How to create a requirements.txt?

Question

I'm wondering how I can create a suitable requirements.txt for my Python 3 application?

score 94 · Accepted Answer · answered Apr 29 '15 at 08:43

94

type following line in your command prompt

pip freeze > requirements.txt

answered Apr 29 '15 at 08:43

Pawan

13

This answer will work *assuming you are using virtualenv*. – Eloims Apr 29 '15 at 08:44
27

It will work even if not using a `virtualenv`, but it will list all packages installed on the system with pip – Paco Apr 29 '15 at 08:46
1

Even if it works, it is too clumsy and blotted. Suppose you have 100 libraries you need in a project. And with 3 dependencies each. Will you be able to manage your requirements.txt? – Kifsif May 16 '21 at 10:14

score 45 · Answer 2 · answered Dec 15 '17 at 02:41

45

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.

answered Dec 15 '17 at 02:41

siddhantsomani

Thanks! This also works great (it doesn't add all the libraries in a machine, but only those used in the folder), even if you don't have a virtual environment! – Yauheni Leaniuk Mar 31 '21 at 10:55
1

This doesn't catch all possible cascading dependencies for my Cython lib, but it's the starting point I needed. Thanks. – Phlucious Aug 18 '21 at 23:12

0xMH · Answer 3 · 2017-09-18T23:19:22.707

5

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

edited Sep 18 '17 at 23:19

answered Jul 26 '17 at 13:23

0xMH

To be clear you simply install pigar and run `pigar` in the local directory of the python file you want the requirements.txt for – jspinella May 18 '22 at 17:53

3 Answers3