Installing Ray — Ray 2.2.0 (2023)

Ray currently officially supports x86_64 and Apple silicon (M1) hardware.Ray on Windows is currently in beta.

Official Releases#

From Wheels#

You can install the latest official version of Ray from PyPI on linux, windowsand macos as follows:

# Install Ray with support for the dashboard + cluster launcherpip install -U "ray[default]"# Install Ray with minimal dependencies# pip install -U ray

To install Ray libraries:

pip install -U "ray[air]" # installs Ray + dependencies for Ray AI Runtimepip install -U "ray[tune]" # installs Ray + dependencies for Ray Tunepip install -U "ray[rllib]" # installs Ray + dependencies for Ray RLlibpip install -U "ray[serve]" # installs Ray + dependencies for Ray Serve

Daily Releases (Nightlies)#

You can install the nightly Ray wheels via the following links. These daily releases are tested via automated tests but do not go through the full release process. To install these wheels, use the following pip command and wheels:

# Clean removal of previous installpip uninstall -y ray# Install Ray with support for the dashboard + cluster launcherpip install -U "ray[default] @ LINK_TO_WHEEL.whl"# Install Ray with minimal dependencies# pip install -U LINK_TO_WHEEL.whl



Windows (beta)

Linux Python 3.10

MacOS Python 3.10

Windows Python 3.10

Linux Python 3.9

MacOS Python 3.9

Windows Python 3.9

Linux Python 3.8

MacOS Python 3.8

Windows Python 3.8

Linux Python 3.7

MacOS Python 3.7

Windows Python 3.7

Linux Python 3.6

MacOS Python 3.6


On Windows, support for multi-node Ray clusters is currently experimental and untested.If you run into issues please file a report at


Usage stats collection is enabled by default (can be disabled) for nightly wheels including both local clusters started via ray.init() and remote clusters via cli.

Installing from a specific commit#

You can install the Ray wheels of any particular commit on master with the following template. You need to specify the commit hash, Ray version, Operating System, and Python version:


For example, here are the Ray 3.0.0.dev0 wheels for Python 3.7, MacOS for commit ba6cebe30fab6925e5b2d9e859ad064d53015246:

pip install
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There are minor variations to the format of the wheel filename; it’s best to match against the format in the URLs listed in the Nightlies section.Here’s a summary of the variations:

  • For Python 3.8 and 3.9, the m before the OS version should be deleted and the OS version for MacOS should read macosx_10_15_x86_64 instead of macosx_10_15_intel.

  • For MacOS, commits predating August 7, 2021 will have macosx_10_13 in the filename instad of macosx_10_15.

Install Ray Java with Maven#

Before installing Ray Java with Maven, you should install Ray Python with pip install -U ray . Note that the versions of Ray Java and Ray Python must match.Note that nightly Ray python wheels are also required if you want to install Ray Java snapshot version.

The latest Ray Java release can be found in central repository. To use the latest Ray Java release in your application, add the following entries in your pom.xml:

<dependency> <groupId>io.ray</groupId> <artifactId>ray-api</artifactId> <version>${ray.version}</version></dependency><dependency> <groupId>io.ray</groupId> <artifactId>ray-runtime</artifactId> <version>${ray.version}</version></dependency>

The latest Ray Java snapshot can be found in sonatype repository. To use the latest Ray Java snapshot in your application, add the following entries in your pom.xml:

<!-- only needed for snapshot version of ray --><repositories> <repository> <id>sonatype</id> <url></url> <releases> <enabled>false</enabled> </releases> <snapshots> <enabled>true</enabled> </snapshots> </repository></repositories><dependencies> <dependency> <groupId>io.ray</groupId> <artifactId>ray-api</artifactId> <version>${ray.version}</version> </dependency> <dependency> <groupId>io.ray</groupId> <artifactId>ray-runtime</artifactId> <version>${ray.version}</version> </dependency></dependencies>


When you run pip install to install Ray, Java jars are installed as well. The above dependencies are only used to build your Java code and to run your code in local mode.

If you want to run your Java code in a multi-node Ray cluster, it’s better to exclude Ray jars when packaging your code to avoid jar conficts if the versions (installed Ray with pip install and maven dependencies) don’t match.

Install Ray C++#

You can install and use Ray C++ API as follows.

pip install -U ray[cpp]# Create a Ray C++ project template to start with.ray cpp --generate-bazel-project-template-to ray-template


If you build Ray from source, please remove the build option build --cxxopt="-D_GLIBCXX_USE_CXX11_ABI=0" from the file cpp/example/.bazelrc before running your application. The related issue is this.

M1 Mac (Apple Silicon) Support#

Ray has experimental support for machines running Apple Silicon (such as M1 macs). To get started:

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  1. Install miniforge.

    • wget

    • bash

    • rm # Cleanup.

  2. Ensure you’re using the miniforge environment (you should see (base) in your terminal).

    • source ~/.bash_profile

    • conda activate

  3. Ensure that the grpcio package is installed via forge and not pypi. Grpcio currently requires special compilation flags, which pypi will _not_ correctly build with. Miniforge provides a prebuilt version of grpcio for M1 macs.

    • pip uninstall grpcio; conda install grpcio=1.43.0

  4. Install Ray as you normally would.

    • pip install ray


At this time, Apple Silicon ray wheels are being published for releases only. As support stabilizes, nightly wheels will be published in the future.

Windows Support#

Windows support is currently in beta. Please submit any issues you encounter onGitHub.

Installing Ray on Arch Linux#

Note: Installing Ray on Arch Linux is not tested by the Project Ray developers.

Ray is available on Arch Linux via the Arch User Repository (AUR) aspython-ray.

You can manually install the package by following the instructions on theArch Wiki or use an AUR helper like yay (recommended for ease of install)as follows:

yay -S python-ray

To discuss any issues related to this package refer to the comments sectionon the AUR page of python-ray here.

Installing From conda-forge#

Ray can also be installed as a conda package on linux and windows

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# also works with mambaconda create -c conda-forge python=3.9 -n rayconda activate ray# Install Ray with support for the dashboard + cluster launcherconda install -c conda-forge "ray-default"# Install Ray with minimal dependencies# conda install -c conda-forge ray

To install Ray libraries, you can use pip as above or conda/mamba

conda install -c conda-forge "ray-air" # installs Ray + dependencies for Ray AI Runtimeconda install -c conda-forge "ray-tune" # installs Ray + dependencies for Ray Tuneconda install -c conda-forge "ray-rllib" # installs Ray + dependencies for Ray RLlibconda install -c conda-forge "ray-serve" # installs Ray + dependencies for Ray Serve

For a complete list of available ray libraries on Conda-forge, have a lookat


Ray conda packages are maintained by the community, not the Ray team. Whileusing a conda environment, it is recommended to install Ray from PyPi usingpip install ray in the newly created environment.

Building Ray from Source#

Installing from pip should be sufficient for most Ray users.

However, should you need to build from source, follow these instructions for building Ray.

Docker Source Images#

Most users should pull a Docker image from the Ray Docker Hub.

  • The rayproject/ray images include Ray and all required dependencies. It comes with anaconda and various versions of Python.

  • The rayproject/ray-ml images include the above as well as many additional ML libraries.

  • The rayproject/base-deps and rayproject/ray-deps images are for the Linux and Python dependencies respectively.

Images are tagged with the format {Ray version}[-{Python version}][-{Platform}]. Ray version tag can be one of the following:

Ray version tag



The most recent Ray release.


A specific Ray release, e.g. 1.12.1


The most recent Ray development build (a recent commit from Github master)

6 character Git SHA prefix

A specific development build (uses a SHA from the Github master, e.g. 8960af).

The optional Python version tag specifies the Python version in the image. All Python versions supported by Ray are available, e.g. py37, py38, py39 and py310. If unspecified, the tag points to an image using Python 3.7.

The optional Platform tag specifies the platform where the image is intended for:

Platform tag



These are based off of an Ubuntu image.


These are based off of an NVIDIA CUDA image with the specified CUDA version. They require the Nvidia Docker Runtime.


Aliases to a specific -cuXX tagged image.

<no tag>

Aliases to -cpu tagged images. For ray-ml image, aliases to -gpu tagged image.

Example: for the nightly image based on Python 3.8 and without GPU support, the tag is nightly-py38-cpu.

If you want to tweak some aspect of these images and build them locally, refer to the following script:

cd ray./
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Beyond creating the above Docker images, this script can also produce the following two images.

  • The rayproject/development image has the ray source code included and is setup for development.

  • The rayproject/examples image adds additional libraries for running examples.

Review images by listing them:

docker images

Output should look something like the following:

REPOSITORY TAG IMAGE ID CREATED SIZErayproject/ray latest 7243a11ac068 2 days ago 1.11 GBrayproject/ray-deps latest b6b39d979d73 8 days ago 996 MBrayproject/base-deps latest 5606591eeab9 8 days ago 512 MBubuntu focal 1e4467b07108 3 weeks ago 73.9 MB

Launch Ray in Docker#

Start out by launching the deployment container.

docker run --shm-size=<shm-size> -t -i rayproject/ray

Replace <shm-size> with a limit appropriate for your system, for example512M or 2G. A good estimate for this is to use roughly 30% of your available memory (this iswhat Ray uses internally for its Object Store). The -t and -i options here are required to supportinteractive use of the container.

If you use a GPU version Docker image, remember to add --gpus all option. Replace <ray-version> with your target ray version in the following command:

docker run --shm-size=<shm-size> -t -i --gpus all rayproject/ray:<ray-version>-gpu

Note: Ray requires a large amount of shared memory because each objectstore keeps all of its objects in shared memory, so the amount of shared memorywill limit the size of the object store.

You should now see a prompt that looks something like:


Test if the installation succeeded#

To test if the installation was successful, try running some tests. This assumesthat you’ve cloned the git repository.

python -m pytest -v python/ray/tests/
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How to install pandas specific version? ›

To install a specific version of a Python package you can use pip: pip install YourPackage==YourVersion . For example, if you want to install an older version of Pandas you can do as follows: pip install pandas==1.1. 3 .

What is the command to install pip? ›

Run python . 2 This will install or upgrade pip. Additionally, it will install setuptools and wheel if they're not installed already.

Does Ray work on Windows? ›

You can try Ray on Windows via pip install -U ray . Ray provides a simple, universal API for scaling Python applications across compute clusters with minimal effort. Many users love using Ray since it reduces the complexity of building concurrent and distributed programs.

How do I start a Ray server? ›

There are three ways of starting the Ray runtime:
  1. Implicitly via ray. init() (Starting Ray on a single machine)
  2. Explicitly via CLI (Starting Ray via the CLI (ray start))
  3. Explicitly via the cluster launcher (Launching a Ray cluster (ray up))

How to install specific version with pip? ›

How to Pip Install Wheels
  1. Assuming you don't first need to install Python from, you can install a wheel by running the following command: pip install <packagename>
  2. To install a specific version of a package, run the following command: pip install <packagename>==v.v.
  3. For example: pip install django==3.1.13.
Aug 5, 2022

How to install latest version of pandas using pip? ›

To install Pandas using pip, enter pip install pandas or pip3 install pandas in the terminal or command line. To install Pandas using conda, execute the following command on a terminal or command line: conda install pandas.

How do I install pip on terminal? ›

In the Terminal, type python -m ensurepip or python3 -m ensurepip and press Enter. If PIP is missing, ensurepip will install PIP. Follow any additional on-screen instructions to complete this process. If you want to upgrade PIP, type python -m ensurepip –upgrade or python3 -m ensurepip –upgrade instead.

Why is pip not installing in CMD? ›

A “pip: command not found” error occurs when you fail to properly install the package installer for Python (pip) needed to run Python on your computer. To fix it, you will either need to re-install Python and check the box to add Python to your PATH or install pip on your command line.

How do I know if pip is installed? ›

To check to see if pip is installed. Install python. add its path to environment variables. Only, py -m pip --version, worked for me.

Is Ray getting blocked? ›

When you call ray. get() , it blocks until the corresponding object is available or all the objects in the list are available. It returns the objects. In more detail, it blocks until the object corresponding to the object ID is available in Ray's local object store (the objects cached in memory with Plasma).

Why wont my computer play Blu-ray? ›

The computer must have movie player software that supports Blu-ray playback. Windows Media Player and Windows Media Center do not play Blu-ray movies in Windows. If your computer did not come with Blu-ray player software, you might need to install third-party software to play Blu-ray movies.

What app is Ray on? ›

Download the Peacock app and start streaming Ray. You can watch Ray on Peacock. Ray has a running time of 2 hours and 32 mins.

What is a Ray server? ›

Ray Serve is a scalable model serving library for building online inference APIs. Serve is framework agnostic, so you can use a single toolkit to serve everything from deep learning models built with frameworks like PyTorch, Tensorflow, and Keras, to Scikit-Learn models, to arbitrary Python business logic.

Is Ray written in Python? ›

For that, you need special libraries. Ray is a response to both trends. While the API is in Python, the Ray core is written in C++, setting the stage for eventual support for APIs in other languages (a Java API will be next).

What is Ray remote? ›

Ray enables arbitrary functions to be executed asynchronously on separate Python workers. Such functions are called Ray remote functions and their asynchronous invocations are called Ray tasks.

How do I install a specific version? ›

Use npm list [package-name] to know the specific latest version of an installed package. Use npm install [package-name]@[version-number] to install an older version of a package. Prefix a version number with a caret (^) or a tilde (~) to specify to install the latest minor or patch version, respectively.

How do I run pip for a specific version of Python? ›

  1. This is like my answer, but better, since it doesn't need to fiddle with system paths. – Turion. ...
  2. It seems this would now be the best answer. ...
  3. to install pip in the version you want: python3.VERSIONYOUINSTALLED -m ensurepip and then you can use with python3.VERSIONYOUINSTALLED -m pip install PACKAGEYOUWANT.

Does pip always install latest version? ›

Using Requirements Files. The pip install command always installs the latest published version of a package, but sometimes your code requires a specific package version to work correctly.

Can pip update Python version? ›

Using pip you can install/uninstall/upgrade/downgrade any python library that is part of Python Package Index. pip is a PyPI package like any other package in python hence you can use pip command to upgrade its version.

Can you use pip to install pandas? ›

pandas can be installed via pip from PyPI.

How do I update pip in Python 3.10 2? ›

How to Upgrade PIP
  1. Lets check the pip version. ...
  2. Lets try installing a python package. ...
  3. We can also find the latest available version using following command. ...
  4. Lets try first pip install --upgrade pip first. ...
  5. Lets try now pip install pip==19.3.1. ...
  6. Let us check the current version of pip3.

How do I install pip modules? ›

Install Modules with pip
  1. Ensure the pip module is already installed. ...
  2. Verify the release of pip to ensure it is installed correctly. ...
  3. Install the new Python module using the command pip install <module-name> . ...
  4. To list all installed Python modules and packages, use the pip list command.
Jan 28, 2022

How do I manually install a Python package? ›

Which can be helpful in case the package to be installed is not supported by pip or any other reason.
  1. Step 1: Install Python. ...
  2. Step 2: Download Python Package From Any Repository. ...
  3. Step 3: Extract The Python Package. ...
  4. Step 4: Copy The Package In The Site Package Folder. ...
  5. Step 5: Install The Package.
Sep 23, 2022

How manually install pip in Linux? ›

Installing pip for Python 3
  1. Start by updating the package list using the following command: sudo apt update.
  2. Use the following command to install pip for Python 3: sudo apt install python3-pip. ...
  3. Once the installation is complete, verify the installation by checking the pip version: pip3 --version.
Mar 25, 2020

How do I force a program to install with CMD? ›

Open Start. Search for Command Prompt, right-click the top result, and select the Run as administrator option. Type the following command to install an app with the winget command and press Enter: winget install "APP-NAME"

How can I tell if pip is installed or not in CMD? ›

You can get the current PIP version on your system by opening a terminal and typing the command: pip -V. It will show the PIP version and the Python version that is installed on the computer (if any).

Can I install without pip? ›

To install any python library without pip command, we can download the package from in and run it's file using python. This will install the package on your system.

Is pip automatically installed? ›

PIP is automatically installed with Python 2.7. 9+ and Python 3.4+ and it comes with the virtualenv and pyvenv virtual environments.

How do I download and install pip? ›

Step 1: Download the ( file and store it in the same directory as python is installed. Step 2: Change the current path of the directory in the command line to the path of the directory where the above file exists. Step 4: Now wait through the installation process. Voila!

Is pip installed by default? ›

PIP is a package manager for Python packages, or modules if you like. Note: If you have Python version 3.4 or later, PIP is included by default.

Why is Ray off the show? ›

Rey Rosales's character got killed off in a recent episode of The Young and the Restless. He suffered a fatal car accident in the episode airing on Wednesday, April 20, 2022.

Is Ray leaving the show? ›

The news that he would be leaving the show was first announced in a post on Vilasuso's Instagram page in March. "Playing Rey Rosales and being part of the Rosales family was a beautiful chapter in my career," Vilasuso wrote.

How do I get my Blu-ray to work on my computer? ›

Insert a Blu-ray disc into your Blu-ray drive and launch VLC. Select Media > Open Disc. Select the Blu-ray radial, check the box next to no disc menus, and verify that your Blu-ray is selected in the disc device field. Then select Play.

Is there a Blu-ray player for Windows 10? ›

LEAWO Blu ray player allows you to adjust subtitles. Offers support for multiple languages. It allows you to select what to play or make settings on the disc menu during Blu-ray/DVD playback. This Blu ray player for windows 10 offers lossless Blu-ray/DVD to MKV Conversion in Premium Version.

Can Windows 10 Media Player Play Blu-ray? ›

The Blu-ray Disc format is not supported in Windows Media Player. To play a Blu-ray Disc, you need to use a non-Microsoft program that supports Blu-ray playback and a device capable of reading Blu-ray Discs.

Does Roku have Ray? ›

Streaming on Roku. Ray, an anthology series is available to stream now.

Does Amazon Prime do Ray and me? ›

Do, Re & Mi is an Amazon Original animated series for preschoolers that centers on the musical adventures of three best birdie buddies voiced by Kristen Bell, Jackie Tohn, and Luke Youngblood.

Is Ray on HBO Max? ›

Watch Ray | Movies | HBO Max.

How to install pandas 1.1 5? ›

The easiest way to install pandas is to install it as part of the Anaconda distribution, a cross platform distribution for data analysis and scientific computing. This is the recommended installation method for most users.

How to install pandas 1.3 5? ›

  1. Python version support.
  2. Installing pandas. Installing with Anaconda. Installing with Miniconda. Installing from PyPI. Installing with ActivePython. Installing using your Linux distribution's package manager. ...
  3. Running the test suite.
  4. Dependencies. Recommended dependencies. Optional dependencies. Visualization. Computation.

How do I install a specific version of APT install? ›

How to Install Specific Version of Package using apt
  1. Check the available versions of packages.
  2. Install a specific version of a package. a. Simulate the installation. b. List the installed packages with the versions.
  3. Conclusion.
Jun 18, 2022

How do I install a specific version of NumPy? ›

  1. Installing NumPy. Step 1: Check Python Version. Step 2: Install Pip. Step 3: Install NumPy. Step 4: Verify NumPy Installation. Step 5: Import the NumPy Package.
  2. Upgrading NumPy.
May 8, 2020

Can I pip install pandas? ›

pandas can be installed via pip from PyPI.

How to install pandas 1.2 0? ›

The easiest way to install pandas is to install it as part of the Anaconda distribution, a cross platform distribution for data analysis and scientific computing. This is the recommended installation method for most users.

How do I manually install Python? ›

Which can be helpful in case the package to be installed is not supported by pip or any other reason.
  1. Step 1: Install Python. ...
  2. Step 2: Download Python Package From Any Repository. ...
  3. Step 3: Extract The Python Package. ...
  4. Step 4: Copy The Package In The Site Package Folder. ...
  5. Step 5: Install The Package.
Sep 23, 2022

How do I install Python 3.7 packages? ›

Option 2: Install Python 3.7 From Source Code (Latest Version)
  1. Step 1: Update Local Repositories. ...
  2. Step 2: Install Supporting Software. ...
  3. Step 3: Download the Latest Version of Python Source Code. ...
  4. Step 4: Extract Compressed Files. ...
  5. Step 5: Test System and Optimize Python. ...
  6. Step 6: Install a Second Instance of Python (recommended)
Dec 12, 2019

How do you install pandas pip install? ›

Here is the how-to to install Pandas for Windows:
  1. Install Python.
  2. Type in the command “pip install manager”
  3. Once finished, type the following: Copy. *pip install pandas* Wait for the downloads to be over and once it is done you will be able to run Pandas inside your Python programs on Windows. Report. Sign in to comment.
Sep 16, 2020

How do I install Python 3.8 package? ›

How to install Python?
  1. Click the download button and you will see Python 3.8. ...
  2. Click Python 3.8. ...
  3. Next, right click the mouse button you will see open button click to open.
  4. Enable to add Python 3.8 to path and click install now.
  5. Wait a few minutes and display setup was successful.
Mar 2, 2020

What is apt install command? ›

Apt. The apt command is a powerful command-line tool, which works with Ubuntu's Advanced Packaging Tool (APT) performing such functions as installation of new software packages, upgrade of existing software packages, updating of the package list index, and even upgrading the entire Ubuntu system.

What is apt install command in Linux? ›

Advanced Package Tool, more commonly known as APT, is a collection of tools used to install, update, remove, and otherwise manage software packages on Debian and its derivative operating systems, including Ubuntu and Linux Mint.

Do you have to pip install NumPy? ›

NumPy can be installed with conda , with pip , with a package manager on macOS and Linux, or from source.

How to install specific version of Python in virtual environment? ›

  1. Open Command Prompt and enter pip install virtualenv.
  2. Download the desired python version (do NOT add to PATH!), and remember the path\to\new_python.exe of the newly installed version.
  3. To create a virtualenv, open Command Prompt and enter.
Jun 15, 2019


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