Pip freeze for only 项目需求

Question

When I run pip freeze > requirements.txt it seems to include all installed packages. This appears to be the documented behavior.

I have, however, done something wrong as this now includes things like Django in projects that have no business with Django.

How do I get requirements for just this project? or in the future how do I install a package with pip to be used for this project. I think I missed something about a virtualenv .

Answer 1

pipreqs can save the day for a specific project. Just

pip install pipreqs
#then
pipreqs path/to/project

Github Page

Answer 2

我已经尝试了pipreqs和pigar并发现pigar更好，因为它还能生成关于它在哪里使用的信息，它还有更多的选择。

Answer 3

I use this command

EDIT: Thanks Addisson Klinke for suggestion

pip freeze -r requirements.txt | grep -B100 "pip freeze" | grep -v "pip freeze"

pip freeze -r requirements.txt | sed '/freeze/,$ d'

When I ran pip freeze -r requirements.txt the output is something like

APScheduler==3.2.0
Eve==0.6.4
Eve-Elastic==0.3.8
## The following requirements were added by pip freeze:
arrow==0.8.0
Cerberus==0.9.2

I have a requirements file like this

APScheduler
Eve
Eve-Elastic

So I get this output and sed to remove the dependencies that I don`t want.

First output this to a file

pip freeze -q -r requirements.txt | sed '/freeze/,$ d' > requirements-froze.txt 

That will output just the libs with version

APScheduler==3.2.0
Eve==0.6.4
Eve-Elastic==0.3.8

Then replace requirements file

mv requirements-froze.txt requirements.txt 

Answer 4

I still suggest using the official pip freeze > requirements.txt ( documentation ) compared to the two alternative features using pigar and pipreqs mentioned in the other answers because pip freeze lists the effective package names .

Incomplete comparison among the three as per February 2022

Criteria \ Tool	pip freeze > requirements.txt	pigar	pipreqs
Name mismatch (1)	Package my-package==1.0.0	Module my_package == 1.0.0	Module my_package==1.0.0
Module overloading (2)	All packages my-package1==1.0.0 , my-package2==2.0.0	None	Top-level module (version shows 0.0.0) my==0.0.0
Showing only directly used packages	No	Yes	Yes
Minimal contents	Yes	No	Yes

(1) There can be a mismatch between module and package name such as my-package (package name) vs my_package (module name).

(2) There can be several packages using the same top level folder such as my-package1 and my-package2 (package names) which are installed under my/package1 and my/package2 , which are imported by Python's command import my.package1 and import my.package2 . Note that pipreqs notes version 0.0.0 for the not existing package my .

I know these are very particular cases but I hope giving people this overview can help understanding limitations and avoid possible mistakes.

Answer 5

Here is a simplified version based on the previous comment: https://stackoverflow.com/a/40026169/4052041

mv requirements.txt requirements.txt.bak
pip freeze -q -r requirements.txt.bak | awk '/.*pip freeze.*/  {exit} {print}' > requirements.txt

Answer 6

With your virtualenv activated, do python -E -m pip freeze . The -E flag means, according to python --help , ignore PYTHON* environment variables (such as PYTHONPATH) , so pip it's not going to access to global site-packages .

Answer 7

如果您使用的是 linux，那么请使用sed

pip freeze | sed 's/==.*$/''/' > requirements.txt

Answer 8

I had the same issue with pip freeze . In my case the problem was that I ran pip freeze without activating my projects virtual environment. I activated the virtual environment and pip freeze > requirements.txt worked fine.

So do make sure you activate your projects virtual environment by running <virtualenv folder name>\\Scipts\\activate on Windows or source <virtualenv folder name>\\bin\\activate on Linux.

If the virtualenv has global access you should run pip freeze with the -l or --local option, pip freeze -l which according to thepip freeze docs

If in a virtualenv that has global access, do not output globally-installed packages.

Answer 9

I just had the same issue, here's what I've found to solve the problem.

First create the venv in the directory of your project, then activate it.

For Linux/MacOS : python3 -m venv ./venv source myvenv/bin/activate

For Windows : python3 -m venv .\\venv env\\Scripts\\activate.bat

Now pip freeze > requirements.txt should only takes the library used in the project.

NB: If you have already begin your project you will have to reinstall all the library to have them in pip freeze.

Answer 10

pip install pipreqs, 
pipreqs>requirements.txt

That works easily

Answer 11

I do came across same situation. After activating the virtual enviroment and doing

pip3 freeze > requirements.txt

still its collect all package install on my WSL ubuntu 22.04

After install "pipreqs" and typing pipreqs>requirments.txt My Wsl got stuck.

The best solution is pip3 freeze -l > requirments.txt its only collected my local package used for my development.

Answer 12

There is a package that works for me in windows and Lunix Pipdeptree After the installation you can use Pipdeptree to generate requirements.txt file with just top-level packages.

Windows:

pipdeptree -f --warn silence | findstr  /r  "^[a-zA-Z0-9\-]" > requirements.txt

Lunix:

pipdeptree -f --warn silence | grep -E '^[a-zA-Z0-9\-]+' > requirements.txt