Upgrading to Python3 on your Mac doesn't have to be a daunting task. With this comprehensive guide, you'll learn how to update your Python version, understand the differences between Python2 and Python3, and find out how to coexist with old scripts if needed. So, let's dive in!
Before we get started, it's crucial to understand why you might want to update to Python3. Python3 is faster, more versatile, and supports a more extensive range of data structures. It's also the foundation for future Python development, making it the smarter choice for long-term projects.
Updating Python on Your Mac
The MacOS operating system comes with Python2 pre-installed, but it's essential to update to Python3 for the benefits it brings. Here's how you can do it:
The most straightforward way to update Python on your Mac is using Homebrew, a popular package manager. If you haven't installed Homebrew yet, you can do so by opening your terminal and pasting the following command:
/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
Installing Python3 with Homebrew
![Python Desktop Application Tutorial: Buttons and Events [tkinter 2020]](https://i.pinimg.com/originals/f7/a0/96/f7a096876f3f1188cc7564523abd04b3.jpg)
Once Homebrew is installed, you can install Python3 by typing the following command in your terminal:
brew install python@3.9
Note that you should replace '3.9' with the version you want. The '@' symbol is essential in this command because it specifies that we're installing a specific version of Python.
Verifying the Installation
After installation, verify that Python3 is properly installed by typing:
python3 --version
This should display the installed version of Python3.
Running Python3 Scripts
Now that you have Python3 installed, you might want to know how to run your scripts with the new version. Here's how:
When you run a Python script using the python command, macOS will use the system-installed Python2 by default. To run your script with Python3, you have a few options. One is to use the python3 command instead:
python3 your_script.py
Another way is to add a shebang line at the top of your script, like this:
#!/usr/bin/env python3
print("Hello, World!")
This tells the system to use Python3 to run the script. If you're using a shebang line, make sure to give your script execute permissions with the chmod command:
chmod +x your_script.py
Coexisting with Python2 Scripts
What if you have scripts that still rely on Python2? You can still run them using the python2 command:
python2 your_script.py
Or, you can specify Python2 as the interpreter in your IDE or text editor.
Upgrading Old Scripts to Python3
Eventually, you'll want to upgrade your old scripts to Python3. This can be a straightforward process if you follow the official Python documentation's guidelines for porting your code. You can find it here.
Python3 brings with it several improvements that will make your coding life easier and your scripts more efficient. By following this guide, you're well on your way to taking full advantage of Python3 on your Mac. Happy coding!