Скачать или смотреть How to Install vaex on Python 3.7.5 and Ubuntu 18.04 without LLVM Issues

A comprehensive guide on resolving LLVM-related installation issues for the `vaex` library on Ubuntu 18.04 with Python 3.7.5.
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This video is based on the question https://stackoverflow.com/q/63616051/ asked by the user 'SteveS' ( https://stackoverflow.com/u/1030099/ ) and on the answer https://stackoverflow.com/a/63618859/ provided by the user 'SteveS' ( https://stackoverflow.com/u/1030099/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Install vaex on Python 3.7.5 and Ubuntu 18.04 without LLVM Issues

Installing Python packages can sometimes lead to headaches, particularly when dealing with dependencies like LLVM. If you're trying to install the vaex library on Python 3.7.5 and Ubuntu 18.04, you may encounter errors related to the LLVM configuration. This post will walk you through a clear, step-by-step process to resolve those installation woes.

The Problem: LLVM and vaex Installation Issues

While attempting to install the vaex package using the command:

[[See Video to Reveal this Text or Code Snippet]]

you might run into an error like this:

[[See Video to Reveal this Text or Code Snippet]]

This message indicates that llvm-config is missing from your environment, which is critical for the installation of libraries that depend on LLVM, such as llvmlite, which vaex requires.

Understanding the Error

The underlying issue occurs because the installation process of vaex tries to invoke llvm-config to check the installed version of LLVM, but it can't find it, leading to a cascade of errors during the build process.

The Solution: Step-by-Step Guide

To overcome this error, follow these simple steps:

Step 1: Remove Existing LLVM Packages

First, you need to clear any potentially conflicting versions of LLVM that may be installed. You can do this by locating the llvm packages in your Python's dist-packages directory. Once found, manually delete all LLVM versions. Here’s how to identify and delete them:

Navigate to your dist-packages directory. This is usually found in lib/python3.7/dist-packages/ or a similar path depending on your installation.

Delete the following directories and files related to llvm:

llvmlite

Any installed versions of llvm (e.g., llvmlite-<version>.egg-info, etc.)

Step 2: Install the Latest Version of pip

Before proceeding to install vaex, it’s essential to ensure that you have the latest version of pip. You can update pip by running:

[[See Video to Reveal this Text or Code Snippet]]

This command upgrades pip to the latest version, which may help resolve dependency issues during installations.

Step 3: Install Required Dependencies

Next, you should manually install compatible versions of llvmlite and numba. The specific versions mentioned in the original query were:

[[See Video to Reveal this Text or Code Snippet]]

You can install these with the following commands:

[[See Video to Reveal this Text or Code Snippet]]

Step 4: Reinstall vaex

Now that the necessary dependencies are in place, you can reinstall vaex:

[[See Video to Reveal this Text or Code Snippet]]

This time, vaex should successfully install along with the required version of llvmlite (0.34.0) and an updated numba version.

Step 5: Verify the Installation

To ensure everything has been installed correctly, run:

[[See Video to Reveal this Text or Code Snippet]]

If you see the version number printed without error, you have successfully solved the installation issue!

Conclusion

Installing vaex on Ubuntu 18.04 with Python 3.7.5 doesn't have to be a daunting process. By clearing out older LLVM files, updating pip, and carefully managing the installation of dependencies, you can avoid the llvm related errors and enjoy the powerful features that vaex offers.

If you encounter any further issues, don’t hesitate to reach out. Happy coding!