twisted 18.7.0 requires PyHamcrest>=1.9.0, which is not installed.

根据引用\[1\]和引用\[2\]的内容，可以得出结论：在升级pip版本时，可能出现了依赖冲突的问题。具体来说，twisted 18.7.0要求安装PyHamcrest的版本至少为1.9.0，但是当前系统中没有安装这个版本的PyHamcrest。为了解决这个问题，可以通过命令行输入"pip install PyHamcrest"来安装所需的PyHamcrest版本。安装成功后，可以使用"pip show PyHamcrest"来确认PyHamcrest已经成功安装。这样就可以满足twisted 18.7.0对PyHamcrest的版本要求了。
#### 引用[.reference_title]
- *1* [twisted 18.7.0 requires PyHamcrest＞=1.9.0, which is not installed.](https://blog.csdn.net/bulletstart/article/details/131054911)[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^v91^insertT0,239^v3^insert_chatgpt"}} ] [.reference_item]
- *2* [简单解决twisted 18.7.0 requires PyHamcrest＞=1.9.0, which is not installed.问题](https://blog.csdn.net/qq_40089560/article/details/114494464)[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^v91^insertT0,239^v3^insert_chatgpt"}} ] [.reference_item]
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