Psf License Agreement For Python
Guido van Rossum, the creator of Python, was awarded the 2001 Free Software Foundation award for the Advancement of Free Software for changing the license to address this incompatibility. Python Software Foundation License (PSFL) is a BSD-style free software license that is compatible with the GNU General Public License (GPL).  Its main use is the distribution of The Python project software. Unlike the GPL, the Python license is not a copyleft license and allows the distribution of modified versions without a source code. The PSFL is allowed on both the FSF`s list of licenses and the list of approved OSI licenses. In 2000, Python was briefly available under the Python license, which is not compatible with THE GPL. The reason for this incompatibility by the Free Software Foundation was that "this Python license is subject to the laws of the State of Virginia in the United States," which the GPL does not allow.  Starting with Python 3.8.6, examples, recipes and other codes are doubly conceded in the documentation under the PSF license agreement and the Zero-Clause BSD license. Some software built into Python is under different licenses. Licenses are listed with the code that falls under this license.
You will find an incomplete list of these licenses in licenses and confirmations for incorporated Software. The C14N 2.0 test collection in the test pack (Lib/test/xmltestdata/c14n-20/) was viewed on the W3C website on www.w3.org/TR/xml-c14n2-testcases/ and distributed under the 3-Clause BSD license: this section is an incomplete but growing list of licenses and confirmations for third-party software built into the Python distribution. LPG Compatible does not mean that we distribute Python under the GPL. With all Python licenses, unlike GPL, you can distribute a modified version without making your changes open source. GPL-compatible licenses combine Python with other software published under the GPL; not the others. In May 2000, Guido and The Python development team moved to BeOpen.com to form the BeOpen PythonLabs team. In October of the same year, the PythonLabs team joined Digital Creations (now Zope Corporation; see www.zope.org/). In 2001, the Python Software Foundation (PSF, see www.python.org/psf/) was established, a non-profit organization created specifically for Python-related intellectual property.
Zope Corporation is a promotional member of the PSF. Hashlib, posix, ssl, crypt modules use the OpenSSL library for additional performance when provided by the operating system. In addition, Windows and Mac OS X installers for Python may contain a copy of OpenSSL libraries, which is why we are adding a copy of the OpenSSL license here: Binary redistributions must reproduce the original copyright indication, this list of conditions, and the subsequent disclaimer in documentation and/or other materials provided with distribution.