“没有名为 sqlalchemy 的模块"刚刚从 IPython 提示符安装后

问题描述

我无法导入 sqlalchemy.我搜索并找到了一些解决方案，例如安装flask或flask_sqlalchemy等.这些都没有帮助.

我错过了什么?

解决方案

有时，您需要重新启动 ipython 才能找到新安装的模块.

我相信这适用于添加到 sys.path 的模块.

根据 我可以压缩所有 python 标准库并且 python 仍然能够导入它吗? ，site.main() 应该也可以.>

除其他外，它会扫描 site-packages 目录中的 .pth 文件并将其内容添加到 sys.path.由于它的逻辑在添加之前检查重复项，因此在重复调用时它不应该使 sys.path 混乱.

I am unable to import sqlalchemy. I searched and found few solutions like installing flask or flask_sqlalchemy etc. None of these helped.

What am I missing?

解决方案

Sometimes, you need to restart ipython for it to find freshly-installed modules.

I believe this holds for modules that add to sys.path.

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As per Can I zip all the python standard libs and the python still able to import it? , site.main() should work, too.

It, among other things, scans site-packages directories for .pth files and adds their contents to sys.path. Thanks to the fact that its logic checks for duplicates before adding, it shouldn't clutter sys.path when invoked repeatedly.

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