PySide

<h2 id="history">History</h2>
By 2009, <a href="/facts/Nokia/bCleFoF4">Nokia</a>, the then owners of the Qt toolkit, wanted Python binding available under the <a href="/facts/GNU_Lesser_General_Public_License/AXwkz9x3">LGPL</a> license. Nokia failed to reach an agreement with Riverbank Computing, the developers of the <a href="/facts/PyQt/n8x1XTxb">PyQt</a> Python binding.<a class="footnote-ref" id="fnref:4" href="#fn:4">4</a> In August, Nokia released PySide. It provided similar functionality, but under the LGPL.<a class="footnote-ref" id="fnref:5" href="#fn:5">5</a><a class="footnote-ref" id="fnref:6" href="#fn:6">6</a> 'Side' is Finnish for binding.<a class="footnote-ref" id="fnref:7" href="#fn:7">7</a>
There have been three major versions of PySide:<a class="footnote-ref" id="fnref:8" href="#fn:8">8</a>

<ul><li>PySide supports Qt 4</li>
<li>PySide2 supports Qt 5</li>
<li>PySide6 supports Qt 6</li></ul>
PySide version 1 was released in August 2009 under the <a href="/facts/GNU_Lesser_General_Public_License/AXwkz9x3">LGPL</a> by <a href="/facts/Nokia/bCleFoF4">Nokia</a>,<a class="footnote-ref" id="fnref:9" href="#fn:9">9</a> then the owner of the Qt toolkit, after it failed to reach an agreement with <a href="/facts/PyQt/n8x1XTxb">PyQt</a> developers Riverbank Computing<a class="footnote-ref" id="fnref:10" href="#fn:10">10</a> to change its licensing terms to include <a href="/facts/GNU_Lesser_General_Public_License/AXwkz9x3">LGPL</a> as an alternative license. It supported Qt 4 under the operating systems Linux/X11, Mac OS X, Microsoft Windows, <a href="/facts/Maemo/gQyp5ehf">Maemo</a> and <a href="/facts/MeeGo/3P3HSE8K">MeeGo</a>,<a class="footnote-ref" id="fnref:11" href="#fn:11">11</a> while the PySide community added support for <a href="/facts/Android_(operating_system)/nNyHb0xz">Android</a>.<a class="footnote-ref" id="fnref:12" href="#fn:12">12</a>
PySide2 was started by Christian Tismer to port PySide from Qt 4 to Qt 5 in 2015.<a class="footnote-ref" id="fnref:13" href="#fn:13">13</a> The project was then folded into the Qt Project.<a class="footnote-ref" id="fnref:14" href="#fn:14">14</a> It was released in December 2018.<a class="footnote-ref" id="fnref:15" href="#fn:15">15</a>
PySide6 was released in December 2020. It added support for Qt 6 and removed support for all Python versions older than 3.6.<a class="footnote-ref" id="fnref:16" href="#fn:16">16</a>
The project started out using Boost. Python from the <a href="/facts/Boost_(C%252B%252B_libraries)/vGLGG51A">Boost C++ libraries</a> for the bindings. It later created its own binding generator named Shiboken,<a class="footnote-ref" id="fnref:17" href="#fn:17">17</a> to reduce the size of the binaries and the <a href="/facts/Memory_footprint/wnS6TgpY">memory footprint</a>.<a class="footnote-ref" id="fnref:18" href="#fn:18">18</a>[when?]

<h2 id="hello-world-example">"Hello, World!" example</h2>
import sys
from PySide6 import QtCore, QtWidgets

# Create a Qt application
app = QtWidgets.QApplication(sys.argv)

# Create a Qt window
main_window = QtWidgets.QWidget()
main_window.resize(320, 240)
main_window.setWindowTitle("'Hello, world!' example")

# Create text in the window
label = QtWidgets.QLabel(main_window)
label.setText("Hello, world!")
label.setGeometry(QtCore.QRect(200, 200, 200, 200))

# Show the window
main_window.show()

# Enter the Qt main loop and exit when done
sys.exit(app.exec())

<h2 id="see-also">See also</h2>
<ul>
<li>Free and open-source software portal</li></ul>
<ul><li><a href="/facts/PyQt/n8x1XTxb">PyQt</a></li>
<li><a href="/facts/PyGTK/6kJhjDoJ">PyGTK</a></li>
<li><a href="/facts/WxPython/sTdK8guC">wxPython</a></li></ul>

<h2 id="external-links">External links</h2>
<ul><li><a href="https://www.qt.io/qt-for-python">Official website</a></li>
<li><a href="https://doc.qt.io/qtforpython/">Official Documentation</a> on the Qt Documentation web site</li>
<li><a href="https://wiki.qt.io/Qt_for_Python">Qt for Python</a> on the Qt wiki</li>
<li><a href="https://wiki.qt.io/Differences_Between_PySide_and_PyQt">Differences Between PySide and PyQt</a> on the Qt wiki</li></ul>

<h2 id="references">References</h2>

<ol>
<li id="fn:1">"Qt for Python Cross compilation". Qt. The Qt Company. April 13, 2022. <a href="https://doc.qt.io/qtforpython-6/gettingstarted/index.html#cross-compilation" target="_blank">https://doc.qt.io/qtforpython-6/gettingstarted/index.html#cross-compilation</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></li>
<li id="fn:2">"Qt for Python details on the new 6.3 release". Qt. The Qt Company. April 13, 2022. <a href="https://www.qt.io/blog/qt-for-python-details-on-the-new-6.3-release" target="_blank">https://www.qt.io/blog/qt-for-python-details-on-the-new-6.3-release</a> <a href="#fnref:2" class="footnote-back-ref">↩</a></li>
<li id="fn:3">"Taking Qt for Python to Android". Qt. The Qt Company. April 13, 2022. <a href="https://www.qt.io/blog/taking-qt-for-python-to-android" target="_blank">https://www.qt.io/blog/taking-qt-for-python-to-android</a> <a href="#fnref:3" class="footnote-back-ref">↩</a></li>
<li id="fn:4">faq, Martin Fitzpatrick Last updated (2019-06-21). "PyQt5 vs PySide2: What's the difference between the two Python Qt libraries?". Python GUIs. Retrieved 2022-06-25. <a href="https://www.pythonguis.com/faq/pyqt5-vs-pyside2/" target="_blank">https://www.pythonguis.com/faq/pyqt5-vs-pyside2/</a> <a href="#fnref:4" class="footnote-back-ref">↩</a></li>
<li id="fn:5">"FAQ – PySide – Python for Qt". Pyside.org. Archived from the original on 2012-01-11. Retrieved 2009-09-03. <a href="https://web.archive.org/web/20120111134407/http://www.pyside.org/faq/" target="_blank">https://web.archive.org/web/20120111134407/http://www.pyside.org/faq/</a> <a href="#fnref:5" class="footnote-back-ref">↩</a></li>
<li id="fn:6">"PySide has been released – PySide – Python for Qt". Pyside.org. 2009-08-18. Archived from the original on 2009-10-25. Retrieved 2009-09-03. <a href="https://web.archive.org/web/20091025170910/http://www.pyside.org/2009/08/pyside-has-been-released/" target="_blank">https://web.archive.org/web/20091025170910/http://www.pyside.org/2009/08/pyside-has-been-released/</a> <a href="#fnref:6" class="footnote-back-ref">↩</a></li>
<li id="fn:7">faq, Martin Fitzpatrick Last updated (2019-06-21). "PyQt5 vs PySide2: What's the difference between the two Python Qt libraries?". Python GUIs. Retrieved 2022-06-25. <a href="https://www.pythonguis.com/faq/pyqt5-vs-pyside2/" target="_blank">https://www.pythonguis.com/faq/pyqt5-vs-pyside2/</a> <a href="#fnref:7" class="footnote-back-ref">↩</a></li>
<li id="fn:8">Maureira-Fredes, Cristián (December 10, 2020). "Qt for Python 6 released". Qt. The Qt Company. <a href="https://www.qt.io/blog/qt-for-python-6-released" target="_blank">https://www.qt.io/blog/qt-for-python-6-released</a> <a href="#fnref:8" class="footnote-back-ref">↩</a></li>
<li id="fn:9">"PySide has been released". PySide – Python for Qt. August 18, 2009. Archived from the original on October 25, 2009. <a href="https://web.archive.org/web/20091025170910/http://www.pyside.org/2009/08/pyside-has-been-released/" target="_blank">https://web.archive.org/web/20091025170910/http://www.pyside.org/2009/08/pyside-has-been-released/</a> <a href="#fnref:9" class="footnote-back-ref">↩</a></li>
<li id="fn:10">"PySide FAQ". Qt Wiki. July 31, 2017. Archived from the original on August 6, 2020. Retrieved February 24, 2021. <a href="https://web.archive.org/web/20200806174411/https://wiki.qt.io/PySide_FAQ" target="_blank">https://web.archive.org/web/20200806174411/https://wiki.qt.io/PySide_FAQ</a> <a href="#fnref:10" class="footnote-back-ref">↩</a></li>
<li id="fn:11">"PySide Downloads". Qt Wiki. February 16, 2018. Retrieved February 24, 2021. <a href="https://wiki.qt.io/PySide_Downloads" target="_blank">https://wiki.qt.io/PySide_Downloads</a> <a href="#fnref:11" class="footnote-back-ref">↩</a></li>
<li id="fn:12">"PySide for Android guide". Qt Wiki. February 26, 2018. Retrieved February 24, 2021. <a href="https://wiki.qt.io/PySide_for_Android_guide" target="_blank">https://wiki.qt.io/PySide_for_Android_guide</a> <a href="#fnref:12" class="footnote-back-ref">↩</a></li>
<li id="fn:13">"Qt for Python". Qt Wiki. December 16, 2020. Retrieved February 24, 2021. <a href="https://wiki.qt.io/Qt_for_Python" target="_blank">https://wiki.qt.io/Qt_for_Python</a> <a href="#fnref:13" class="footnote-back-ref">↩</a></li>
<li id="fn:14">Knoll, Lars; Tismer, Christian (April 11, 2016). "Bringing pyside back to Qt Project". pyside-dev Google Group. Retrieved February 24, 2021. <a href="https://groups.google.com/g/pyside-dev/c/pqwzngAGLWE/m/kXUpXBhILAAJ" target="_blank">https://groups.google.com/g/pyside-dev/c/pqwzngAGLWE/m/kXUpXBhILAAJ</a> <a href="#fnref:14" class="footnote-back-ref">↩</a></li>
<li id="fn:15">"Qt for Python". Qt Wiki. December 16, 2020. Retrieved February 24, 2021. <a href="https://wiki.qt.io/Qt_for_Python" target="_blank">https://wiki.qt.io/Qt_for_Python</a> <a href="#fnref:15" class="footnote-back-ref">↩</a></li>
<li id="fn:16">Maureira-Fredes, Cristián (December 10, 2020). "Qt for Python 6 released". Qt. The Qt Company. <a href="https://www.qt.io/blog/qt-for-python-6-released" target="_blank">https://www.qt.io/blog/qt-for-python-6-released</a> <a href="#fnref:16" class="footnote-back-ref">↩</a></li>
<li id="fn:17">"Shiboken". Qt Documentation. The Qt Company. Retrieved February 24, 2021. <a href="https://doc.qt.io/qtforpython/shiboken6/" target="_blank">https://doc.qt.io/qtforpython/shiboken6/</a> <a href="#fnref:17" class="footnote-back-ref">↩</a></li>
<li id="fn:18">"PySide Shiboken FAQ". Qt Wiki. June 5, 2016. Retrieved February 24, 2021. <a href="https://wiki.qt.io/PySide_Shiboken_FAQ" target="_blank">https://wiki.qt.io/PySide_Shiboken_FAQ</a> <a href="#fnref:18" class="footnote-back-ref">↩</a></li>
</ol>

PySide open-in-new

PySide