🌐 Mailman 3 December 2011 - Tutor - python.org

Wave module
by Alex Krycek Feb. 12, 2015

Feb. 12, 2015

Hello, I'm trying to join two .wav files with the wave module. But when I try to use wave.open(filename, "rb") I receive the following error: Traceback (most recent call last): File "<stdin>", line 1, in <module> File "F:\PortablePython1.0\lib\wave.py", line 483, in open return Wave_read(f) File "F:\PortablePython1.0\lib\wave.py", line 162, in __init__ self.initfp(f) File "F:\PortablePython1.0\lib\wave.py", line 143, in initfp self._read_fmt_chunk(chunk) File "F:\PortablePython1.0\lib\wave.py", line 264, in _read_fmt_chunk raise Error, 'unknown format: %r' % (wFormatTag,) wave.Error: unknown format: 85 I read somewhere that there are various wave formats, only some supported by Python. Is this true? If so, is there any way I can convert my wave files into a supported kind? Thanks!

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unicode help
by Marilyn Davis Nov. 14, 2012

Nov. 14, 2012

Hi, I'm still on Python 2.6 and I'm trying to work some unicode handling. I've spent some hours on this snippet of code, trying to follow PEP 0263, since the error tells me to see it. I've tried other docs too and I am still clueless. The code works, except for the comment at the end. I would be very grateful for some help. #!/usr/bin/env python '''Unicode handling for 2.6. ''' class Currency(float): def __str__(self): value = self.__class__.symbol + float.__str__(self) return value class Yen(Currency): symbol = unichr(165) class Pound(Currency): symbol = unichr(163) def main(): y = Yen(100) print unicode(y) p = Pound(100) print unicode(p) main() """ ¥100.0 £100.0 """

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PYTHONPATH (Mac OS X)
by Stayvoid Jan. 13, 2012

Jan. 13, 2012

Hey there! How to set it right? Cheers!

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Which libraries for Python 2.5.2
by Wayne Watson Jan. 1, 2012

Jan. 1, 2012

I'm trying to restore Python 2.5.2 on an old PC for a particular application that uses it from 4-5 years ago. According to the latest manual on it, the following should be installed. python-2.5.2.msi PIL-1.1.6.win32-py2.5.exe numpy-1.1.0-win32-superpack-python2.5.exe matplotlib-0.98.1.win32-py2.5.exe When I install them, and try to run the app program, Sentinel.py, some part of matplotlib complains (error msgs) and the program quits. The program begins with: from Tkinter import * from numpy import * import Image import ImageChops import ImageTk import time import binascii import tkMessageBox import tkSimpleDialog from pylab import plot, xlabel, ylabel, title, show, xticks, bar I tried numpy-1.2.0 and matplotlib-0.98.3 and had the same difficulty. What are wiser choices? -- Wayne Watson (Watson Adventures, Prop., Nevada City, CA) (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time) Obz Site: 39° 15' 7" N, 121° 2' 32" W, 2700 feet CE 1955 October 20 07:53:32.6 UT -- "The Date" The mystery unfolds. Web Page:<www.speckledwithstars.net/>

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ez_setup.py for Python3 64-bit on Vista
by Mark Lybrand Jan. 1, 2012

Jan. 1, 2012

I have found this script: http://peak.telecommunity.com/dist/ez_setup.py<http://pypi.python.org/pypi/setuptools> But I can see that this is Python 2.x Is there a Python 3 version, or should I be doing something else to install an .egg on my system? Thanks in advance. -- Mark :)

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Re: [Tutor] Drawing a figure
by Brylie Oxley Dec. 31, 2011

Dec. 31, 2011

There is a simple Python graphics library, written by John Zelle for his Python Programming textbook: http://mcsp.wartburg.edu/zelle/python/ http://mcsp.wartburg.edu/zelle/python/graphics/graphics/index.html The textbook is also worth reading. It is very well written. --Brylie Oxley

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Drawing a figure
by Stayvoid Dec. 30, 2011

Dec. 30, 2011

Hey there! I want to write a program that can draw a figure using the coordinates specified by the user and calculate its area. An output should be saved in tiff or png. What should I use for this? Cheers.

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python logger
by rail shafigulin Dec. 28, 2011

Dec. 28, 2011

has anyone used python logger before? i'm trying to adapt it for my workplace. right now it is pretty simplistic for me. i'm trying to generate extra output by the LoggerAdapter. however i'm getting errors. specifically i get the following message: Traceback (most recent call last): File "/usr/lib/python3.1/logging/__init__.py", line 770, in emit msg = self.format(record) File "/usr/lib/python3.1/logging/__init__.py", line 650, in format return fmt.format(record) File "/usr/lib/python3.1/logging/__init__.py", line 438, in format record.message = record.getMessage() File "/usr/lib/python3.1/logging/__init__.py", line 308, in getMessage msg = msg % self.args TypeError: not all arguments converted during string formatting i'm using this<http://docs.python.org/release/3.1.3/library/logging.html#using-loggeradapt…>documentation. any here is my code import logging import logging.handlers class TestInfo(object): def __init__(self, test_name = None, description = '', notes = '', expected = None, actual = None, status = 'Fail', timestamp = None): self.__test_name = test_name self.__description = description self.__notes = notes self.__expected = expected self.__actual = actual self.__status = status self.__timestamp = timestamp def __getitem__(self, name): """ To allow this instance to look like a dict. """ result = None if 'test_name' == name: result = self.__test_name elif 'description' == name: result = self.__description elif 'notes' == name: result = self.__notes elif 'expected' == name: result = self.__expected elif 'actual' == name: result = self.__actual elif 'status' == name: status = self.__status elif 'timestamp' == name: timestamp = self.__timestamp else: result = self.__dict__.get(name, "?") return result def __iter__(self): """ To allow iteration over keys, which will be merged into the LogRecord dict before formatting and output. """ names = ['test_name', 'description', 'notes', 'expected', 'actual', 'status', 'timestamp'] names.extend(self.__dict__.keys()) return names.__iter__() def main(): testinfo = TestInfo( test_name = 'myname', description = 'mydescription', notes = 'mynotes', expected = 'myexpected', actual = 'myactual', status = 'Fail', timestamp = 'mystamp') mylogger = logging.getLogger('mylogger') mylogger.setLevel(logging.DEBUG) filehandler = logging.FileHandler('test.log') filehandler.setLevel(logging.DEBUG) mylogger.addHandler(filehandler) mylogadapter = logger.LoggerAdapter(mylogger, testinfo) mylogadapter.info('this is a log message', testinfo) if __name__ == "__main__": main() any help on how to add extra output parameters is appreciated.

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help with script
by nicktocco＠comcast.net Dec. 28, 2011

Dec. 28, 2011

hello, my name is nick. i got python for software design by Allen B. Downey as a gift for christmas. i am completely new to programming and i am having trouble figuring out how to do an exercise concerning script.. my problem 5 x=5 x+1 im ok when it comes to using python so far. but it has asked me to put the problem into a script and run it. my question is how do i put that problem into a script and then how do i run it in python. im learning by myself at home so im having trouble figuring this out on my own. my os is win 7 i have python 2.7 sorry about punctuation!

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Re: [Tutor] [Python-Help] What is lambdas in Python??
by bob gailer Dec. 28, 2011

Dec. 28, 2011

On 12/27/2011 8:36 PM, Hitesh Kumar wrote: > I really don't get it. What is lambda? I keep seeing it and I couldn't > understand anything online about it. lambda An anonymous inline function consisting of a single /expression/ <#term-expression> which is evaluated when the function is called. The syntax to create a lambda function is lambda [arguments]: expression It is a way to create a simple anonymous function. func = lambda x, y : x + y is the equivalent of def func(x, y): return x = y Handy when the function returns an expression (no compound statements) and does not need a name, e.g. map(lambda x, y : x + y, (1,2,3), (4,5,6)) OK now you wonder what is map so: map(/function/, /iterable/, /.../) Apply /function/ to every item of /iterable/ and return a list of the results. If additional /iterable/ arguments are passed, /function/ must take that many arguments and is applied to the items from all iterables in parallel. If one iterable is shorter than another it is assumed to be extended with None items. If /function/ is None, the identity function is assumed; if there are multiple arguments, map() <#map> returns a list consisting of tuples containing the corresponding items from all iterables (a kind of transpose operation). The /iterable/ arguments may be a sequence or any iterable object; the result is always a list. >>> print map(lambda x, y : x + y, (1,2,3), (4,5,6)) [5, 7, 9] -- Bob Gailer 919-636-4239 Chapel Hill NC

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