How to install Kivy¶

Time 🕐

Estimated time of completion: 30min to 1h (depending on your experience and your operating system)

Requirements¶

Before installing Kivy, you need to install some tools and libraries:

Git
Pyenv
Poetry

We strongly recommend you to follow this guide to install the required tools and libraries. If you ever need help, go to any support channel in the Official Kivy Discord.

Installation Guide¶

Please, choose your operating system and follow the instructions below:

macOSLinux - UbuntuWindowsLinux - FedoraLinux - Arch

This is the macOS installation guide. If you are using another operating system, please, select it from the menu above.

How to open the terminal on macOS

You can open the terminal on macOS by pressing ⌘ + Space and typing terminal in the search bar.

Tip 💡

If you are using macOS, we recommend you to use Homebrew to install the required tools and libraries. Enter the website and follow the instructions to install Homebrew. This will make your life easier.

Step 1: Check if you have Homebrew installed

What is Homebrew?

Homebrew is a free and open-source software package management system that simplifies the installation of software on Apple's operating system, macOS, as well as Linux.

from Wikipedia

How to check if you have Homebrew installed

Press ⌘ + Spacebar, type terminal and press enter
Type brew --version and press enter.

$ brew --version

Homebrew 3.6.20

Select the result that matches your case:

Homebrew 3.6.20zsh: command not found: brew

If you see "zsh: command not found: brew", click on the menu above.
If you see "Homebrew {version}", you have Homebrew installed. You can skip this step.

If you see zsh: command not found: brew, the command brew was not found. There are two possible reasons:

You don't have Homebrew installed.
You have Homebrew installed, but you need to add it to your PATH.

Check if one of these folders exist: /opt/homebrew/ or /usr/local/homebrew/. If one of these folders exist, you need to add Homebrew to your PATH. Open the terminal and type:

export PATH=/opt/homebrew/bin:$PATH

Close the terminal and open it again. Type brew --version and press enter. If you see Homebrew {version}, you have Homebrew installed. You can skip this step.

If you are still seeing zsh: command not found: brew, you don't have Homebrew installed, you can install it by following the instructions on the Homebrew website.

Step 2: Check if you have Xcode Command Line Tools installed

What are Xcode Command Line Tools?

"Xcode Command Line Tools are tools for software developers that run on the command line, in the Terminal application. Since before Apple's beginnings, this assortment of Unix-based tools have been the foundation of almost all software development.

Out of the box, a Mac doesn't contain all of the software and tools needed for programming. Instead, Apple provides a complete development environment for programmers named Xcode, which is available separately for download and installation"

from Mac Install Guide

How to check if you have Xcode Command Line Tools installed

Press ⌘ + Spacebar, type terminal and press enter
Type xcode-select --install and press enter.

$ xcode-select --install

---> 100%

If this message appears:

xcode-select: error: command line tools are already installed, use "Software Update" to install updates

You can skip this step. Otherwise, type git --version and press enter.

If your result is similar to the previous video, congratulations! You have successfully installed Xcode Command Line Tools.

Step 3: Install Pyenv

What is Pyenv?

Pyenv is a simple Python version management tool. It lets you easily switch between multiple versions of Python. It's simple, unobtrusive, and follows the UNIX tradition of single-purpose tools that do one thing well.

from pyenv

How do I install Pyenv?

Preferably, you should install Pyenv using Homebrew. But you can also install it from source.

Using HomebrewFrom source

Press ⌘ + Spacebar, type terminal and press enter
Type brew install openssl readline sqlite3 xz zlib and press enter.

$ brew install openssl readline sqlite3 xz zlib

Type brew update and press enter.

$ brew update

Type brew install pyenv and press enter.

$ brew install pyenv

Close the terminal and open it again. Type pyenv --version and press enter. If you see pyenv {version}, you have successfully installed Pyenv.

Press ⌘ + Spacebar, type terminal and press enter
Type git clone https://github.com/pyenv/pyenv.git ~/.pyenv and press enter.

$ git clone https://github.com/pyenv/pyenv.git ~/.pyenv

Type cd .pyenv and press enter

$ cd .pyenv

Type make -s -j2 and press enter

$ make -s -j2

Type cd src and press enter

$ cd src

Type the following multiline code and press enter

CPPFLAGS="-I/opt/local/include" \
LDFLAGS="-L/opt/local/lib" \
./configure --with-pydebug

Type cd .. and press enter

$ cd ..

Type the following multiline code and press enter

echo 'export PYENV_ROOT="$HOME/.pyenv"' >> ~/.zshrc
echo 'export PATH="$PYENV_ROOT/bin:$PATH"' >> ~/.zshrc
echo 'eval "$(pyenv init --path)"' >> ~/.zshrc

Close the terminal and open it again. Type pyenv --version and press enter. If you see an output like this, you have successfully installed Pyenv.

Step 4: Install Python

How do I install Python?

Type pyenv install 3.10.9 and press enter. This will install Python 3.10.9.

$ pyenv install 3.10.9

Type pyenv versions and press enter. This will show you all the Python versions you have installed with Pyenv.

$ pyenv versions

* system
3.10.9 (set by /Users/kivyschool/.python-version)

Type PATH=$(pyenv root)/shims:$PATH and press enter. This will add the path to the shims folder to the PATH variable. This will allow you to use the Python version you installed.

$ PATH=$(pyenv root)/shims:$PATH

Type python --version and press enter. If you see Python 3.10.9, you have successfully installed Python.

$ python --version

Also, if you type which python and press enter, you should see something like /Users/kivyschool/.pyenv/shims/python. This means that you are using the Python version you installed with Pyenv.

Step 5: Install Poetry

How do I install Poetry?

Press ⌘ + Spacebar, type terminal and press enter
Type curl -sSL https://install.python-poetry.org | python3 - and press enter. This will install Poetry.

$ curl -sSL https://install.python-poetry.org | python3 -

---> 100%

Close the terminal and open it again. Type poetry --version and press enter. If you see something like Poetry (version 1.3.2), you have successfully installed Poetry.

Poetry configuration

Type poetry config virtualenvs.in-project true and press enter. This will set the virtual environment to be created in the project folder.

$ poetry config virtualenvs.in-project true

Type poetry config virtualenvs.create true and press enter. This will set the virtual environment to be created automatically when you run poetry install.

$ poetry config virtualenvs.create true

Step 6: Start a new project with Poetry

How to start a new project with Poetry?

Press ⌘ + Spacebar, type terminal and press enter
Type mkdir kivy_school and press enter. This will create a new folder called kivy_school.

$ mkdir kivy_school

Type cd kivy_school and press enter. This will change the current directory to kivy_school.

$ cd kivy_school

Type poetry init and press enter. This will start the Poetry wizard.

$ poetry init

Just press enter to accept the default values. You can change them later. Once the wizard is finished, you will see a pyproject.toml file in the kivy_school directory. This is the Poetry configuration file, which contains the project dependencies. This means that any library you install using Poetry will be added to this file. This is super useful because you can share this file with other developers and they will be able to install the same dependencies as you have.

Check the Python version used by Poetry

You need to check this only once. Do it now.

Make sure that Poetry is using the Python version you installed with pyenv. Type poetry env info and press enter. You should see something like this:

Virtualenv
Python:         3.10.9
Implementation: CPython
Path:           /Users/kivyschool/kivy_school/.venv
Executable:     /Users/kivyschool/kivy_school/.venv/bin/python
Valid:          True

System
Platform:   darwin
OS:         posix
Python:     3.10.9
Path:       /Users/kivyschool/.pyenv/versions/3.10.9
Executable: /Users/kivyschool/.pyenv/versions/3.10.9/bin/python3.10

Pay attention to the Path and Executable fields used by System. They should point to the Python version you installed with Pyenv. To make sure that poetry is using the correct Python version, you can type poetry env use $(pyenv which python) and press enter.

$ poetry env use $(pyenv which python)

Activate the virtual environment by typing poetry shell and pressing enter.

$ poetry shell

Type poetry add kivy and press enter. This will install Kivy.

$ poetry add kivy

That's it! You have successfully installed Kivy using Pyenv and Poetry.

Step 7: Run a Kivy "Hello world" example

Create a file called main.py and paste the following code in it.

main.py
from kivy.app import runTouchApp
from kivy.lang import Builder

runTouchApp(Builder.load_string('''
Button:
    text: 'Hello world'
'''))

On your terminal, type python main.py and press enter. This will run the Kivy "Hello world" example.

$ python main.py

Prepare your heart for the magic!

Congratulations! You have successfully installed Kivy using Pyenv and Poetry.

This is the Ubuntu installation guide. If you are using another operating system, please, select it from the menu above.

Step 1: Check if you have Git installed

What is Git?

Git is a distributed version control system that enables multiple developers to collaborate on a project efficiently by tracking changes, managing different versions, and facilitating code integration. It allows developers to create branches for independent development, commit snapshots of their code, and merge changes seamlessly. It stores the entire project history locally on each developer's machine, ensuring data redundancy and offline access. Popular platforms like GitHub, GitLab, and Bitbucket host remote Git repositories, enhancing collaboration with additional tools and services.

How to check if you have Git installed?

Open the terminal by pressing Ctrl + Alt + T
Type git --version and press enter. If you see the Git version, you have Git installed.
If you don't have Git installed, you can install it by typing sudo apt-get install git and pressing enter.

Step 2: Install build dependencies

What are build dependencies?

Build dependencies are the libraries, tools, and other resources required to compile and build a software project. These dependencies ensure that the project can be successfully compiled and run in a development or production environment.

How to install build dependencies?

Update the package list by typing sudo apt update and pressing enter.

$ sudo apt update

Install the build dependencies

$ sudo apt install build-essential libssl-dev zlib1g-dev libbz2-dev libreadline-dev libsqlite3-dev curl libncursesw5-dev xz-utils tk-dev libxml2-dev libxmlsec1-dev libffi-dev liblzma-dev

Step 3: Install Pyenv

What is Pyenv?

Pyenv is a simple python version management tool. It lets you easily switch between multiple versions of Python. It's simple, unobtrusive, and follows the UNIX tradition of single-purpose tools that do one thing well.

from pyenv

How do I install Pyenv?

Open the terminal by pressing Ctrl + Alt + T
Type git clone https://github.com/pyenv/pyenv.git ~/.pyenv

$ git clone https://github.com/pyenv/pyenv.git ~/.pyenv

Compile Pyenv

$ cd ~/.pyenv && src/configure && make -C src

Run the following commands on your terminal to add Pyenv to your path

$ echo 'export PYENV_ROOT="$HOME/.pyenv"' >> ~/.bashrc
$ echo 'command -v pyenv >/dev/null || export PATH="$PYENV_ROOT/bin:$PATH"' >> ~/.bashrc
$ echo 'eval "$(pyenv init -)"' >> ~/.bashrc

Close the terminal and open it again. Type pyenv --version and press enter. If you see something like pyenv 2.3.14, you have successfully installed Pyenv.

Step 4: Install Python using Pyenv

How to install Python?

Open the terminal by pressing Ctrl + Alt + T
Type pyenv install 3.10.9 and press enter. This will install Python 3.10.9.

$ pyenv install 3.10.9

Type pyenv versions and press enter. This will show you all the Python versions you have installed with Pyenv.

$ pyenv versions

* system
3.10.9 (set by /home/kivyschool/.pyenv/version)

Type pyenv global 3.10.9 and press enter. This will set the global Python version to 3.10.9.

$ pyenv global 3.10.9

Type python --version and press enter. If you see Python 3.10.9, you have successfully set the global Python version to 3.10.9.

$ python --version

Step 5: Install Poetry

What is Poetry?

Poetry is a tool for dependency management and packaging in Python. It allows you to declare the libraries your project depends on and it will manage (install/update) them for you. Poetry offers a lockfile to ensure repeatable installs, and can build your project for distribution.

from Python Poetry

How to install Poetry?

Open the terminal by pressing Ctrl + Alt + T
Type curl -sSL https://install.python-poetry.org | python3 - and press enter. This will install Poetry.

$ curl -sSL https://install.python-poetry.org | python3 -

Add Poetry to your path by typing echo 'export PATH="$HOME/.local/bin:$PATH"' >> ~/.bashrc and pressing enter.

$ echo 'export PATH="$HOME/.local/bin:$PATH"' >> ~/.bashrc

Close the terminal and open it again. Type poetry --version and press enter. If you see something like Poetry version 1.4.0, you have successfully installed Poetry.

Poetry configuration

Here we are going to configure Poetry to always create the virtual environment in the project folder for future projects. This will make sure that you don't have to configure it again. Also, we are going to configure Poetry to create the virtual environment automatically when you run poetry install.

Type poetry config virtualenvs.in-project true and press enter. This will set the virtual environment to be created in the project folder.

$ poetry config virtualenvs.in-project true

Type poetry config virtualenvs.create true and press enter. This will set the virtual environment to be created automatically when you run poetry install.

$ poetry config virtualenvs.create true

Step 6: Start a Kivy project using Poetry

How to create a Kivy project?

Here we are going to create a folder called kivy_school, initialize a Poetry project, and install Kivy. Then we are going to run a Kivy "Hello world" example.

Open the terminal by pressing Ctrl + Alt + T
Type mkdir kivy_school and press enter. This will create a new directory called kivy_school.

$ mkdir kivy_school

Type cd kivy_school and press enter. This will change the current directory to kivy_school.

$ cd kivy_school

Type poetry init and press enter. This will start the Poetry wizard.

$ poetry init

Always press enter to accept the default values, except on "Compatible Python versions" part. It will ask you things like:

Package name, Version, Description, Author, License (accept default values by just pressing enter)
Compatible Python versions: type 3.11.7 and press enter
Would you like to define your main dependencies interactively? Just press enter twice.
Would you like to define your development dependencies interactively? Just press enter twice.
Do you confirm generation? (yes/no) [yes]

Do not worry if you make anything wrong during the wizard, you can change them later.

Once the wizard is finished, you will see a pyproject.toml file in the kivy_school directory. This is the Poetry configuration file, which contains the project dependencies. This means that any python library you install using Poetry will be added to this file. This is super useful because you can share this file with other developers and they will be able to install the same dependencies as you have.

Check the Python version used by Poetry

You need to check this only once. Do it now.

Make sure that poetry is using the python version you installed with pyenv. Type poetry env info and press enter. You should see something like this:

Virtualenv
Python:         3.10.9
Implementation: CPython
Path:           NA
Executable:     NA

System
Platform:   linux
OS:         posix
Python:     3.10.9
Path:       /home/kivyschool/.pyenv/versions/3.10.9
Executable: /home/kivyschool/.pyenv/versions/3.10.9/bin/python3.10

Pay attention to the Path and Executable fields used by Virtualenv. They should point to the Python version you installed with Pyenv. To make sure that poetry is using the correct Python version, you can type poetry env use $(pyenv which python) and press enter.

$ poetry env use $(pyenv which python)

Activate the virtual environment by typing poetry shell and pressing enter.

$ poetry shell

Type poetry add kivy and press enter. This will install Kivy.

$ poetry add kivy

That's it! You have successfully installed Kivy using Pyenv and Poetry.

Step 7: Run a Kivy "Hello world" example

Create a file called main.py and paste the following code in it.

main.py
from kivy.app import runTouchApp
from kivy.lang import Builder

runTouchApp(Builder.load_string('''
Button:
    text: 'Hello world'
'''))

On your terminal, type python main.py and press enter. This will run the Kivy "Hello world" example.

$ python main.py

Prepare your heart for the magic!

Congratulations! You have successfully installed Kivy using Pyenv and Poetry.

This is the Windows installation guide. If you are using another operating system, please, select it from the menu above.

What is the plan?

The plan is to install Git, Pyenv and Poetry on Windows. Then we are going to create a Kivy project and run a Kivy "Hello world" example.

Step 1: Install Git

What is Git?

Git is a version control system. You use git so you can manage several projects at once. As you can imagine, different projects require different tools and dependencies. Git is one way to control your projects so that you don't have to struggle remembering what package goes where a few weeks after you actually installed your package. It is also used with online repositories like Github and Gitlab.

How do I install Git?

Git download link
Download Git for Windows and follow the installer. The default settings should be fine. You can change the initial branch name to anything you like (or easier/faster to type) like main or dev instead of the long default of master. We recommend using main as the default branch name.

Why should I change the default branch name?

If you stick to the default, you will have to type master very often. A common command will be git checkout master or git merge origin master, which will be shortened to: git checkout main if using main.

Step 2: Install Pyenv

What is Pyenv?

Pyenv is a version management tool for Python. This is important because you do not want to install several versions of Python in your default system's PATH. Instead, you want to use Pyenv and the command poetry env use to manage different versions of Python for your projects.

How do I install Pyenv?

Original documentation for installing pyenv

Using PowershellUsing git

How to open a Powershell terminal as admin?

You can hit the ⊞ Windows key and type Powershell
Then either right click on the Powershell icon and click on "run as administrator" or the "run as administrator" button on the right side of the start screen

Run Powershell as administrator and execute the following before installing pyenv-win:

£C:\Users\KivySchool Set-ExecutionPolicy -ExecutionPolicy RemoteSigned -Scope LocalMachine

Type Y for "yes".

In Powershell, install pyenv-win by executing the following:

£C:\Users\KivySchool Invoke-WebRequest -UseBasicParsing -Uri "https://raw.githubusercontent.com/pyenv-win/pyenv-win/master/pyenv-win/install-pyenv-win.ps1" -OutFile "./install-pyenv-win.ps1"; &"./install-pyenv-win.ps1"

If the install fails, try doing the install command again before Googling your error.

Reference for git installation of pyenv:
- git clone instructions
- Using powershell to add pyenv to path
Open Command Prompt

How to open Command Prompt?

⊞ Windows key
Type "cmd" without quotes
Press Enter

In Command Prompt, type:

£C:\Users\KivySchool git clone https://github.com/pyenv-win/pyenv-win.git "%USERPROFILE%\.pyenv"

What does it mean to add to PATH?

Adding a program to PATH means that your system by default can activate it from the terminal. If you don't have pyenv in your PATH you will get: 'pyenv' is not recognized as an internal or external command, operable program or batch file.

Now add pyenv to PATH:
Open a new Powershell instance

Copy paste the commands, one at a time:

£C:\Users\KivySchool [System.Environment]::SetEnvironmentVariable('PYENV',$env:USERPROFILE + "\.pyenv\pyenv-win\","User")

£C:\Users\KivySchool [System.Environment]::SetEnvironmentVariable('PYENV_ROOT',$env:USERPROFILE + "\.pyenv\pyenv-win\","User")

£C:\Users\KivySchool [System.Environment]::SetEnvironmentVariable('PYENV_HOME',$env:USERPROFILE + "\.pyenv\pyenv-win\","User")

£C:\Users\KivySchool [System.Environment]::SetEnvironmentVariable('path', $env:USERPROFILE + "\.pyenv\pyenv-win\bin;" + $env:USERPROFILE + "\.pyenv\pyenv-win\shims;" + [System.Environment]::GetEnvironmentVariable('path', "User"),"User")

Check if pyenv is installed

Open a new command prompt terminal and type: pyenv
The response should be your pyenv version and options for commands

If there's no errors, proceed to the next step.

Step 3: Install Python using Pyenv

How do I install Python?

Open a new command prompt terminal and type pyenv install 3.10.9 and press enter. This will install Python 3.10.9.

£C:\Users\KivySchool\ pyenv install 3.10.9

Type pyenv versions and press enter. This will show you all the Python versions you have installed with Pyenv.

£C:\Users\KivySchool\ pyenv versions

* system
3.10.9 (set by C:\Users\kivyschool\.pyenv\pyenv-win\version)

Type pyenv global 3.10.9 and press enter. This will set the global Python version to 3.10.9.

£C:\Users\KivySchool\ pyenv global 3.10.9

Type python --version and press enter. If you see Python 3.10.9, you have successfully set the global Python version to 3.10.9.

£C:\Users\KivySchool\ python --version
Python 3.10.9

Step 4: Install Poetry

What is Poetry?

Poetry is a tool for dependency management and packaging in Python. It allows you to declare the libraries your project depends on and it will manage (install/update) them for you. Poetry offers a lockfile to ensure repeatable installs, and can build your project for distribution. This is necessary for packaging to Android as buildozer installation and dependency install will be handled for you by Poetry.

Python Poetry Homepage Link

How do I install Poetry?

Installing Poetry on your Windows machine using Powershell and Pyenv

Official Poetry installation link.
Open a new Powershell terminal and check that Python is available:

£C:\Users\KivySchool\ python

You can type exit() to leave the Python interpreter in Powershell.

Python is not installed!

If Python is not installed, you can use Pyenv to install and set a Python version with these commands. The Pyenv installation instructions are above.

£C:\Users\KivySchool\ pyenv install 3.10.9

£C:\Users\KivySchool\ pyenv global 3.10.9

If you don't have Python 3.10.9 available for your machine, you can use

£C:\Users\KivySchool\ pyenv install -l -o

to find a Python version available for your machine and use

£C:\Users\KivySchool\ pyenv global (your installed version)

Example

If you installed Python 3.10.7 with pyenv install 3.10.7, you would type this to set your global Python version to 3.10.7:

pyenv global 3.10.7

If you needed to install Python, open a new Powershell terminal so that it has Python available. If your Powershell terminal already had Python installed, you can use it for the next section.
Then, type in Powershell:

£C:\Users\KivySchool\ (Invoke-WebRequest -Uri https://install.python-poetry.org -UseBasicParsing).Content | python -

Now add Poetry to your system's PATH:

What does it mean to add to PATH? Command Prompt cannot find Poetry after installation!

Adding a program to path means that your system can activate it by default from the terminal. If you don't have poetry in your PATH you will get:

'poetry' is not recognized as an internal or external command, operable program or batch file.

To manually add a file to your PATH:

Press ⊞ Windows key
Type "PATH"
Click "Edit the system control variables"
Make sure you are in the "Advanced" tab
Click "Environment Variables"
Under system variables, click Path, then "Edit". (You might get PATH problems if you are a user that is not an admin and use the user variables.)
Click "New" line, then add the folder that Poetry is installed in as a new line:
Poetry by default is installed in: %APPDATA%\Python\Scripts (which can resolve to ...\APPDATA\Roaming\Python\Scripts)
To confirm that Poetry is installed (or you suspect it did not complete install), you can press ⊞ Windows key > type "File Explorer" and copy paste %APPDATA%\Python\Scripts in the address bar.
There should be a "poetry.exe" in this folder.

To check if you have added Poetry to PATH, make a new command prompt (press ⊞ Windows key > cmd)
Type in cmd:

£C:\Users\KivySchool\ poetry --version

Check if Poetry is installed

Hit ⊞ Windows key and type: cmd
Type poetry -v, poetry -version, or simply poetry.
If you see no errors, Poetry is installed.

Poetry configuration

Why set the virtual environment in the project?

At some point, you will end up reading a lot source code. It's easier to have the environment in an accessible place per project so you can have quick access to your dependencies. Having your virtual environment in the same folder as your project makes it easier to find the right dependency to read. Just remember to exclude the environment folder in your .gitignore file so git doesn't upload your entire environment online.

Here we are going to configure Poetry to always create the virtual environment in the project folder for future projects. This will make sure that you don't have to configure it again. Also, we are going to configure Poetry to create the virtual environment automatically when you run poetry install.

Type poetry config virtualenvs.in-project true and press enter. This will set the virtual environment to be created in the project folder.

£C:\Users\KivySchool\  poetry config virtualenvs.in-project true

Type poetry config virtualenvs.create true and press enter. This will set the virtual environment to be created automatically when you run poetry install.

£C:\Users\KivySchool\  poetry config virtualenvs.create true

There will be no success message, but you will know it works when Poetry makes a .venv folder in your first project. There, you can see the Python version, and all the libraries associated with that project in the "Lib" folder.

Step 5a: Install Visual Studio Code (Optional)

What is VS Code?

VS Code is a text editor that is easy to use and also gives easy access to Command Prompt and Powershell with

CTRL + J

We use VS Code for this tutorial because it is easy to use and has a lot of extensions that make it easy to use for beginners. You can use any text editor you want, but we recommend VS Code.

Download and install VS Code from: https://code.visualstudio.com/
The defaults are good enough to use, so follow through the installer.

Step 5b: Install Kivy using Poetry

Now it's time to make your own "Hello world!" app!

Quick Hello world! Kivy app from scratch

You will create a simple Kivy "Hello world!" app. We will be using VS Code to demonstrate.

Make a new folder with the name "HelloWorld"

How do I make a new folder in Windows?

File ExplorerVS CodeCommand Prompt

Open File Explorer ( ⊞ Windows key > type "file explorer")
You can right click on an empty space in the folder of your choice and click "New > Folder"

In VS Code, use the default shortcut to bring up a new terminal

£C:\Users\KivySchool\ CTRL + J

Check if the terminal is in the folder you want to create your subfolder
If you need to change directory, the command is cd <folder location>
In your VS Code terminal, type

£C:\Users\KivySchool\ mkdir "KivyProjects"

You can also press ⊞ Windows key, type cmd and enter cd "Your folder location" to a folder of your choice
In your terminal, type

£C:\Users\KivySchool\ mkdir "KivyProjects"

Open VS Code (⊞ Windows key > type VS Code > press Enter), and open the HelloWorld folder (File > Open Folder > HelloWorld). You can use the shortcut CTRL + K followed by CTRL + O to see the Open Folder dialogue option in VS Code.
If VS Code asks you to "trust the authors", click Yes.
Select VS Code and open the terminal with CTRL +J.
Type in VS Code terminal:

£C:\Users\KivySchool\HelloWorld poetry init

What does Poetry ask me?

These are the options Poetry will ask you to define, the only one that matters now is the Python version. If you are asked for author, put whatever you want. Keep pressing Enter until Compatible Python versions appears. For that line, type 3.10.9.

Package name:
Version:
Description:
Author:
License: 
Compatible Python versions:

These options matter if you want to upload a package to PyPI, or to share with other users. Remember to choose Python 3.10.9!

Just keep pressing enter to accept the default values. If you are asked for author, put whatever you want. You can change them later.
For Compatible Python Versions, type 3.10.9. Remember to choose Python 3.10.9!
Once the wizard is finished, you will see a pyproject.toml file in the HelloWorld directory. This is the Poetry configuration file, which contains the project dependencies. This means that any library you install using Poetry will be added to this file. This is super useful because you can share this file with other developers and they will be able to install the same dependencies as you have.

Now we are going to force Poetry to use Python 3.10.9 from Pyenv. First, find the path to Python 3.10.9:

If you haven't installed Python 3.10.9 with Pyenv

To install:

£C:\Users\KivySchool\HelloWorld pyenv install 3.10.9

If that version is not available to you, you can use pyenv install -l -o and pick a recent Python version.

To find the location of Python 3.10.9, type in your VS Code terminal:

£C:\Users\KivySchool\HelloWorld pyenv shell 3.10.9

£C:\Users\KivySchool\HelloWorld pyenv which python

Copy the file location for the next step.
Next, type:

£C:\Users\KivySchool\HelloWorld poetry env use "location of python 3.10.9 from the previous step"

Example

For example:

£C:\Users\KivySchool\HelloWorld poetry env use "C:\Users\KivySchool\.pyenv\pyenv-win\versions\3.10.9\python.exe"

Too many arguments!

If your filepath has spaces, you must use quotes to surround your filepath so that you do not get an error, else you will see:

£C:\Users\KivySchool\HelloWorld Too many arguments to "env use" command, expected arguments "python"

In the example above, the filepath is already surrounded by quotes.

Once the terminal is done, VS Code may ask in the bottom right (if the option has not been set already):
Click yes. This allows VS Code to run your Python files with the right version of Python and running a Python file with the F5 key. You can always run any Python file from within a poetry shell instance of the terminal using python filelocation.py

The specified Python version is not supported by the project.

This means that your pyproject.toml file has a different version requirement than 3.10.9. To fix this, open pyproject.toml and change the line python = under [tool.poetry.dependencies] to python = "3.10.9". Then run poetry env use again. Remember to save the pyproject.toml file!

Then you will see:

£C:\Users\KivySchool\HelloWorld Creating virtualenv helloworld in C:\Users\KivySchool\Desktop\HelloWorld\.venv
Using virtualenv: C:\Users\KivySchool\Desktop\HelloWorld\.venv

Now, we use Poetry to add Kivy to our Python 3.10.9 virtual environment in the "HelloWorld" folder:

£C:\Users\KivySchool\HelloWorld poetry add kivy

This installs Kivy to your virtual environment.
Afterwards, type this to update and install everything to the virtual environment. You might get No dependencies to install or update. That is ok.

£C:\Users\KivySchool\HelloWorld poetry install

Dependency did not install!

Sometimes your dependencies don't install completely. If that is the case, poetry install again. In the worst case, Google is your friend.

Now that the virtual environment is set up, we can enter it using
```
£C:\Users\KivySchool\HelloWorld poetry shell
```

What is a virtual environment?

A virtual environment is used to separate your work on a project from your base operating system. This is so that different Python versions don't conflict, and make it harder for version conflicts to happen. The worst case scenario is that you install everything in your base Windows system. This is a problem because one project might need a dependency like OpenCV and Python 3.7 to work, but in another project a dependency wants Python 3.10. You will get a lot of headaches trying to sort out versions. Instead, separate them in virtual environments away from your operating system to save yourself the trouble.

With Poetry, you type poetry shell in your project's folder so that you interact with Python and the dependencies listed for that project only, NOT the version of Python that is installed in your base OS.

Now that you typed poetry shell, you will see your project on the left side of the terminal:
```
(helloworld-py3.10)
```
That means that you're inside your virtual environment, and can access all the dependencies for the project HelloWorld

How to make a new file in VS Code

Now make a main.py file with these lines. In the left hand side of VS Code, you can right click under the project directory HelloWorld and there will be an option to make a new file.
main.py:

from kivy.app import runTouchApp
from kivy.lang import Builder
kvString = '''
Button:
    text: "Hello world!"
'''
runTouchApp(Builder.load_string(kvString))

Remember to save your file before running!

VS Code Setup

For VS Code, you need to install the Python extensions to debug with F5. You should click "Install" for this then you can run selected Python files by pressing F5 in VS Code.

If you skipped the above dialogue option, you can press F5 while your main.py file is selected. You will be greeted with this dialogue:

Press "Find Python extension"
Download this extension, and at the time of writing it has 79M downloads:

Wait for the install to finish then you can debug Python files with the F5 shortcut while your file is selected in VS Code.

To run the app, you can type in your poetry shell terminal

£C:\Users\KivySchool\HelloWorld python main.py

Or, you can click on main.py in VS Code and press F5.
If VS Code shows this, click to "Debug the currently active Python file"

Hello world!

If you're using Git to upload to Github, now is the time to add .venv and poetry.lock to the .gitignore file. You'll thank yourself later.
Add these lines to .gitignore if you are using git:

.venv
poetry.lock

Linux installation guide

Are you ready to learn more about Kivy? Let's go!