Xcode catalina5/21/2023 To exit the Python 3 interactive shell, you can type either exit() and then Return or type Control+d which means hold both the Control and D keys at the same time. Type "help", "copyright", "credits" or "license" for more information. To confirm which version of Python 3 was installed, run the following command in Terminal: % python3 -versionįinally, to run our new version of Python 3 open an interactive shall by typing python3 within Terminal: % python3 Type the following command into Terminal and press Enter: % brew install python3 Now we can install the latest version of Python 3. To confirm Homebrew installed correctly, run this command: % brew doctor Next install Homebrew by copy/pasting the following command into Terminal and then type Enter: % ruby -e "$(curl -fsSL )" Make sure to click through all the confirmation prompts XCode requires. It is a large program so this make take a while to download. In your Terminal app, run the following command to install XCode and its command-line tools: % xcode-select -install The first step for Python 3 is to install Apple’s Xcode program which is necessary for iOS development as well as most programming tasks. To check, however most likely this will throw an error. It’s possible that Python 3 may have already been installed as python3. In short: don’t type % before your commands! Any output, such as Python 2.7.17 in this case, does not have a dollar sign in front. Everything after is intended to be typed by the user followed by the Enter key. Note: The percent sign, (%), indicates user input. Double-click Terminal.įollowed by the Enter key to see the currently installed version of Python. Check Python versionīefore we start, make sure Python 3 isn’t already installed on your computer. A better approach, in my opinion, is to instead use the popular package manager Homebrew which automates updates and juggling multiple versions of Python on a computer. The official Python website even recommends downloading it directly, however this approach can cause confusion around PATH variables, updates, and uninstalls. There are multiple ways to install Python 3 on a MacOS computer. And since Python 2 will no longer be officially supported as of January 1, 2020, you should really use Python 3 instead. Historically MacOS came preinstalled with Python 2, however starting with macOS Catalina 10.15 (released in October 2019) this is no longer the case. Time to take a deeper look at this upgrade of Pyton to Python 3 and how to solve the problems that come with it. More details about Python 2 support in pip, can be found at A future version of pip will drop supportįor Python 2.7. Python as Python 2.7 won't be maintained after that date. the message I saw in my terminal was: DEPRECATION: Python 2.7 will reach the end of its life on January 1st, 2020. The first time I read it I thought I will fix it when I need to. When I reinstalled my iMac with macOS Catalina in January 2020 I stubbled upon a error that I had seen before but I convenience ignored every time it popped-up.
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