Results

• Standard Exception Classes in Python 1.5

  ...print the exception name, e.g. try: 1/0 except: print "Sorry:", sys.exc_type, ":", sys.exc_value With string-based exceptions, this would print something like Sorry: ZeroDivisionError : integer division or modulo With class-based exceptions, it will print Sorry: exceptions.ZeroDivisionError : integer division or modulo The funny exceptions.ZeroDivisionError occurs because when an exception type is a class it is printed as modulename.classnam...

• Debugging Reference Count Problems

  ...print the environment in which the functions are being run to see what's going on... no sooner said than done. And the error disappeared! Take the printing line out -- error reappears (iterate three or four times in disbelief). This is a typical example of Heisenberg's law applied to programs: you can't observe something without influencing it. I'm using: printf(" Env as rule called:\n\t%s\n", PyString_AsString(PyObject_Repr(env))); This creates a new str...

• What is Python? Executive Summary

  ...prints a stack trace. A source level debugger allows inspection of local and global variables, evaluation of arbitrary expressions, setting breakpoints, stepping through the code a line at a time, and so on. The debugger is written in Python itself, testifying to Python's introspective power. On the other hand, often the quickest way to debug a program is to add a few print statements to the source: the fast edit-test-debug cycle makes this simple approach very effective. See also some...

• Unifying types and classes in Python 2.2

  ...print defaultdict # show our type <class '__main__.defaultdict'> >>> print type(defaultdict) # its metatype <type 'type'> >>> a = defaultdict(default=0.0) # create an instance >>> print a # show the instance {} >>> print type(a) # show its type <class '__main__.defaultdict'> >>> print a.__class__ # show its class <class '__main__.defaultdict'> >>> pr...

• Unifying types and classes in Python 2.2

  ...print defaultdict # show our type <class '__main__.defaultdict'> >>> print type(defaultdict) # its metatype <type 'type'> >>> a = defaultdict(default=0.0) # create an instance >>> print a # show the instance {} >>> print type(a) # show its type <class '__main__.defaultdict'> >>> print a.__class__ # show its class <class '__main__.defaultdict'> >>> pr...

• Unifying types and classes in Python 2.2

  ...print defaultdict # show our type <class '__main__.defaultdict'> >>> print type(defaultdict) # its metatype <type 'type'> >>> a = defaultdict(default=0.0) # create an instance >>> print a # show the instance {} >>> print type(a) # show its type <class '__main__.defaultdict'> >>> print a.__class__ # show its class <class '__main__.defaultdict'> >>> pr...

• Unifying types and classes in Python 2.2

  ...print a # show the instance {} >>> print type(a) # show its type <class '__main__.defaultdict'> >>> print a.__class__ # show its class <class '__main__.defaultdict'> >>> print type(a) is a.__class__ # its type is its class 1 >>> a[1] = 3.25 # modify the instance >>> print a # show the new value {1: 3.25} >>> print a[1] # show the new item 3.25 >>> print a...

• PSF Contributor Agreement

  ...print and fill out the form, please use the PDF version. Please print a copy of the PDF, fill out your name, address, and initial license, sign it, and either send via postal mail to: Python Software Foundation c/o Secretary 9450 SW Gemini Dr. ECM# 90772 Beaverton, OR 97008 USA or send it by fax to +1 858 712 8966, or scan or take a photo of the signed form and email it to contributors@python.org.

• Foreword for "Programming Python" (2nd ed.)

  ...print statement: print>>file, a shortcut for printing to a different file object than standard output. Personally, it's the Python 2.0 feature I use most frequently, but most people who opened their mouth about found it an abomination. The discussion thread on the newsgroup berating this simple language extension was one of the longest ever -- apart from the never-ending Python vs. Perl thread. Which brings me to the next topic. (No, not Python vs. Perl. There are better plac...

• Appointment of Proxy for February 24, 2006 member meeting in Dallas, TX

  Appointment of Proxy for February 24, 2006 member meeting in Dallas, TX Appointment of Proxy for February 24, 2006 member meeting in Dallas, TX Designation of Proxy As a member of the Python Software Foundation (PSF), I hereby appoint: ______________________________________________________________ [Print the name of the person you are appointing as your proxy.] as my proxy with full power to vote in accordance with the directions provided here and on all other matters that may come be...

• Python 2.0

  ...Print Statement Easily the most controversial new feature, this extension to the print statement adds an option to make the output go to a different file than the default sys.stdout. For example, to write an error message to sys.stderr, you can now write: print >> sys.stderr, "Error: bad dog!" As a special feature, if the expression used to indicate the file evaluates to None, the current value of sys.stdout is used. Thus: print >> None, "Hello world...

• Metaclasses in Python 1.5

  ...print x.__class__, y.__class__ The print statement shows that x and y are instances of HelperClass1. How did this happen? MySpecialClass is an instance of MetaClass1 (``meta'' is irrelevant here); when an instance is called, its __call__ method is invoked, and presumably the __call__ method defined by MetaClass1 returns an instance of HelperClass1. Now let's see how we could use metaclasses -- what can we do with metaclasses that we can't easily do without them? Here's one idea: ...

• 2013-03-29 PSF Board Meeting Minutes

  ...Printing Assisted with program printing towards the end. Gathered printing for tutorial handouts and coordinated with JP Graphics. Gathering printing for open space cards. Worked on all meter boards and schedules including editing. Had all signage organized for printing by Tricord. PyCon Registration Management I had (and continue to) daily communication with the registration bureau regarding special requests and general questions. PyCon Site Visits Nothing to Report for February ...

• What's new in Python 1.5 and beyond

  ...Printing of recursive dictionaries and lists no longer causes a core dump. A raise statement without arguments re-raises the last exception raised in the current function. The import statement is now serialized between different threads. The finalization order is much more sensible. On Mac and Windows, the case of module file names must match the case as used in the import statement. (On Unix, this was always true, of course.) When you specify the -t option, the tokenizer warns about inconsiste...

• Parade of the PEPs

  ...print i, j I would expect it to print 5 f 6 g 7 h 8 i 9 j while the spec in the PEP would print 5 a 6 b 7 c 8 d 9 e Very confusing. I propose to remove the start/stop arguments, or change the spec to: def iterindexed(sequence, start=0, stop=None): i = start while stop is None or i < stop: try: item = sequence[i] except IndexError: ...

• Release – Python 3.8.16

  Version: None

  Released: Dec. 6, 2022

  This is a security release of Python 3.8 Note: The release you're looking at is Python 3.8.16, a security bugfix release for the legacy 3.8 series. Python 3.11 is now the latest feature release series of Python 3. Get the latest release of 3.11.x here. Security content in this …

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• Release – Python 3.7.16

  Version: None

  Released: Dec. 6, 2022

  This is a security release of Python 3.7 Note: The release you are looking at is a security bugfix release for the legacy 3.7 series which has now reached end-of-life and is no longer supported. See the downloads page for currently supported versions of Python. The final security bugfix release …

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• Slideshow Collections for Instructional Use

  ...printing, filtering and transformation of images, including palette manipulation, pixel filtering and multipage animations. (actual video/screencast)

• Appointment of Proxy for July 24, 2002 member meeting in San Diego, CA

  ...Print the name of the person you are appointing as your proxy.] <br>as my proxy with full power to vote in accordance with the directions provided here and on all other matters that may come before the PSF member meeting to be held in the Marina II room at Sheraton San Diego Hotel and Marina (San Diego, CA) at 8pm on Wednesday July 24. <p><b>Election of Members</b> <p>The following organizations have been nominated as sponsor members of the PSF. <p>AB Strakt &...

• Python Patterns - An Optimization Anecdote

  ...print f.__name__, r = range(n) t1 = time.clock() for i in r: f(a); f(a); f(a); f(a); f(a); f(a); f(a); f(a); f(a); f(a) t2 = time.clock() print round(t2-t1, 3) Epilogue A few days later, my friend was back with the question: how do you do the reverse operation? I.e. create a list of integer ASCII values from a string. Oh no, here we go again, it flashed through my mind... But this time, it was relatively painless. There...

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