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How To Install Channels in Django with Failed Building Wheel for Twisted Error

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In this article, we will walk you through the process of installing Channels in Django, particularly when you encounter the “Failed Building Wheel for Twisted Error”. This error is common and can be resolved by following the steps outlined below.

Quick Answer

To resolve the "Failed Building Wheel for Twisted Error" when installing Channels in Django, you need to update your system, install the python3.6-dev package, and then install Twisted again using pip. If the issue persists, you may also need to install the build-essential package. Finally, you can install Channels by running pip install -U channels.

What is Django Channels?

Django Channels is a project that takes Django and extends its abilities beyond HTTP – to handle WebSockets, chat protocols, IoT protocols, and more. It’s built on a Python specification called ASGI.

What is the “Failed Building Wheel for Twisted Error”?

The “Failed Building Wheel for Twisted Error” is a common error that occurs when trying to install Channels in Django. The error message suggests that you are missing the python3.6-dev package.

How to Resolve the Error

Step 1: Update Your System

Before installing any new packages, it’s a good idea to update your system’s package list. This can be done by running the following command:

sudo apt update

sudo allows you to run commands with administrative privileges, while apt update updates the list of available packages and their versions, but it does not install or upgrade any packages.

Step 2: Install the python3.6-dev Package

The next step is to install the python3.6-dev package. This package contains the header files you need to build Python extensions. Run the following command to install it:

sudo apt install python3.6-dev

apt install is used to install a new package.

Step 3: Install Twisted Again

After installing python3.6-dev, you can try installing Twisted again using pip:

pip install twisted

pip is a package installer for Python. You can use it to install packages from the Python Package Index and other indexes.

In case the issue persists, you may also need to install the build-essential package. This package includes a bunch of software that is essential for building Ubuntu packages including gcc compiler, make and other required tools. You can do this by running:

sudo apt-get install build-essential python3.6-dev

Step 4: Install Channels

Once you have successfully installed Twisted, you can proceed to install Channels by running:

pip install -U channels

The -U flag (or --upgrade) is for upgrading all specified packages to the newest available version.

Conclusion

By following these steps, you should be able to resolve the “Failed Building Wheel for Twisted Error” and successfully install Channels in Django. If you encounter any issues, make sure you are using the correct version of Python (3.6.3) in your virtual environment. If you’re still having trouble, don’t hesitate to seek help from the Django community or the Channels project maintainers.

What is the purpose of installing the `python3.6-dev` package?

The python3.6-dev package contains the header files needed to build Python extensions. It is required to resolve the "Failed Building Wheel for Twisted Error" when installing Channels in Django.

What does the `sudo apt update` command do?

The sudo apt update command updates the system’s package list, which includes information about the available packages and their versions. It is recommended to run this command before installing any new packages to ensure you have the latest information.

How can I install the `python3.6-dev` package?

To install the python3.6-dev package, you can use the command sudo apt install python3.6-dev. This command will install the necessary header files required for building Python extensions.

What is the purpose of the `pip install twisted` command?

The pip install twisted command is used to install the Twisted package, which is a dependency for Channels in Django. Twisted is an event-driven networking engine written in Python and is required for the proper functioning of Channels.

How can I install the `build-essential` package?

To install the build-essential package, you can use the command sudo apt-get install build-essential. This package includes essential software for building Ubuntu packages, such as the gcc compiler and other required tools. It may be necessary to install this package if the issue with Twisted installation persists.

How can I install Channels in Django?

After successfully installing Twisted and resolving any related issues, you can install Channels in Django by running the command pip install -U channels. The -U flag is used to upgrade all specified packages to the newest available version.

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