No module named 'em'

No module named 'em'这个错误通常表示你的Python环境缺少名为'em'的模块。根据引用内容，这个错误可能是在使用ROS自定义消息时出现的。根据引用的解决方案，你可以通过执行命令`python -m pip install empy`来安装em模块。如果在安装过程中出现权限问题，你可以使用`python -m pip install empy --user`命令。另外，根据引用，你也可以尝试使用命令`sudo apt-get install python-empy`进行安装。希望这些解决方案对你有帮助。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
- *1* [浅谈pycharm下找不到sqlalchemy的问题](https://download.csdn.net/download/weixin_38723513/13768586)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_1"}}] [.reference_item style="max-width: 33.333333333333336%"]
- *2* [（解决方案）ros中自定义消息 报错 ImportError: No module named em](https://blog.csdn.net/qq_41204464/article/details/102919570)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_1"}}] [.reference_item style="max-width: 33.333333333333336%"]
- *3* [ModuleNotFoundError: No module named 'em'解决办法](https://blog.csdn.net/qq_42138662/article/details/105678278)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_1"}}] [.reference_item style="max-width: 33.333333333333336%"]
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