12/28/2021

Python Mac Installer

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  • Doing it Right¶. Let’s install a real version of Python. Before installing Python, you’ll need to install a C compiler. The fastest way is to install the Xcode Command Line Tools by running xcode-select-install.
  • For most Unix systems, you must download and compile the source code. The same source code archive can also be used to build the Windows and Mac versions, and is the starting point for ports to all other platforms. Download the latest Python 3 and Python 2 source.

Introduction¶

In Python 2.0, the distutils API was first added to the standard library.This provided Linux distro maintainers with a standard way of convertingPython projects into Linux distro packages, and system administrators with astandard way of installing them directly onto target systems.

In the many years since Python 2.0 was released, tightly coupling the buildsystem and package installer to the language runtime release cycle has turnedout to be problematic, and it is now recommended that projects use thepip package installer and the setuptools build system, rather thanusing distutils directly.

See Installing Python Modules and Distributing Python Modules for more details.

One option is to use Homebrew to install the latest Python release. Another option is to use the official Python packages and that’s the approach we’ll follow. Go to choose the Downloads menu, hover “Mac OS X” and a panel with a link to download the official package will appear: Click that, and run the installer. Python distributions are available from Anaconda, the Python Software Foundation, JetBrains (PyCharm), and others. This tutorial shows how to install Python. And I remembered that osx has an builtin version of python. I tried using type -a python and the result returned. Python is /usr/bin/python python is /usr/local/bin/python However running both python at these locations give me GCC 4.2.1 (Apple Inc. Build 5646) on darwin. Do they both refer to the same builtin python mac provided?

How to downgrade the Python Version from 3.8 to 3.7 on windows? Downgrade python version from 3.8 to lower one in a given conda environment; Option 5. What follows isn't a downgrade in the classical sense - though for the sake of completeness I decided to mention this approach as well. Install¶ The easiest method for installing Py-ART is to use the conda packages from the latest release and use Python 3, as Python 2 support ended January 1st, 2020 and many packages including Py-ART no longer support Python 2. To do this you must download and install Anaconda or Miniconda. With Anaconda or Miniconda install, it is recommended. Click to see our best Video content. Take A Sneak Peak At The Movies Coming Out This Week (8/12) Iconic quotes from the cast of The Office. We recommend that you install a 32-bit version of Python and that you install Python in its default location (for example, C: Python27). Download gsutil. Gsutil is bundled in a single archive named gsutil.zip.

This legacy documentation is being retained only until we’re confident that thesetuptools documentation covers everything needed.

Install Python 3.8 Mac Terminal Commands

Distutils based source distributions¶

If you download a module source distribution, you can tell pretty quickly if itwas packaged and distributed in the standard way, i.e. using the Distutils.First, the distribution’s name and version number will be featured prominentlyin the name of the downloaded archive, e.g. foo-1.0.tar.gz orwidget-0.9.7.zip. Next, the archive will unpack into a similarly-nameddirectory: foo-1.0 or widget-0.9.7. Additionally, thedistribution will contain a setup script setup.py, and a file namedREADME.txt or possibly just README, which should explain thatbuilding and installing the module distribution is a simple matter of runningone command from a terminal:

For Windows, this command should be run from a command prompt window(Start ‣ Accessories):

If all these things are true, then you already know how to build and install themodules you’ve just downloaded: Run the command above. Unless you need toinstall things in a non-standard way or customize the build process, you don’treally need this manual. Or rather, the above command is everything you need toget out of this manual.

Author

Bob Savage <bobsavage@mac.com>

Python on a Macintosh running Mac OS X is in principle very similar to Python onany other Unix platform, but there are a number of additional features such asthe IDE and the Package Manager that are worth pointing out.

4.1. Getting and Installing MacPython¶

Mac OS X 10.8 comes with Python 2.7 pre-installed by Apple. If you wish, youare invited to install the most recent version of Python 3 from the Pythonwebsite (https://www.python.org). A current “universal binary” build of Python,which runs natively on the Mac’s new Intel and legacy PPC CPU’s, is availablethere.

What you get after installing is a number of things:

  • A Python3.9 folder in your Applications folder. In hereyou find IDLE, the development environment that is a standard part of officialPython distributions; and PythonLauncher, which handles double-clicking Pythonscripts from the Finder.

  • A framework /Library/Frameworks/Python.framework, which includes thePython executable and libraries. The installer adds this location to your shellpath. To uninstall MacPython, you can simply remove these three things. Asymlink to the Python executable is placed in /usr/local/bin/.

The Apple-provided build of Python is installed in/System/Library/Frameworks/Python.framework and /usr/bin/python,respectively. You should never modify or delete these, as they areApple-controlled and are used by Apple- or third-party software. Remember thatif you choose to install a newer Python version from python.org, you will havetwo different but functional Python installations on your computer, so it willbe important that your paths and usages are consistent with what you want to do.

IDLE includes a help menu that allows you to access Python documentation. If youare completely new to Python you should start reading the tutorial introductionin that document.

If you are familiar with Python on other Unix platforms you should read thesection on running Python scripts from the Unix shell.

4.1.1. How to run a Python script¶

Your best way to get started with Python on Mac OS X is through the IDLEintegrated development environment, see section The IDE and use the Help menuwhen the IDE is running.

If you want to run Python scripts from the Terminal window command line or fromthe Finder you first need an editor to create your script. Mac OS X comes with anumber of standard Unix command line editors, vim andemacs among them. If you want a more Mac-like editor,BBEdit or TextWrangler from Bare Bones Software (seehttp://www.barebones.com/products/bbedit/index.html) are good choices, as isTextMate (see https://macromates.com/). Other editors includeGvim (http://macvim-dev.github.io/macvim/) and Aquamacs(http://aquamacs.org/).

To run your script from the Terminal window you must make sure that/usr/local/bin is in your shell search path.

To run your script from the Finder you have two options:

  • Drag it to PythonLauncher

  • Select PythonLauncher as the default application to open yourscript (or any .py script) through the finder Info window and double-click it.PythonLauncher has various preferences to control how your script islaunched. Option-dragging allows you to change these for one invocation, or useits Preferences menu to change things globally.

4.1.2. Running scripts with a GUI¶

With older versions of Python, there is one Mac OS X quirk that you need to beaware of: programs that talk to the Aqua window manager (in other words,anything that has a GUI) need to be run in a special way. Use pythonwinstead of python to start such scripts.

With Python 3.9, you can use either python or pythonw.

4.1.3. Configuration¶

Python on OS X honors all standard Unix environment variables such asPYTHONPATH, but setting these variables for programs started from theFinder is non-standard as the Finder does not read your .profile or.cshrc at startup. You need to create a file~/.MacOSX/environment.plist. See Apple’s Technical Document QA1067 fordetails.

For more information on installation Python packages in MacPython, see sectionInstalling Additional Python Packages.

4.2. The IDE¶

MacPython ships with the standard IDLE development environment. A goodintroduction to using IDLE can be found athttp://www.hashcollision.org/hkn/python/idle_intro/index.html.

Install Python 3 Mac Terminal

Python Mac Installer

4.3. Installing Additional Python Packages¶

There are several methods to install additional Python packages:

  • Packages can be installed via the standard Python distutils mode (pythonsetup.pyinstall).

  • Many packages can also be installed via the setuptools extensionor pip wrapper, see https://pip.pypa.io/.

4.4. GUI Programming on the Mac¶

There are several options for building GUI applications on the Mac with Python.

PyObjC is a Python binding to Apple’s Objective-C/Cocoa framework, which isthe foundation of most modern Mac development. Information on PyObjC isavailable from https://pypi.org/project/pyobjc/.

The standard Python GUI toolkit is tkinter, based on the cross-platformTk toolkit (https://www.tcl.tk). An Aqua-native version of Tk is bundled with OSX by Apple, and the latest version can be downloaded and installed fromhttps://www.activestate.com; it can also be built from source.

wxPython is another popular cross-platform GUI toolkit that runs natively onMac OS X. Packages and documentation are available from https://www.wxpython.org.

PyQt is another popular cross-platform GUI toolkit that runs natively on MacOS X. More information can be found athttps://riverbankcomputing.com/software/pyqt/intro.

4.5. Distributing Python Applications on the Mac¶

The standard tool for deploying standalone Python applications on the Mac ispy2app. More information on installing and using py2app can be foundat http://undefined.org/python/#py2app.

4.6. Other Resources¶

The MacPython mailing list is an excellent support resource for Python users anddevelopers on the Mac:

Another useful resource is the MacPython wiki:

Tutorials
This tutorial will demonstrate how you can install Anaconda, a powerful package manager, on your Mac.

Anaconda is a package manager, an environment manager, and Python distribution that contains a collection of many open source packages. An installation of Anaconda comes with many packages such as numpy, scikit-learn, scipy, and pandas preinstalled and is also the recommended way to install Jupyter Notebooks. This tutorial will include:

With that, let’s get started

Graphical Installation of Anaconda

Installing Anaconda using a graphical installer is probably the easiest way to install Anaconda.

1 ‒ Go to the Anaconda Website and choose a Python 3.x graphical installer (A) or a Python 2.x graphical installer (B). If you aren’t sure which Python version you want to install, choose Python 3. Do not choose both.

2 - Locate your download and double click it.

3 - Click on Continue

4 - Click on Continue

5 - Note that when you install Anaconda, it modifies your bash profile with either anaconda3 or anaconda2 depending on what Python version you choose. This can important for later. Click on Continue.

6 - Click on Continue to get the License Agreement to appear.

You will need to read and click Agree to the license agreement before clicking on Continue again.

7 - Click on Install

8 - You’ll be prompted to give your password, which is usually the one that you also use to unlock your Mac when you start it up. After you enter your password, click on Install Software.

9 - Click on Continue. You can install Microsoft Visual Studio Code if you like, but it is not required. It is an Integrated Development Environment. You can learn about Python Integrated Development Environments here.

10 - You should get a screen saying the installation has completed. Close the installer and move it to the trash.

Test your Installation

1 - Open a new terminal on your Mac. You can do this by clicking on the Spotlight magnifying glass at the top right of the screen, type “terminal” then click on the terminal icon. Now, type the following command into your terminal

If you had chosen a Python 3 version of Anaconda (like the one in the image above), you will get an output similar to above.

If you had chosen a Python 2 version of Anaconda, you should get a similar output to the one below.

2 - Another good way to test your installation is to try and open a Jupyter Notebook. You can type the command below in your terminal to open a Jupyter Notebook. If the command fails, chances are that Anaconda isn’t in your path. See the next section on Common Issues.

The image below shows a Jupyter Notebook in action. Jupyter notebooks contain both code and rich text elements, such as figures, links, and equations. You can learn more about Jupyter Notebooks here.

Common Issues

The image below shows step 5 of the Graphical Installation of Anaconda from earlier in this tutorial. Notice that when you install Anaconda, it modifies your .bash_profile to put Anaconda in your path.

The problem is that sometimes people have installed multiple different versions of Anaconda and consequently they have multiple versions of Anaconda in their path. For example, say a person needs Python 2 and they install a Python 2 version of Anaconda, That same person then finds that they need Python 3, so they install a Python 3 version of Anaconda. The problem is that you really only need 1 version of Anaconda. A lot of people think that is that if you install a Python 2 version of Anaconda, you are stuck with Python 2. Anaconda is also an environment manager and makes it very easy to go back and forth between Python 2 and 3 on a single installation of Anaconda (learn more here).

To see if you have more than 1 version of anaconda installed and to fix it if you do, let’s first look at your .bash_profile.

1 - Open a new terminal and go to your home directory. You can do this by using the command below.

2 - Use the cat command to see the contents of the hidden file .bash_profile. Type the following command into your terminal.

You should only see one anaconda version added to your path as you see below, this isn’t a problem for you. Move to the conclusion of the tutorial.

If you see more than one Anaconda version, proceed to step 3.

Python Mac Installer Windows 10

3 - To remove the old version of Anaconda from your .bash_profile use the command below to edit the file using the nano editor.

From the image above, notice there is a newer Version of Anaconda. Simply remove the older version of Anaconda. Type control + X to exit out of nano.

Python Mac Installer Pc

Save changes by typing Y.

Close that terminal and open a new one. You should be okay now. Keep in mind that this isn’t the only issue you can have when installing Anaconda, but it is a very common issue.

Python Macos Universal2 Installer

Python

Python

Conclusion

This tutorial provided a quick guide to install Anaconda on Mac as well as dealing with a common installation issue. A graphical install of Anaconda isn’t the only way to install Anaconda as you can Install Anaconda by a Command Line Installer, but it is the easiest. If you aren’t sure what to do after installing Anaconda, here are a few things you can do:

Python Mac Installer Windows 10

  • If you would like to learn more about Anaconda, you can learn about more here.
  • If you want to start coding on your local computer, you can check out the the Jupyter Notebook Definitive Guide to learn how to code in Jupyter Notebooks.
  • If you want to learn Python, you can check out DataCamp's Intro to Python for Data Science course.

If you any questions or thoughts on the tutorial, feel free to reach out in the comments below or through Twitter.

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