在安装cs231n课程作业环境时遇到pip install -r requirements.txt的报错。主要问题包括：1) site==0.0.1包找不到，解决方案是删除requirements.txt中的该行；2) gnureadline库构建失败，可能缺少依赖；3) KNN代码运行时报'No module named _tkinter'错误，需安装Tkinter相关模块。
pip install -r requirements.txt出现的报错：
1.原来的42行：site==0.0.1 找不到这个包
报错内容：
Could not find a version that satisfies the requirement site==0.0.1 (from -r requirements.txt (line 42)) (from versions: )
No matching distribution found for site==0.0.1 (from -r requirements.txt (line 42))直接在requirements.txt中删除这一行site==0.0.1
site==0.0.1的问题
2. Failed building wheel for gnureadline
缺少如下依赖包：
sudo apt-get install libncurses5-devFailed building wheel for gnureadline
3. knn第一个cell报错”No module named _tkinter”
sudo apt install python3-tk
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