements.txt到requirements.txt'.请注意，它只会显示一个包名称，但如果调用部分，它实际上会将所有使用的包添加到 requirements.txt.

You are interested in the second inspection. You can add all used packages to requirements.txt by right clicking the Package requirements section and selecting Apply Fix 'Add requirements '<package>' to requirements.txt'. Note that it will show only one package name, but it will actually add all used packages to requirements.txt if called for section.

如果需要，可以一一添加，只需右键单击某个包对应的检查并选择Apply Fix 'Add requirements''到requirements.txt'，重复这种检查.

If you want, you can add them one by one, just right click the inspection corresponding to certain package and choose Apply Fix 'Add requirements '<package>' to requirements.txt', repeat for each inspection of this kind.

之后，您可以创建干净的虚拟环境并从新的 requirements.txt 安装包.

After that you can create clean virtual environment and install packages from new requirements.txt.

另请注意，PyCharm 具有导入优化功能，请参阅优化导入....在上面列出的任何其他步骤之前使用此功能会很有用.

Also note that PyCharm has import optimisation feature, see Optimize imports.... It can be useful to use this feature before any other steps listed above.

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