Mailman 3 February 2012 - Tutor

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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Which computer operating system is best for Python developers?
by Tamar Osher March 2, 2012

March 2, 2012

Hi. I am still having trouble installing and using Python on my (new) Windows 7 computer, but I plan to contact Microsoft forums and see if they can help me, since this is a Windows problem and not a Python problem. My question: For the future, what type of computer is best for Python developers? Do all Python developers use some type of Unix computer? I appreciate your feedback and look forward to hearing from you. Thanks for your time. >From Your Friend: Tamar Osher Email: EmeraldOffice(a)hotmail.com

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new to programming and wondering about an IDE for Python on Linux
by John Jensen March 1, 2012

March 1, 2012

Hi All, I'm new to programming and wondering about an IDE for Python on Linux. I'd appreciate any feedback on this and good tutorials or books on Python 3 and the IDEs suggested. There are many available and I'm wondering what you as users find effective. Thanks, John

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FW: python dictionary and loop
by Prasad, Ramit Feb. 29, 2012

Feb. 29, 2012

Please do not top post and also please remember to reply back to the list. >Okay thanks for clarifying that that code doesn't split anything. I've been playing around a little bit. I think this is closer to what I am trying to do: >>>>paragraph = 'This is line one\nLet me show you how' >>>> paragraph.split('\n') >['This is line one', 'Let me show you how'] >>>> first_sentence,second_sentence = paragraph.split('\n') >>>> d = {first_sentence:second_sentence} >>>> d >{'This is line one': 'Let me show you how'} ># wouldn't the above code capture what I am trying to do as far as split the string 'paragraph' into two sentences and then create a dictionary {d} that will separate the two sentences so that one sentence {first_sentence} represents a key value and the other sentence {second_sentence} represents the value of the key? Yes. it does seem to. What is the reason that you want to do this though? I usually use this when loading some tabular data like from a csv/Excel file. Not sure I see the point when done for a 'paragraph'. Ramit Ramit Prasad | JPMorgan Chase Investment Bank | Currencies Technology 712 Main Street | Houston, TX 77002 work phone: 713 - 216 - 5423 -- This email is confidential and subject to important disclaimers and conditions including on offers for the purchase or sale of securities, accuracy and completeness of information, viruses, confidentiality, legal privilege, and legal entity disclaimers, available at http://www.jpmorgan.com/pages/disclosures/email.

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Popen.terminate() - WindowsError: [Error 5] Access is denied
by Nikunj Badjatya Feb. 29, 2012

Feb. 29, 2012

Howdy All, Py ver - 3.2, Windows-XP . Logged in as user with admin privileges. >From my main python program, I am running powershell program using subprocess.Popen(....). Now I have created a signal_handler() function in main python script which will handle CTRL-C ( This works fine ). Now when I put "proc.terminate()" in my signal_handler() function to terminate the subprocess created as well, It is giving me "WindowsError: [Error 5] Access is denied" error. I have tried with os.kill() also, same error. Tried with Popen.kill() also same error. Have googled a bit but couldn't understand them. In general, How to kill a subprocesses created from a python program.? If that subprocess also creates a new process from itself, how can I kill all child processes from my main python script.? Any ideas.?? Thanks, Nikunj

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how to stop a program in python which is running for long time , I am using windows
by Debashish Saha Feb. 29, 2012

Feb. 29, 2012

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how to stop a program in python which is running for long time
by Debashish Saha Feb. 29, 2012

Feb. 29, 2012

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python dictionary and loop
by justin fargus Feb. 28, 2012

Feb. 28, 2012

Hello, I am trying to do the following: Make a program using two sentences of about 8 words (total between the two sentences). I would then like to create a dictionary {} and split the words of each sentence using one sentence as a dictionary key and using the other sentence for the dictionary value. I would then like to use a loop (while or for) that will write out a file that has the dictionary key and dictionary value to it. How can I go about doing this? I've noticed with Python there is more than one way to do most things. I would like the simplest so that I can practice over and over again on my own until I understand it. Thanks in advance I forgot to add in my first email that I am using Windows Vista 64x and running Python 3.2.2. The two sentences I would like to use in the program is the following: "This is line one\nThis is line two!" so I write: text_message = "This is line one\nThis is line two!" The dictionary name and key/value pairs will be: my_sentences {'This':'This','is':'is','line':'line','one':'two'} # Does this code split the words of each sentence so that the words in sentence 1 are keys, and the words in sentence 2 are values?

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python questions about dictionary loops
by justin fargus Feb. 28, 2012

Feb. 28, 2012

Hello, I'm new to Python. Just started a few weeks ago and I've been learning some basic things that I would like to put together but I don't even know where to began. I am trying to do the following: Make a program using two sentences of about 8 words (total between the two sentences). I would then like to create a dictionary {} and split the words of each sentence using one sentence as a dictionary key and using the other sentence for the dictionary value. I would then like to use a loop (while or for) that will write out a file that has the dictionary key and dictionary value to it. How can I go about doing this? I've noticed with Python there is more than one way to do most things. I would like the simplest so that I can practice over and over again on my own until I understand it. Thanks in advance Regards, Justin

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