如题，之前生成了一份requirements.txt文件，现在安装了新扩展，需要更新一下requirements.txt文件，我在cmd命令进入virtual环境后直接用 pip freeze > requirements.txt 回车，然后看requirements.txt 文件还是没有变化。想删除文件然后再生成，但是这样太麻烦pip应该有覆盖选项的。
天蓬老师2017-04-17 17:40:50
It’s not that there has been no change, but maybe you got the directory wrong. If that doesn’t work, just bring the absolute path to txt
