🌐 Mailman 3 November 2006 - Tutor - python.org

ossaudiodev, pygtk, and flushing buffers
by Matthew White Aug. 3, 2007

Aug. 3, 2007

Hello All, I'm writing a little audio player that plays voicemail files. (I realize I'm reinventing the wheel, but it's still fun.) The problem I'm experiencing is that I'm hearing the last fraction of the sound clip twice, either when the clip is done playing or when the program exits. I've tried a few things and none of them have worked. The bit of code that does the playing is here: def play(self): if self.data_written < self.file_length: buf = self.data.read(self.buf_size) self.data_written += self.dsp.write(buf) self.percent_done = self.data_written / self.file_length if self.data_written == self.file_length: self._reopen_audio_device() This causes the second playing of the "last little bit" when the end of the file is reached. When I don't include the second if statement, the "last little bit" gets played when the program exits. According to the documentaiton, closing the audio device will flush any data in the sound card buffer. I guess what I'm hearing is that buffered clip being flushed. I've thought about using the mixer device to put the volume to zero, flush the buffer, then turning the volume back up again, but that seems like a hack. If anyone decides to use this program, you'll need to use a .wav file and change the value of self.sample_rate in vmPlayer.py from 8000 to 44100 (or whatever rate your file is encoded in) (Also, I plan on auto-detecting the sample rate in the future. I hard coded 8000 because that's the rate the voice mail system uses.) See attached files for the code. -mtw

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question
by Doug Potter Feb. 14, 2007

Feb. 14, 2007

I don't get the output I would expect from the following. The variable clean1 gives me an empty string. But if i change the for loop to print i[26:40] I get all the info. what do I need to do to capture all the data to clean1? Thanks. >>> a = open('arp.txt') >>> file = a.read() >>> file = file.split('\n') >>> a.close() >>> b = open('arplist.txt','w') >>> clean1 = [] >>> >>> for i in file: ... clean1 = i[26:40] ... >>> clean1 ''

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Filesystem Usage
by Steve Nelson Jan. 19, 2007

Jan. 19, 2007

Hello chums, How can I go about getting info similar to that which the UNIX df command provides - of filesystem usage and inode usage? I could just shell out and run a df command, but I would rather use python bindings. What's the recommendation? S.

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python Error:IndentationError: expected an indented block
by Antonios Katsikadamos Jan. 9, 2007

Jan. 9, 2007

hi all. I try to run an old python code and i get the following message File "/home/antonis/db/access.py", line 119 def DoCsubnet1 (action, subject, target, args): # DoC servers net ^ IndentationError: expected an indented block 1) and I don't know what causes it. I would be grate full if you could give me a tip. 2) how can i overcome it? Can i use the keyword pass?and if how ccan i use it Kind regards, Antonios --------------------------------- Sponsored Link Degrees online in as fast as 1 Yr - MBA, Bachelor's, Master's, Associate - Click now to apply

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is gotchas?
by Tim Johnson Jan. 9, 2007

Jan. 9, 2007

I've been using python is 1.5* but haven't used `is` that much. 1)where do `is` and `==` yield the same results? 2)where do they not yield the same results? 3)is there a special method for `is'. 4)Pointers to docs are welcome. thanks tim -- Tim Johnson <tim(a)johnsons-web.com> http://www.alaska-internet-solutions.com

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__init__.py for running a file from commandline?
by Marcus Goldfish Dec. 7, 2006

Dec. 7, 2006

Hoping someone can help with this... I have a logical python namespace using a directory tree and __init__.py files. For example, PYTHONPATH points to ~pyroot, and I have the following: ~pyroot/ ~pyroot/utils/ ~pyroot/utils/commands/mygrep.py Which makes it nice to code: # some python script import utils.commands.mygrep as grep However, I have a problem when running python scripts from the command line. I would like to do this: > python utils.commands.mygrep.py but it doesn't work. Is there a trick, or something that I am missing, that will let me run scripts like that? Thanks! Marcus ps-- WinXP, python 2.4

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how to save wxpython output
by Ketan Maheshwari Dec. 5, 2006

Dec. 5, 2006

Hi *: How do I save the output of a wxpython program as a jpg or png image from within the program? Thanks, k.

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Rounding a float to n significant digits
by Dick Moores Dec. 4, 2006

Dec. 4, 2006

I just dug this Tim Smith creation out of the Tutor archive. def round_to_n(x, n): """ Rounds float x to n significant digits, in scientific notation. Written by Tim Peters. See his Tutor list post of 7/3/04 at http://mail.python.org/pipermail/tutor/2004-July/030324.html """ if n < 1: raise ValueError("number of significant digits must be >= 1") return "%.*e" % (n-1, x) Thought others might find it of use. Dick Moores

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database web app, what tool?
by Paulino Dec. 4, 2006

Dec. 4, 2006

Hi! Im a very biginner in programming and I started with python, witch I found much easier tahn i thought. I want to build an intranet page in my organization that shows some data from our financial aplication's database. For the starting point I would like it to show invoices lists per supplier and link each line to a pdf image of the selected invoice that is stored in a determined folder. The aim is only to make querys and show the results. No updates, nor insert's The database is MS SQL 2005 Right now I connect to the database via pymssql, and i can retrieve data and send it to a wx.Grid or to a reportlab pdf file, with platypus tables (a couple of months ago i would say i'd never be able to do it... and now i want to do more...) Now I want to send it to the browser so the administration can see it every time they need. What tool is more suitable? There are so many options! Zope-Plone have it's own web server, so less config is required. But i can't find any recipe or tutorial usefull for this task... there is also django, turbogears, webware, apache and mod-python..... Thank you Paulino

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Best Known Method for Filtering redundant list items.
by Chris Hengge Dec. 1, 2006

Dec. 1, 2006

Anyone point me to something more efficient then for item in list1: if item not in list2: list2.append() This just seems to take a bit a time when there are thousands or dozens of thousands of records just to filter out the dozen or so copies.. Thanks.

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