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Learn Python: Programiz is a free, interactive iOS app that makes it easy to learn to program and write code in Python 3. Move progressively through bit-size lessons step-by-step, experiment with Python code in each lesson, take quizzes and more to learn fundamental concepts of Python programming from beginning to advanced. “python” calls up the Python program. Faceswap.py is the program that Python is going to execute. Convert is one of the functions defined in the faceswap.py file.

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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.

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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.

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:

Recently I started a Python 3 Video tutorial series for beginner to intermediate for Bangla language speaking people. Now I have started to write a series tutorial about Python 3 for everyone. In this post, I will discuss how to setup Python 3, how to run hello world program and some overview.

Python

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Python is an interpreted high level language for general purpose programming. It was initiated by Guido Van Rossum and first released in 1991. It is a duck type language, easy to understand and now very popular in both academic and professional world.

Once the list appears, look for the column headed “64-Bit (Intel),” which will be the fifth column from the left. See all apps that wont work with next macos.

Using Python one can write simple script to web app development. Also in machine learning or in deep learning Python is very popular as it has some outstanding open source libraries.

We have a video tutorial for this chapter for Bangla speaking people:

Setup

Normally in MacOS and Linux Python 2.7+ is commonly distributed with the OS, but in this series tutorial we will work on Python 3.

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To install Python 3, please visit https://www.python.org/downloads/ and download the latest 3.6+ version for your macOS or linux or windows. Then install it in your machine.

Python 3 has a built-in IDLE – Interactive Development Environment installed automatically. If you run it you can see the following window. At the top left you can see the version number installed, here we are seeing Python 3.7

Now write a simple code, and press enter. You’ll see Hello World is printed under the code. Because this is interactive, we can see output immediately after the code interpreted.

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For very simple testing, IDLE is okay. We can also use Python 3 in terminal. If you open your terminal and type just

You’ll see python interactive shell is opened in terminal if it installed successfully. But by default in macOS it is version 2.7+

To open Python 3 shell, write

And now you will see Python 3.7+ shell is running. We can also write code and test here like we did before in IDLE

But we prefer writing code in text editor and then run in terminal. To write Python 3 code we prefer Atom text editor. If you want you can download and install it from here. But you can use any text editor other than Atom

Here you’re seeing an Atom window.

Now Open terminal and go to your code directory where you saved the file named helloworld.py, now write in terminal

This is how we run normal script in terminal. You can see the output printed after the commands:

In our series tutorial we will mostly follow this way. But there is another IDE named PyCharm by JetBrains company which is also very popular. But in my opinion, I think that best suited for big project or web app development.

To install PyCharm, visit the site, download the community version which is free and install. Then open the program, you’ll see the following window, now click File->New Project… Then give a name and create.

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After the HelloWorld project created, create a new file helloworld.py within HelloWorld project and write the following code:

Now run the project, a window will be shown to select project, after you select it you’ll see the following output “Hello World” at the bottom.

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There is some other way, to install python in a system, but here we have shown the common ways. In next chapters, we will discuss more about the language features.

Thank you, for reading my post.

Learn Python On A Mac