How to Install Packages Using Pip According to the Requirements.Txt File from a Local Directory

How can I install packages using pip according to the requirements.txt file from a local directory?

This works for me:

$ pip install -r requirements.txt --no-index --find-links file:///tmp/packages

--no-index - Ignore package index (only looking at --find-links URLs instead).

-f, --find-links <URL> - If a URL or path to an HTML file, then parse for links to archives.

If a local path or file:// URL that's a directory, then look for archives in the directory listing.

Installing Python packages from local file system folder to virtualenv with pip

I am pretty sure that what you are looking for is called --find-links option.

You can do

pip install mypackage --no-index --find-links file:///srv/pkg/mypackage

How to use requirements.txt to install all dependencies in a python project

If you are using Linux OS:

1. Remove matplotlib==1.3.1 from requirements.txt
2. Try to install with sudo apt-get install python-matplotlib
3. Run pip install -r requirements.txt (Python 2), or pip3 install -r requirements.txt (Python 3)
4. pip freeze > requirements.txt

If you are using Windows OS:

1. python -m pip install -U pip setuptools
2. python -m pip install matplotlib

pip fails to install all packages from requirements.txt

Thanks to @phd, I found that I should set install_requires in setup.py. After that, this issue was fixed.

Install a Python package into a different directory using pip?

Use:

pip install --install-option="--prefix=$PREFIX_PATH" package_name

You might also want to use --ignore-installed to force all dependencies to be reinstalled using this new prefix. You can use --install-option to multiple times to add any of the options you can use with python setup.py install (--prefix is probably what you want, but there are a bunch more options you could use).

Install Packages in Custom Feed Using a .txt File

The only way I got this to work is by including the --extra-index-url argument at the top of my requirements.txt file.

If I am to borrow from the answer @sachin has posted, it needed to be like this,

--extra-index-url https://:@pkgs.dev.azure.com///_packaging//pypi/simple/
stack==2.3.1
overflow==0.12.2
fun==0.63.0

How to export installed packages(using pip in a conda environment) in to requirements.txt?

I think it will works

pip3 freeze > C:\PATH\TO\FOLDER\requirements.txt

It may be needed to run terminal as administrator - if you cannot I recommend just write 'pip3 freeze' and copy output to the proper file.

Does python file with packages to install must be called requirements.txt?

From Requirements files topic from python documentation you can find all explanation regarding the use of a file to install items using pip install. You can also check in the User Guide, it mainly need the right file format that can also be found in Requirements File Format.

It’s important to be clear that pip determines package dependencies
using install_requires metadata, not by discovering requirements.txt
files embedded in projects.

So it also works with:

pip install -r my_pacakges.txt

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