Python Usb Library Mac

Aug 28, 2017  Hello, I use CXFreeze in windows and now in Mac OS. I'm in environment python3 and i have an issues without any solution. When i build.exe in my mac it. Jan 09, 2012  If you've developed a USB device-access application to run in a PowerPC-based Macintosh, you probably perform some byte swapping on data you read from the USB bus because the PowerPC processor uses the big-endian format. For example, the USB configuration descriptor structure contains a two-byte field that holds the descriptor length.

Latest version


Python binding for the libusb C library (ctypes/cffi-based libusb).

Project description


Python libusb module is a low-level binding for libusb C library.
It is an effort to allow python programs full access to the API implementedand provided by the well known *libusb* library.
libusb is a lightweight Python package, based on the ctypes library.
It is fully compliant implementation of the original C libusb 1.0 APIby implementing whole its functionality in a clean Python instead of C.
libusb API 1.0 documentation can be found at:
libusb-1.0 API Reference

About original libusb:

Borrowed from the original website:

libusb - A cross-platform user library to access USB devices


libusb is a C library that provides generic access to USB devices.It is intended to be used by developers to facilitate the production ofapplications that communicate with USB hardware.

It is portable: Using a single cross-platform API, it provides accessto USB devices on Linux, OS X, Windows, Android, OpenBSD, etc.

It is user-mode: No special privilege or elevation is required for theapplication to communicate with a device.

It is version-agnostic: All versions of the USB protocol, from 1.0 to 3.1(latest), are supported.

What platforms are supported?

Linux, OS X, Windows, Windows CE, Android, OpenBSD/NetBSD, Haiku.

For additional information, please consult theFAQor theWiki.


  • All necessary things are installed during the normal installation process.
  • ATTENTION: currently works and tested only for Windows.

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  • Python 3.5 or higher
    • 3.7 with C libusb 1.0.22 is a primary test environment.
  • pip and setuptools

To install run:


Visit development page.

Installation from sources:

clone the sources:

and run:

or on development mode:


  • Development is strictly based on tox. To install it run:




  • Adam Karpierz <>


1.0.22b9 (2020-01-17)

  • Added ReadTheDocs config file.
  • Setup update.

1.0.22b8 (2019-11-24)

  • Upgrade for Linux: libusb x64 v.1.0.21 -> v.1.0.22
  • Fix for error when the shared library is configured.
  • Cleanup.

1.0.22b6 (2019-11-23)

  • Initial support for Linux (libusb v.1.0.21 x64).

1.0.22b5 (2019-11-14)

  • Drop support for Python 2.
  • Drop support for Python 3.4.
  • Add support for Python 3.8.
  • Setup update and cleanup.

1.0.22b4 (2019-02-15)

  • Setup improvement.
  • Update required setuptools version.
  • Some updates of examples.

1.0.22b2 (2018-11-08)

  • Setup improvement.
  • Update required setuptools version.

1.0.22b1 (2018-03-30)

  • Upgrade to the libusb v.1.0.22
  • Setup improvement.

1.0.21b4 (2018-02-26)

  • Improve and simplify setup and packaging.

1.0.21b2 (2017-12-18)

  • Fix the error of platform detecting.

1.0.21a3 (2017-08-20)

  • Next alpha release.

0.0.1 (2016-09-23)

  • Initial release.

Release historyRelease notifications

1.0.22b9 pre-release

1.0.22b8 pre-release

1.0.22b5 pre-release

1.0.22b4 pre-release

1.0.22b2 pre-release

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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 ( 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 Python3.8 folder in your Applications folder. In hereyou find IDLE, the development environment that is a standard part of officialPython distributions; PythonLauncher, which handles double-clicking Pythonscripts from the Finder; and the “Build Applet” tool, which allows you topackage Python scripts as standalone applications on your system.

  • 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, 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 (see are good choices, as isTextMate (see Other editors includeGvim ( and Aquamacs(

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.

Python Usb Library Mac Os

With Python 3.8, 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 at

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).

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  • Many packages can also be installed via the setuptools extensionor pip wrapper, see

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

The standard Python GUI toolkit is tkinter, based on the cross-platformTk toolkit ( An Aqua-native version of Tk is bundled with OSX by Apple, and the latest version can be downloaded and installed from; 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

PyQt is another popular cross-platform GUI toolkit that runs natively on MacOS X. More information can be found at

4.5. Distributing Python Applications on the Mac¶

The “Build Applet” tool that is placed in the MacPython 3.6 folder is fine forpackaging small Python scripts on your own machine to run as a standard Macapplication. This tool, however, is not robust enough to distribute Pythonapplications to other users.

The standard tool for deploying standalone Python applications on the Mac ispy2app. More information on installing and using py2app can be foundat

4.6. Other Resources¶

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

Python Usb Device

Another useful resource is the MacPython wiki: