This question already has an answer here:
- Automatically create requirements.txt 5 answers
I'm wondering how I can create a suitable requirements.txt for my Python 3 application?
type following line in your command prompt
pip freeze > requirements.txt
There's a module called pipreqs which is designed for creating the requirements file.
pip install pipreqs
pipreqs /GitHub/FolderName #Insert path to file
Add the location to the folder where the python files reside. Pipreqs will create a requirements.txt file in the folder.
if you aren't in virtualenv and don't feel like putting all your installed packages in the requirements file like the accepted answer. just use pigar
来源：https://stackoverflow.com/questions/29938554/how-to-create-a-requirements-txt