为什么`pip freeze`会导致一个空文件？

Question

I'm following the tutorial to deploy Django applications on Heroku.

In the 5th line of the code, it says pip freeze > requirements.txt but when I run it (from the venv ), the requirements.txt file is empty. It produced 6-7 dependencies with the same code before.

How can I fix this?

Answer 1

这可能意味着依赖项已安装在全局环境中，切换到venv，然后使用pip install <dependency>手动pip install <dependency> ，然后运行pip freeze Frozen应该输出依赖项

Answer 2

This answer is for posterity

• This could be because of pip being deprecated.So upgrade pip by using

python -m pip install -–upgrade pip

Then run pip freeze > requirements.txt as usually.This should do the job.