OS X (Mavericks) has Python 2.7 stock installed. But I do all my own personal Python stuff with 3.3. I just flushed my 3.3.2 install and installed the new 3.3.3. So I need to install pyserial again. Run the Python installer package and install Python 3 onto the Mac Python 3.7.x requires about 100mb of disk space to install. Installation is quick, and you’ll have Python 3.x alongside Python 2.x on the Mac. Once Python 3 is installed you will find a Python3 folder within the /Applications directory of your Mac.
This short tutorial will show you how to properly install Python 3 on a Mac OS X computer. There are multiple ways to install Python 3, including a download from the official Python site, however I strongly recommend instead using a package manager like Homebrew to manage all your dependencies going forward. It will make your life a lot simpler.
Confirm your Python version
Although Python 2 is installed by default on Apple computers, Python 3 is not. You can confirm this by typing in Terminal
python --version
and hitting Enter:To check if Python 3 is already installed try running the command
python3 --version
. Most likely you’ll see an error message, but it’s worth checking. Even if you have a version of Python 3, we want to be on the most recent release, which is 3.7.4 at this point in 2019.Install Xcode and Homebrew
Streamlabs for mac. We will use the package manager Homebrew to install Python 3. Homebrew depends on Apple’s Xcode package, so run the following command to install it:
Click through all the confirmation commands (Xcode is a large program so this might take a while to install depending on your internet connection).
Next, install Homebrew: https://petvnt.weebly.com/hp-print-and-scan-doctor-for-mac.html.
Note: You can also find this command on the homepage of the Homebrew website. It’s easiest to copy and paste since it’s a long command.
To confirm Homebrew installed correctly, run this command:
Install Python 3
To install the latest version of Python, run the following command:
Now let’s confirm which version was installed:
To open a Python 3 shell from the command line type python3:
How To Install Python 3 For Mac
When you want to exit, type
exit()
and then Return or Ctrl-D
(the Control and D key at the same time).Note you can still run Python shells with Python 2 by simply typing
python
:Bonus: Virtual Environments
By default, Python packages are installed globally on your computer in a single directory. Which can cause major problems when working on multiple Python projects!
For example, image you have Project A that relies upon Django 1.11 whereas Project B uses Django 2.2. If you naively installed Django on your computer, only the latest install would be present and available in that single directory. Then consider that most Python projects rely on multiple packages that each have their own version numbers. There’s simply no way to keep everything straight and not inadvertently break things with the wrong package versions.
The solution is to use a virtual environment for each project, an isolated directory, rather than installing Python packages globally.
Halo for mac. Confusingly, there are multiple tools for virtual environments in Python:
- venv is available by default on Python 3.3+
- virtualenv must be installed separately but supports Python 2.7+ and Python 3.3+
- Pipenv is a higher-level tool that automatically manages a separate virtual environment for each project
On MacOS we can install Pipenv with HomeBrew. Twitch download mac.
Then use Pipenv for any Python packages you wish to install. Musiclab realguitar vst. For example, if you want to work with Django 2.2.6, first create a dedicated directory for it on your computer such as in a django directory on your Desktop. Teamviewer full control mac.
Adobe flash cs4 mac download. Then install Django within that directory.
If you look within the directory there are now two new files,
Pipfile
and Pipfile.lock
, which Pipenv uses. To activate the virtual environment type pipenv shell
.There will now be parentheses around the name of your current directory which indicates the virtual environment is activate. To exit the virtual environment, type exit.
The lack of parentheses confirms the virtual environment is no longer active.
Want to improve your Python? I have a list of recommended Python books.
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