Download an older version of pip package

Now, in package 2. In my case, this manifested with strange syntax errors because the newer version of the package added a file that was only compatible with Python 3, and when I downgraded package versions to support Python 2, I continued importing the Pythononly module.

Based on this, I would argue that uninstalling the old package is always preferable to using -I when updating installed package versions. There are 2 ways you may install any package with version:- A. If you want to update to latest version and you don't know what is the latest version you can type. Stack Overflow for Teams — Collaborate and share knowledge with a private group.

Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Installing specific package versions with pip Ask Question. Asked 10 years, 8 months ago. Active 2 months ago. Viewed 2. Mateen Ulhaq Joe Joe Add a comment.

Active Oldest Votes. TL;DR: pip install -Iv i. Mahmoud Abdelkader Mahmoud Abdelkader There should be no problem with having multiple versions though, that's the point of creating new folders for every version and using. Curious why you use the -I option if we have already removed the existing installation - could you give some detail on that?

What's the difference between -I and -Iv? This should point to a repository compliant with PEP the simple repository API or a local directory laid out in the same format.

Extra URLs of package indexes to use in addition to --index-url. Should follow the same rules as --index-url. If a URL or path to an html file, then parse for links to archives such as sdist.

Download a package and all of its dependencies with OSX specific interpreter constraints. This forces OSX It will also match deps with platform any. Also force the interpreter version to 27 or more generic, i. For most Unix systems, you must download and compile the source code. The same source code archive can also be used to build the Windows and Mac versions, and is the starting point for ports to all other platforms. Download the latest Python 3 and Python 2 source.

This site hosts the "traditional" implementation of Python nicknamed CPython. A number of alternative implementations are available as well. Source and binary executables are signed by the release manager or binary builder using their OpenPGP key.

Release files for currently supported releases are signed by the following:. Release files for older releases which have now reached end-of-life may have been signed by one of the following:. You can import a person's public keys from a public keyserver network server you trust by running a command like:. On the version-specific download pages, you should see a link to both the downloadable file and a detached signature file. While we generally recommend using pip to install Biopython using the wheel packages we provide on PyPI as above , there are also Biopython packages for Conda, Linux, etc.

You can then download and unzip a Biopython source code release, or get our code from GitHub. Then run:. If you are still stuck, sign up to the Biopython mailing list and ask for help there.