Looking in indexes: https://pypi.org/simple, https://www.piwheels.org/simple Requirement already satisfied: pyusb in ./.local/lib/python3.9/site-packages (1.2.1)

根据你提供的信息，看起来你已经成功安装了'pyusb'模块。这意味着在你的Python环境中已经存在该模块。

如果你仍然遇到'ModuleNotFoundError: No module named 'usb''错误，可能是因为你的代码中使用了错误的模块名。请确保你的代码中使用的模块名是正确的，即'usb'或'pyusb'。

如果问题仍然存在，请提供更多关于你的代码和具体的错误消息的信息，以便我们能够更好地帮助你解决问题。

相关问题

Defaulting to user installation because normal site-packages is not writeable Looking in indexes: https://pypi.tuna.tsinghua.edu.cn/simple Requirement already satisfied: pillow in /usr/lib/python3/dist-packages (5.1.0)

这不是一个问题，而是一段Python代码。它的作用是检查系统是否有写入权限来安装Python包，如果没有就将包安装在用户目录下。接着这段代码查找了一个国内的源来获取需要安装的包，然后发现已经安装了pillow包（版本为5.1.0）。

Looking in indexes: https://pypi.tuna.tsinghua.edu.cn/simple

This message usually appears when you are trying to install a Python package using pip and it is searching for the package in the indexes specified in your pip configuration. In this case, it is searching for the package in the Tsinghua University mirror.

If you have configured pip to use this mirror, it will try to download the package from there. If the package is found, it will be installed. Otherwise, pip will look for the package in other indexes specified in your configuration.

If you don't want to use the Tsinghua mirror, you can remove it from your configuration or specify a different mirror to use. To do this, you can edit your pip configuration file or use the `--index-url` option with pip.