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  • Release – Python 3.9.0b2

    Version: None

    Released: June 9, 2020

    WARNING: this release has a known regression See BPO-40924 for details. Use Python 3.9.0b3 or newer instead, please. This is a beta preview of Python 3.9 Python 3.9 is still in development. This release, 3.9.0b2, is the second of four planned beta release previews. Beta release previews are intended to …

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  • Comparing Python to Other Languages

    ...method. Java, on the other hand, can perform an efficient integer or floating point addition, but requires variable declarations for a and b, and does not allow overloading of the + operator for instances of user-defined classes. For these reasons, Python is much better suited as a "glue" language, while Java is better characterized as a low-level implementation language. In fact, the two together make an excellent combination. Components can be developed in Java and combined to form a...

  • Python Software Foundation: Vendor Policies

    Python Software Foundation: Vendor Policies Introduction Employee vs contractor Purpose Factors Form SS-8 Vendor Definition Invoices Invoice Contents Invoice Example Payment Terms Approval Process OFAC Sanctioned Countries Vendor Tax Documents Tax Withholding Domestic Individuals and Organizations Tax Withholding Form 1099 Foreign Individuals and Organizations Tax Withholding United States-Foreign Country Tax Treaties US Tax Identification Numbers Obtaining a US ITI...

  • Notes

    ...method attempted to close the database properly, but a shutdown race in _Database._commit() could prevent this from working, so that a program trusting __del__() to get the on-disk files in synch could be badly surprised. The race has been repaired. A sync() method was also added so that shelve can guarantee data is written to disk. The close() method can now be called more than once without complaint. The classes in threading.py are now new-style classes. That they weren't before was an ove...

  • Standard Exception Classes in Python 1.5

    ...Definitions The Python class definitions for the standard exceptions are imported from the standard module "exceptions". You can't change this file thinking that the changes will automatically show up in the standard exceptions; the builtin module expects the current hierarchy as defined in exceptions.py. Details on the standard exception classes are available in the Python library reference manual's entry for the exceptions module. Changes to raise The raise statement has b...

  • Parade of the PEPs

    ...methods that return the items or keys in sorted order. The PEP also suffers from lack of definiteness: it proposes a whole slew of alternatives frowm which I guess I am supposed to pick the one I like best. Making me the bad guy again. :-) Finally, the proposed "reversed=<bool>" optional argument seems utterly application-specific. I would like to reject this because it doesn't solve a general enough problem in a general enough way, it just clutters the dictionary API. I'd rath...

  • PyCon Registration Form

    ...method="POST" action="http://www.python.org/cgi-bin/psf/payment.py"> <b>Donation to the Python Software Foundation</b> (optional)<br> <blockquote> <input type="hidden" name="enable" value="Donation"> <table cellpadding="0" border="0" cellspacing="2"> <input type="hidden" name="enable" value="Donation"> <label><tr><td>Amount:&...

  • PyCon Registration Form

    ...method="POST" action="http://www.python.org/cgi-bin/psf/payment.py"> <b>Donation to the Python Software Foundation</b> (optional)<br> <blockquote> <input type="hidden" name="enable" value="Donation"> <table cellpadding="0" border="0" cellspacing="2"> <input type="hidden" name="enable" value="Donation"> <label><tr><td>Amount:&...

  • Summary of "Extension Building" Session

    ...methods. Here's an off-the-cuff illustration of the concept: #!/usr/bin/env python from distutils import Setup class MySetup (Setup): name = 'mydist version_from = 'mymod.py' pyfiles = ['mymod.py', 'othermod.py'] cfiles = ['myext.c'] In this case, it's a bit clearer how to override specific behaviour of all the distutils classes: just subclass and override as needed. Obviously, all of the classes would then have to be w...

  • Python Success Stories

    ...definitions or the initializer structure changed. What I really wanted was code that would analyze the shape and members of the initializer, query the class definitions themselves about their members, and then adjust itself to impedance-match the two sets. This kind of thing is called metaclass hacking and is generally considered fearsomely esoteric -- deep black magic. Most object-oriented languages don't support it at all; in those that do (Perl being one), it tends to be a complicated and fra...

  • PSF Bylaws

    ...methods by which the Working Group will achieve its objectives, the methods of communication to be used by the members of the Working Group, how, what, and when the Working Group will report to the membership and/or the board, and how the Working Group will be managed (including how the chair will be selected). Section 7.4. Responsibilities Subject to the direction of the Board of Directors, the chair of each Working Group shall be primarily responsible for project(s) managed by such group, and ...

  • Python Humor

    ...definitions of an OO Programming Language? From: Tim Peters <@email.msn.com> Date: Sun, 29 Mar 1998 18:19:54 -0500 [jeff <nospam@myhost.com>] > Is it not true that a programming language must > enforce "data hiding" or encapsulation to be > considered a true Object Oriented programming > language? Absolutely! Guido (van Rossum, Python's creator) probably doesn't even know how to spell those phrases, though. > (It is true incase you thought...

  • PSF Board Resolutions

    ...Definition, as established by the Open Source Initiative (see http://www.opensource.org/). Add the following paragraph to the end of the mission statement (after "Encourages and facilitates Python-related research in the public interest."): "Open source" is defined as: freely available technology licensed under terms compatible with Version 1.9 (or later) of the Open Source Definition, as established by the Open Source Initiative (see http://www.opensource.org/). Appro...

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