How to install dependencies from a copied pipfile inside a virtual environment?

Question

The problem originates when I start by cloning a git project that uses pipenv, so it has a Pipfile + Pipfile.lock. I want to use a virtual environment with the project so I run pipenv shell. I now have a virtual environment created and I am inside the virtual environment. The project obviously has a lot of dependencies (listed in the Pipfile). I don't want to have to go through the list in the Pipfile one by one and install them using pipenv install <package_name>. Is there a pipenv/pip command that installs all the packages from a Pipfile I already have? Or maybe I need to set up the environment differently than running pipenv shell?

Solution 1

The proper answer to this question is that pipenv install or pipenv install --dev (if there are dev dependencies) should be ran. That will install all the dependencies in the Pipefile. Putting the dependencies into a requirements.txt and then using pip will work but is not really necessary. The whole point of using pipenv for most people is to avoid the need to manage a requirements.txt or to use pip.

EDIT: if the virtualenv is already activated, you can also use pipenv sync or pipenv sync --dev for the same effect.

Solution 2

Ideally, you are encouraged to have a requirements.txt file which contains all the packages required for installation via pip. You can create this file by doing:

pip freeze > requirements.txt

You can convert a Pipfile and Pipfile.lock into a requirements.txt. Take a look into this

pipenv lock -r

After that, you can install all your modules in your python virtual environment by doing the following:

pip install -r requirements.txt

Hopefully, I anwered your question.

Solution 3

use pipenv sync to install all packages specified in Pipfile.lock.

Solution 4

I had a similar issue. For me, I exited the virtualenv and ran

pipenv --three sync

and it worked.

From what I can understand the idea is to create a new virtual environment using python 3 in my case. If you're using python 2 the above command would be edited to read

pipenv --two

The sync command copies all dependencies from the Pipfile.lock over to the new virtualenv.

Solution 5

use pipenv sync in file Pipfiel

---

this code refrsh lib in file type .lock

pipenv sync

use this run virtualenv Pipfile

pipenv shell

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Comments

[Soumithri Chilakamarri]

@CalebSyring Also make sure to update the requirements.txt file by pip freeze file when you update/add new packages.

[Caleb Syring]

Okay, maybe this will reveal something wrong I'm doing, but pip freeze won't return anything. (I thought is was initially, but it was just some of the packages I had installed one by one before I asked this question) Have any ideas now that you know pip freeze doesn't return anything?

[Soumithri Chilakamarri]

Can you check if a requirements.txt file is created in your working directory?

[Caleb Syring]

There is no requirements.txt in the working directory now. I am ABLE to create one by running your code, if that's what you are asking.

[Luigi Lopez]

Thanks for the link to the conversion

[Kevin]

Why did you run this? What does it do? Can you provide an explanation?

[miriad]

I've updated the answer to hopefully provide more detail

[ChumbiChubaGo]

Hi I know this is old, but I have a pipenv virtual environment working well on one computer. I want to recreate that virual environment on another computer. So how do I go about doing this? Your answer is lacking a lot of detail. Previously I would just have a requirements.txt and just copy it over to the new virtual environment I want to setup on another computer. So which file do I copy over now? Do I copy over the Pipfile and Pipfile.lock ?

[etnguyen03]

@ChumbiChubaGo You should be able to copy the Pipfile and Pipfile.lock, and pipenv install within the directory on the other computer. In the future, though, you should probably start a new question instead of bumping an old one.

[wisenickel]

pipenv sync worked best for me